Dnv os f101 submarine pipeline systems

1. OFFSHORE STANDARD
DNV-OS-F101
SUBMARINE PIPELINE SYSTEMS
OCTOBER 2007
Since issued in print (October 2007), this booklet has been amended, latest in October 2008.
See the reference to “Amendments and Corrections” on the next page.
DET NORSKE VERITAS

2. FOREWORD
DET NORSKE VERITAS (DNV) is an autonomous and independent foundation with the objectives of safeguarding life, prop-
erty and the environment, at sea and onshore. DNV undertakes classification, certification, and other verification and consultancy
services relating to quality of ships, offshore units and installations, and onshore industries worldwide, and carries out research
in relation to these functions.
DNV Offshore Codes consist of a three level hierarchy of documents:
— Offshore Service Specifications. Provide principles and procedures of DNV classification, certification, verification and con-
sultancy services.
— Offshore Standards. Provide technical provisions and acceptance criteria for general use by the offshore industry as well as
the technical basis for DNV offshore services.
— Recommended Practices. Provide proven technology and sound engineering practice as well as guidance for the higher level
Offshore Service Specifications and Offshore Standards.
DNV Offshore Codes are offered within the following areas:
A) Qualification, Quality and Safety Methodology
B) Materials Technology
C) Structures
D) Systems
E) Special Facilities
F) Pipelines and Risers
G) Asset Operation
H) Marine Operations
J) Wind Turbines
Amendments and Corrections
This document is valid until superseded by a new revision. Minor amendments and corrections will be published in a separate
document normally updated twice per year (April and October).
For a complete listing of the changes, see the “Amendments and Corrections” document located at:
http://webshop.dnv.com/global/, under category “Offshore Codes”.
The electronic web-versions of the DNV Offshore Codes will be regularly updated to include these amendments and corrections.
Comments may be sent by e-mail to rules@dnv.com
For subscription orders or information about subscription terms, please use distribution@dnv.com
Comprehensive information about DNV services, research and publications can be found at http://www.dnv.com, or can be obtained from DNV,
Veritasveien 1, NO-1322 Høvik, Norway; Tel +47 67 57 99 00, Fax +47 67 57 99 11.
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Norske Veritas.

3. General
This document supersedes the January 2000 edition, as amended in October 2005.
Main changes
In addition to updating the material related parts, DNV has used this opportunity to update the operation phase requirements,
making it more transparent from design until abandonment. This included a re-assessment of the documentation requirements
that now constitutes Sec.12 moved from Sec.3. This work has also been funded by a JIP from the industry. Minor changes have
been made to the layout of the design sections. The intention is to make the design more consistent and transparent, in particular
with respect to load combinations. The resulting design is not intended to be changed. Some requirements have been added with
respect to Hydrogen Induced Stress Cracking (HISC).
Acknowledgement
The current revision of DNV-OS-F101 has been sponsored by three different Joint Industry Projects. The work has been performed
by DNV and discussed in several workshops with individuals from the different companies. They are hereby all acknowledged for
their valuable and constructive input. In case consensus has not been achievable DNV has sought to provide acceptable compromise
agreement.
The two material related JIP's have in total been sponsored by:
BP MRM Technip
Chevron NSC Tenaris
Corus PTT V&M
Europipe Saipem Vector
FMC Sintef Vetco
Hydro Statoil Woodside
JFE Subsea7
The operation JIP has been sponsored by:
ConocoPhillips Gassco Shell
DONG Hydro Statoil
ENI
In addition, individuals from the following companies have been reviewers in the hearing process:
Acergy Hydro Statoil
Allseas Inoxtech Sumitomo Corp., Europe
Butting Intec Tenaris Dalmine
Europipe JFE V & M Deutschland
Gorgon Nippon Steel
DNV is grateful for the valuable co-operations and discussions with the individual personnel in these companies.
DET NORSKE VERITAS

4. DET NORSKE VERITAS

5. Amended October 2008 Offshore Standard DNV-OS-F101, October 2007
see note on front cover Contents – Page 5
CONTENTS
Sec. 1 General................................................................. 13 Sec. 4 Design - Loads..................................................... 34
A. General.................................................................................. 13 A. General..................................................................................34
A 100 Introduction..................................................................... 13 A 100 Objective......................................................................... 34
A 200 Objectives ....................................................................... 13 A 200 Application ..................................................................... 34
A 300 Scope and application ..................................................... 13 A 300 Load scenarios ................................................................ 34
A 400 Alternative methods and procedures............................... 14 A 400 Load categories............................................................... 34
A 500 Structure of Standard ...................................................... 14 A 500 Design cases.................................................................... 34
A 600 Other codes ..................................................................... 14 A 600 Load effect combination ................................................. 34
B. References ............................................................................ 15 B. Functional Loads ..................................................................34
B 100 Offshore Service Specifications...................................... 15 B 100 General............................................................................ 34
B 200 Offshore Standards ......................................................... 15 B 200 Internal Pressure loads.................................................... 34
B 300 Recommended Practices ................................................. 15 B 300 External Pressure loads................................................... 35
B 400 Rules ............................................................................... 15
B 500 Certification notes and classification notes .................... 15 C. Environmental Loads............................................................35
B 600 Other references.............................................................. 15 C 100 General............................................................................ 35
C 200 Wind loads ...................................................................... 35
C. Definitions ............................................................................ 18 C 300 Hydrodynamic loads....................................................... 35
C 100 Verbal forms ................................................................... 18 C 400 Ice loads .......................................................................... 36
C 200 Definitions ...................................................................... 18 C 500 Earthquake ...................................................................... 36
C 300 Definitions (continuation)............................................... 21 C 600 Characteristic environmental load effects ...................... 36
D. Abbreviations and Symbols.................................................. 22 D. Construction Loads...............................................................38
D 100 Abbreviations.................................................................. 22 D 100 General............................................................................ 38
D 200 Symbols .......................................................................... 23
D 300 Greek characters ............................................................. 24 E. Interference Loads ................................................................38
D 400 Subscripts........................................................................ 25 E 100 General............................................................................ 38
Sec. 2 Safety Philosophy................................................ 26 F. Accidental Loads ..................................................................38
F 100 General............................................................................ 38
A. General.................................................................................. 26
A 100 Objective......................................................................... 26 G. Design Load Effects .............................................................39
A 200 Application...................................................................... 26 G 100 Design cases.................................................................... 39
G 200 Load combinations.......................................................... 39
B. Safety Philosophy Structure ................................................ 26 G 300 Load effect calculations.................................................. 40
B 100 General............................................................................ 26
B 200 Safety objective............................................................... 26 Sec. 5 Design – Limit State Criteria ........................... 41
B 300 Systematic review of risks .............................................. 27
B 400 Design criteria principles ................................................ 27 A. General..................................................................................41
B 500 Quality assurance............................................................ 27 A 100 Objective......................................................................... 41
B 600 Health, safety and environment ...................................... 27 A 200 Application ..................................................................... 41
C. Risk Basis for Design ........................................................... 27 B. System Design Principles .....................................................41
C 100 General............................................................................ 27 B 100 Submarine pipeline system layout .................................. 41
C 200 Categorisation of fluids................................................... 27 B 200 Mill pressure test and system pressure test..................... 42
C 300 Location classes .............................................................. 28 B 300 Operating requirements .................................................. 43
C 400 Safety classes .................................................................. 28
C 500 Reliability analysis.......................................................... 28 C. Design Format ......................................................................43
C 100 General............................................................................ 43
Sec. 3 Concept Development and Design Premises .... 29 C 200 Design resistance ............................................................ 43
C 300 Characteristic material properties ................................... 44
A. General.................................................................................. 29 C 400 Stress and strain calculations .......................................... 45
A 100 Objective......................................................................... 29
A 200 Application...................................................................... 29 D. Limit States...........................................................................46
A 300 Concept development ..................................................... 29 D 100General............................................................................ 46
D 200Pressure containment (bursting) ..................................... 46
B. System Design Principles ..................................................... 29 D 300Local buckling - General ................................................ 46
B 100 System integrity .............................................................. 29 D 400Local Buckling – External over pressure only
B 200 Monitoring/inspection during operation ......................... 29 (System collapse)............................................................ 46
B 300 Pressure Protection System............................................. 30 D 500 Propagation buckling ..................................................... 47
B 400 Hydraulic analyses and flow assurance .......................... 30 D 600 Local Buckling - Combined Loading Criteria ................ 47
D 700 Global buckling ............................................................. 49
C. Pipeline Route....................................................................... 31 D 800 Fatigue ............................................................................ 49
C 100 Location .......................................................................... 31 D 900 Ovalisation...................................................................... 50
C 200 Route survey ................................................................... 31 D 1000 Accumulated deformation .............................................. 50
C 300 Seabed properties............................................................ 32 D 1100 Fracture and supplementary requirement P .................... 50
D 1200 Ultimate limit state – Accidental loads........................... 51
D. Environmental Conditions.................................................... 32
D 100 General............................................................................ 32 E. Special Considerations .........................................................51
D 200 Collection of environmental data.................................... 32 E 100 General............................................................................ 51
D 300 Environmental data ......................................................... 32 E 200 Pipe soil interaction ........................................................ 51
E 300 Spanning risers/pipelines ................................................ 52
E. External and Internal Pipe Condition ................................... 33 E 400 On bottom stability ......................................................... 52
E 100 External operational conditions ...................................... 33 E 500 Trawling interference...................................................... 52
E 200 Internal installation conditions........................................ 33 E 600 Third party loads, dropped objects ................................. 53
E 300 Internal operational conditions ....................................... 33 E 700 Thermal Insulation.......................................................... 53
DET NORSKE VERITAS

6. Offshore Standard DNV-OS-F101, October 2007 Amended October 2008
Page 6 – Contents see note on front cover
E 800 Settings from Plugs .........................................................53 D. Clad or Lined Steel Linepipe................................................77
D 100 General ............................................................................77
F. Pipeline Components and Accessories ................................. 53 D 200 Pipe designation ..............................................................77
F 100 General ............................................................................53 D 300 Manufacturing Procedure Specification .........................77
F 200 Design of bends...............................................................54 D 400 Manufacture ....................................................................78
F 300 Design of insulating joints ..............................................54 D 500 Acceptance criteria..........................................................78
F 400 Design of pig traps ..........................................................54 D 600 Inspection ........................................................................79
F 500 Design of valves..............................................................54
F 600 Pipeline fittings ...............................................................55 E. Hydrostatic Testing...............................................................80
E 100 Mill pressure test.............................................................80
G. Supporting Structure............................................................. 55
G 100 General ............................................................................55 F. Non-destructive Testing........................................................80
G 200 Pipe-in-pipe and bundles.................................................55 F 100 Visual inspection.............................................................80
G 300 Riser supports..................................................................55 F 200 Non-destructive testing ...................................................80
G 400 J-tubes .............................................................................55
G 500 Stability of gravel supports and gravel covers ................55 G. Dimensions, Mass and Tolerances ....................................... 81
G 100 General ............................................................................81
H. Installation and Repair.......................................................... 56 G 200 Tolerances .......................................................................81
H 100 General ............................................................................56 G 300 Inspection ........................................................................82
H 200 Pipe straightness..............................................................56
H 300 Coating ............................................................................56 H. Marking, Delivery Condition and Documentation ...............84
H 100 Marking...........................................................................84
Sec. 6 Design - Materials Engineering......................... 57 H 200 Delivery condition...........................................................84
H 300 Handling and storage .....................................................84
A. General.................................................................................. 57 H 400 Documentation, records and certification .......................84
A 100 Objective .........................................................................57
A 200 Application......................................................................57 I. Supplementary Requirements...............................................84
A 300 Documentation ................................................................57 I 100 Supplementary requirement, sour service (S) .................84
I 200 Supplementary requirement,
B. Materials Selection for Linepipe fracture arrest properties (F) ...........................................85
and Pipeline Components ..................................................... 57 I 300 Supplementary requirement, linepipe for plastic
B 100 General ............................................................................57 deformation (P) ...............................................................86
B 200 Sour service.....................................................................57 I 400 Supplementary requirement, dimensions (D) .................87
B 300 Corrosion resistant alloys (informative) .........................58 I 500 Supplementary requirement, high utilisation (U) ...........88
B 400 Linepipe (informative) ....................................................58
B 500 Pipeline components (informative) .................................59 Sec. 8 Construction - Components and Assemblies ... 89
B 600 Bolts and nuts..................................................................59
B 700 Welding consumables (informative) ...............................59 A. General..................................................................................89
A 100 Objective .........................................................................89
C. Materials Specification ......................................................... 59 A 200 Application......................................................................89
C 100 General ............................................................................59 A 300 Quality assurance ............................................................89
C 200 Linepipe specification .....................................................60
C 300 Components specification ..............................................60 B. Component Requirements ....................................................89
C 400 Specification of bolts and nuts ........................................60 B 100 General ............................................................................89
C 500 Coating specification.......................................................60 B 200 Component specification.................................................89
C 600 Galvanic anodes specification.........................................61 B 300 Induction bends – additional and
D. Corrosion Control ................................................................. 61 modified requirements to ISO 15590-1 ..........................89
D 100 General ............................................................................61 B 400 Fittings, tees and wyes - additional requirements to
D 200 Corrosion allowance .......................................................61 ISO 15590-2....................................................................90
D 300 Temporary corrosion protection......................................61 B 500 Flanges and flanged connections -
D 400 External pipeline coatings (informative).........................62 additional requirements to ISO 15590-3.........................92
D 500 Cathodic Protection.........................................................62 B 600 Valves – Additional requirements to ISO 14723 ............92
D 600 External corrosion control of risers B 700 Mechanical connectors....................................................93
(informative) ...................................................................63 B 800 CP Insulating joints.........................................................93
D 700 Internal corrosion control (informative) .........................64 B 900 Anchor flanges ................................................................94
B 1000 Buckle- and fracture arrestors .........................................94
Sec. 7 Construction – Linepipe .................................... 66 B 1100 Pig traps...........................................................................94
B 1200 Repair clamps and repair couplings ................................94
A. General.................................................................................. 66
A 100 Objective .........................................................................66 C. Materials for Components ....................................................94
A 200 Application......................................................................66 C 100 General ............................................................................94
A 300 Process of manufacture ...................................................66 C 200 C-Mn and low alloy steel forgings and castings .............94
A 400 Supplementary requirements...........................................66 C 300 Duplex stainless steel, forgings and castings ..................95
A 500 Linepipe specification ....................................................66 C 400 Pipe and plate material....................................................95
A 600 Manufacturing Procedure Specification and C 500 Sour Service ....................................................................95
qualification ....................................................................66
D. Manufacture..........................................................................95
B. Carbon Manganese (C-Mn) Steel Linepipe.......................... 67 D 100 Manufacturing procedure specification (MPS) ..............95
B 100 General ............................................................................67 D 200 Forging ............................................................................95
B 200 Pipe designation .............................................................67 D 300 Casting ............................................................................96
B 300 Manufacturing .................................................................67 D 400 Hot forming.....................................................................96
B 400 Acceptance criteria..........................................................69 D 500 Heat treatment .................................................................96
B 500 Inspection ........................................................................72 D 600 Welding...........................................................................96
D 700 NDT ................................................................................96
C. Corrosion Resistant Alloy (CRA) Linepipe ......................... 75
C 100 General ............................................................................75 E. Mechanical and Corrosion Testing of Hot Formed,
C 200 Pipe designation ..............................................................75 Cast and Forged Components...............................................96
C 300 Manufacture ....................................................................75 E 100 General testing requirements ..........................................96
C 400 Acceptance criteria..........................................................75 E 200 Acceptance criteria for C-Mn and low alloy steels ........97
C 500 Inspection ........................................................................76 E 300 Acceptance criteria for duplex stainless steels................98
DET NORSKE VERITAS

7. Amended October 2008 Offshore Standard DNV-OS-F101, October 2007
see note on front cover Contents – Page 7
F. Fabrication of Risers, Expansion Loops, Pipe Strings for essential variables and validity ..................................... 108
Reeling and Towing.............................................................. 98 D 400 Operating limit conditions ............................................ 109
F 100 General............................................................................ 98 D 500 Installation procedures.................................................. 109
F 200 Materials for risers, expansion loops, pipe strings for D 600 Contingency procedures ............................................... 109
reeling and towing .......................................................... 98 D 700 Layvessel arrangement, laying equipment and
F 300 Fabrication procedures and planning.............................. 98 instrumentation ............................................................. 109
F 400 Material receipt, identification and tracking................... 98 D 800 Requirements for installation........................................ 110
F 500 Cutting, forming, assembly, welding and
heat treatment.................................................................. 98 E. Additional Requirements for Pipeline Installation Methods
F 600 Hydrostatic testing .......................................................... 98 Introducing Plastic Deformations .......................................111
F 700 NDT and visual examination .......................................... 99 E 100 General.......................................................................... 111
F 800 Dimensional verification................................................. 99 E 200 Installation manual........................................................ 111
F 900 Corrosion protection ....................................................... 99 E 300 Qualification of the installation manual ....................... 111
E 400 Installation procedures.................................................. 111
G. Hydrostatic Testing............................................................... 99 E 500 Requirements for installation........................................ 111
G 100 Hydrostatic testing .......................................................... 99
G 200 Alternative test pressures ................................................ 99 F. Pipeline Installation by Towing..........................................112
F 100 General.......................................................................... 112
H. Documentation, Records, Certification F 200 Installation manual........................................................ 112
and Marking ....................................................................... 100 F 300 Qualification of installation manual ............................. 112
H 100 General.......................................................................... 100 F 400 Operating limit conditions ............................................ 112
F 500 Installation procedures.................................................. 112
Sec. 9 Construction - Corrosion Protection and F 600 Contingency procedures ............................................... 112
Weight Coating .................................................. 101 F 700 Arrangement, equipment and instrumentation ............. 112
F 800 Pipestring tow and installation...................................... 112
A. General................................................................................ 101
A 100 Objective....................................................................... 101 G. Other Installation Methods .................................................112
A 200 Application.................................................................... 101 G 100 General.......................................................................... 112
B. External Corrosion Protective Coatings ............................. 101 H. Shore Pull............................................................................113
B 100 General.......................................................................... 101 H 100 General.......................................................................... 113
B 200 Coating materials, surface preparation, H 200 Installation manual........................................................ 113
coating application and inspection/testing of coating... 101 H 300 Qualification of installation manual ............................. 113
H 400 Operating limit conditions ............................................ 113
C. Concrete Weight Coating ................................................... 101 H 500 Installation procedures.................................................. 113
C 100 General.......................................................................... 101 H 600 Contingency procedures ............................................... 113
C 200 Concrete materials and coating manufacture................ 102 H 700 Arrangement, equipment and instrumentation ............. 113
C 300 Inspection and testing ................................................... 102 H 800 Requirements for installation........................................ 113
D. Manufacture of Galvanic Anodes....................................... 102 I. Tie-in Operations ................................................................113
D 100 Anode manufacture....................................................... 102 I 100 General.......................................................................... 113
I 200 Installation manual........................................................ 113
E. Installation of Galvanic Anodes ......................................... 103 I 300 Qualification of installation manual ............................. 113
E 100 Anode installation ......................................................... 103 I 400 Operating limit conditions ............................................ 113
I 500 Tie-in procedures .......................................................... 113
Sec. 10 Construction - Installation ............................... 104 I 600 Contingency procedures ............................................... 114
I 700 Tie-in operations above water ...................................... 114
A. General................................................................................ 104 I 800 Tie-in operations below water ...................................... 114
A 100 Objective....................................................................... 104
A 200 Application.................................................................... 104 J. As-Laid Survey...................................................................114
A 300 Failure Mode Effect Analysis (FMEA) and J 100 General.......................................................................... 114
Hazard and Operability (HAZOP) studies.................... 104 J 200 Specification of as-laid survey...................................... 114
A 400 Installation and testing specifications and drawings..... 104 J 300 As-laid survey............................................................... 114
A 500 Installation manuals ...................................................... 104 J 400 As-laid survey of corrosion protection systems............ 114
A 600 Quality assurance.......................................................... 104
A 700 Welding......................................................................... 104 K. Span Rectification and Pipeline Protection ........................114
A 800 Non-destructive testing and visual examination........... 105 K 100 General.......................................................................... 114
A 900 Production tests............................................................. 105 K 200 Span rectification and protection specification............. 114
K 300 Span rectification .......................................................... 115
B. Pipeline Route, Survey and Preparation ............................. 105 K 400 Trenching...................................................................... 115
B 100 Pre-installation route survey ......................................... 105 K 500 Post-installation gravel dumping .................................. 115
B 200 Seabed preparation........................................................ 106 K 600 Grout bags and concrete mattresses.............................. 115
B 300 Pipeline and cable crossings ......................................... 106
B 400 Preparations for shore approach ................................... 106 L. Installation of Protective and Anchoring Structures...........116
L 100 General.......................................................................... 116
C. Marine Operations .............................................................. 106
C 100 General.......................................................................... 106 M. Installation of Risers ...........................................................116
C 200 Vessels .......................................................................... 106 M 100 General.......................................................................... 116
C 300 Anchoring systems, anchor patterns and anchor M 200 Installation manual........................................................ 116
positioning .................................................................... 106 M 300 Qualification of the installation manual ....................... 116
C 400 Positioning systems ...................................................... 107 M 400 Operating limit conditions ............................................ 116
C 500 Dynamic positioning..................................................... 107 M 500 Contingency procedures ............................................... 116
C 600 Cranes and lifting equipment........................................ 107 M 600 Requirements for installation........................................ 116
C 700 Anchor handling and tug management ......................... 107
C 800 Contingency procedures ............................................... 107 N. As-Built Survey ..................................................................116
N 100 General.......................................................................... 116
D. Pipeline Installation ............................................................ 107 N 200 Specification of as-built survey .................................... 116
D 100 General.......................................................................... 107 N 300 As-built survey requirements........................................ 117
D 200 Installation manual........................................................ 108 N 400 Inspection of impressed current cathodic corrosion
D 300 Review and qualification of the installation manual, protection system .......................................................... 117
DET NORSKE VERITAS

8. Offshore Standard DNV-OS-F101, October 2007 Amended October 2008
Page 8 – Contents see note on front cover
O. Final Testing and Preparation for Operation ...................... 117 C 200 Corrosion control system and weight coating ..............128
O 100 General ..........................................................................117 C 300 DFI-resumé ...................................................................128
O 200 Specification of final testing and preparation for
operation........................................................................117 D. Construction - Installation
O 300 Procedures for final testing and preparation for and Pre-Commissioning......................................................128
operation........................................................................117 D 100 General ..........................................................................128
O 400 Cleaning and gauging....................................................117 D 200 DFI-Resumé ..................................................................129
O 500 System pressure testing .................................................118
O 600 De-watering and drying ................................................119 E. Operation - Commissioning................................................ 129
O 700 Systems testing..............................................................119 E 100 General ..........................................................................129
P. Documentation.................................................................... 119 F. Operation ............................................................................129
P 100 General ..........................................................................119 F 100 General ..........................................................................129
F 200 In-Service file................................................................129
Sec. 11 Operations and Abandonment ........................ 120
G. Abandonment......................................................................129
A. General................................................................................ 120 G 100 General ..........................................................................129
A 100 Objective .......................................................................120
A 200 Scope and application ...................................................120 H. DFI Resumé ........................................................................129
A 300 Responsibilities .............................................................120 H 100 General ..........................................................................129
A 400 Authority and company requirements...........................120 H 200 DFI resumé content.......................................................129
A 500 Safety philosophy..........................................................120
I. Filing of Documentation.....................................................130
B. Commissioning................................................................... 120 I 100 General ..........................................................................130
B 100 General ..........................................................................120
B 200 Fluid filling ...................................................................120 Sec. 13 Commentary (Informative)............................. 131
B 300 Operational verification ................................................120
A. General................................................................................131
C. Integrity Management System............................................ 120 A 100 Objective .......................................................................131
C 100 General ..........................................................................120
C 200 Company policy ............................................................121 B. Cross References ................................................................131
C 300 Organisation and personnel...........................................121
C 400 Condition evaluation and assessment methods .............121 C. Design Philosophy ..............................................................132
C 500 Planning and execution of activities .............................121 C 100 Safety Class discussion .................................................132
C 600 Management of change .................................................121 C 200 Structural reliability analyses........................................132
C 700 Operational controls and procedures.............................121 C 300 Characteristic values .....................................................133
C 800 Contingency plans.........................................................121
C 900 Reporting and communication ......................................121 D. Loads...................................................................................133
C 1000 Audit and review ...........................................................121 D 100 Conversion of pressures ................................................133
C 1100 Information management ..............................................121
E. Design Criteria....................................................................133
D. Integrity Management Process ........................................... 122 E 100General ..........................................................................133
D 100 General ..........................................................................122 E 200Condition load effect factors.........................................133
D 200 Evaluation of threats and condition ..............................122 E 300Calculation of nominal thickness..................................133
D 300 External inspection........................................................122 E 400Pressure containment - equivalent format.....................134
D 400 In-line inspection...........................................................123 E 500Pressure containment criterion,
D 500 Corrosion monitoring....................................................123 incidental pressure less than 10% above the design
D 600 Integrity assessment ......................................................124 pressure. ........................................................................134
D 700 Mitigation, intervention and repairs..............................124 E 600 HIPPS and similar systems ...........................................134
E 700 Local buckling - Collapse .............................................135
E. Re-qualification .................................................................. 125 E 800 Buckle arrestor ..............................................................135
E 100 General ..........................................................................125 E 900 Local buckling - Moment..............................................135
E 200 Application....................................................................125 E 1000 Local buckling - Girth weld factor................................135
E 300 Safety level....................................................................125 E 1100 Ovalisation ....................................................................135
E 400 System pressure test ......................................................125
E 500 Deterioration .................................................................125 F. API Material Grades ........................................................... 136
E 600 Design criteria ...............................................................125 F 100 API material grades.......................................................136
F. De-commissioning.............................................................. 126 G. Components and Assemblies..............................................136
F 100 General ..........................................................................126 G 100 Riser Supports ...............................................................136
G 200 J-tubes ...........................................................................136
G. Abandonment...................................................................... 126
G 100 General ..........................................................................126 H. Installation ..........................................................................136
H 100 Safety class definition ...................................................136
Sec. 12 Documentation.................................................. 127 H 200 Coating ..........................................................................136
H 300 Simplified laying criteria ..............................................137
A. General................................................................................ 127 H 400 Reeling ..........................................................................137
A 100 Objective .......................................................................127
I. References...........................................................................139
B. Design................................................................................. 127
B 100 Structural .......................................................................127 App. A Structural Integrity of Girth Welds in
B 200 Linepipe and pipeline components
(including welding) .......................................................127 Offshore Pipelines............................................................ 140
B 300 Corrosion control systems and weight coating .............127
B 400 Installation.....................................................................128 A. General................................................................................140
B 500 Operation.......................................................................128 A 100 Objective .......................................................................140
B 600 DFI-Resumé ..................................................................128 A 200 Introduction...................................................................140
A 300 Application....................................................................140
C. Construction - Manufacturing
and Fabrication ................................................................... 128 B. Assessment Categories .......................................................141
C 100 Linepipe and pipeline component .................................128 B 100 General ..........................................................................141
DET NORSKE VERITAS

9. Amended October 2008 Offshore Standard DNV-OS-F101, October 2007
see note on front cover Contents – Page 9
C. Generic ECA for Girth Welds D 500 Welding procedure specification .................................. 169
Subject to Strains Less than 0.4% D 600 Welding procedure specification for repair welding .... 169
Assessed According to ECA Static – Low ......................... 143 D 700 Contents of pWPS......................................................... 169
C 100 General.......................................................................... 143 D 800 Essential variables for welding procedures .................. 170
D. Generic ECA for Girth Welds Subjected to Strains Equal to E. Qualification of Welding Procedures .................................172
or Larger than 0.4% but Less Than 2.25% Assessed E 100 General.......................................................................... 172
According to ECA Static – High ........................................ 145 E 200 Repair welding procedures ........................................... 173
D 100 General.......................................................................... 145 E 300 Qualification of longitudinal and
girth butt welds welding procedures ............................ 173
E. Girth Welds under Strain-based Loading Assessed According E 400 Qualification of welding procedures for
to ECA Static - Full ............................................................ 148 corrosion resistant overlay welding .............................. 175
E 100 General.......................................................................... 148 E 500 Qualification of procedures for Pin Brazing and
E 200 Assessment methodology ............................................. 149 Aluminothermic welding of anode leads...................... 176
E 600 Qualification of welding procedures
F. Girth Welds Assessed for temporary and permanent attachments
According to ECA Fatigue ................................................. 151 and branch welding fittings to linepipe ........................ 176
F 100 General.......................................................................... 151 E 700 Qualification of welding procedures for structural
F 200 High-cycle fatigue......................................................... 152 components ................................................................... 177
F 300 Low-cycle fatigue ......................................................... 152 E 800 Qualification of welding procedures for
hyperbaric dry welding ................................................. 177
G. Testing Requirements ......................................................... 152
G 100 General.......................................................................... 152 F. Examination and Testing for
G 200 Straining and ageing ..................................................... 153 Welding Procedure Qualification .......................................177
F 100 General.......................................................................... 177
H. ECA Validation Testing ..................................................... 154 F 200 Visual examination and non-destructive testing
H 100 General.......................................................................... 154 requirements ................................................................. 178
F 300 Testing of butt welds .................................................... 178
App. B Mechanical Testing and Corrosion Testing ... 156 F 400 Testing of weld overlay ................................................ 179
F 500 Testing of pin brazing and aluminothermic welds ...... 180
F 600 Testing of welds for temporary and permanent
A. Mechanical Testing and Chemical Analysis ..................... 156 attachments and branch outlet fittings to linepipe ........ 180
A 100 General.......................................................................... 156
A 200 General requirements to selection and preparation of G. Welding and PWHT Requirements ....................................180
samples and test pieces ................................................. 156 G 100 General.......................................................................... 180
A 300 Chemical analysis ......................................................... 156 G 200 Production welding, general requirements ................... 180
A 400 Tensile testing ............................................................... 156 G 300 Repair welding, general requirements .......................... 181
A 500 Charpy V-notch impact testing ..................................... 157 G 400 Post weld heat treatment............................................... 182
A 600 Bend testing .................................................................. 157 G 500 Welding of pipeline girth welds ................................... 182
A 700 Flattening test................................................................ 158 G 600 Welding and PWHT of pipeline components............... 183
A 800 Drop weight tear test..................................................... 158
A 900 Fracture toughness testing ............................................ 158 H. Material and Process Specific Requirements .....................183
A 1000 Specific tests for clad and lined linepipe ...................... 159 H 100 Internally clad/lined carbon steel and
A 1100 Metallographic examination and hardness testing........ 159 duplex stainless steel..................................................... 183
A 1200 Straining and ageing ..................................................... 160 H 200 13Cr martensitic stainless steel..................................... 184
A 1300 Testing of pin brazings and aluminothermic welds ...... 161 H 300 Pin brazing and aluminothermic welding ..................... 185
B. Corrosion Testing ............................................................... 161 I. Hyperbaric Dry Welding ....................................................185
B 100 General.......................................................................... 161 I 100 General.......................................................................... 185
B 200 Pitting corrosion test ..................................................... 161 I 200 Qualification and testing of welding personnel for
B 300 Hydrogen Induced Cracking test .................................. 161 hyperbaric dry welding ................................................ 185
B 400 Sulphide Stress Cracking test ....................................... 161 I 300 Welding processes for hyperbaric dry welding ............ 186
I 400 Welding consumables for hyperbaric dry welding....... 186
App. C Welding.............................................................. 165 I 500 Shielding and backing gases for
hyperbaric dry welding ................................................. 186
A. Application ......................................................................... 165 I 600 Welding equipment and systems for hyperbaric dry
A 100 General.......................................................................... 165 welding ......................................................................... 186
A 200 Welding processes ........................................................ 165 I 700 Welding procedures for hyperbaric dry welding .......... 186
A 300 Definitions .................................................................... 165 I 800 Qualification welding for hyperbaric dry welding ....... 187
A 400 Quality assurance.......................................................... 165 I 900 Qualification of welding procedures for
hyperbaric dry welding ................................................. 187
B. Welding Equipment, Tools and Personnel ......................... 165 I 1000 Examination and testing ............................................... 187
B 100 Welding equipment and tools ....................................... 165 I 1100 Production welding requirements for dry hyperbaric
B 200 Personnel....................................................................... 166 welding ......................................................................... 187
B 300 Qualification and testing of welding personnel for
hyperbaric dry welding ................................................ 166 App. D Non-Destructive Testing (NDT) ...................... 189
C. Welding Consumables........................................................ 166 A. General................................................................................189
C 100 General.......................................................................... 166 A 100 Objective....................................................................... 189
C 200 Chemical composition .................................................. 167 A 200 Applicability of requirements ....................................... 189
C 300 Mechanical properties................................................... 167 A 300 Quality assurance.......................................................... 189
C 400 Batch testing of welding consumables for A 400 Non-destructive testing methods .................................. 189
pipeline girth welds....................................................... 167 A 500 Personnel qualifications................................................ 189
C 500 Shielding, backing and plasma gases............................ 168 A 600 Timing of NDT ............................................................. 190
C 600 Handling and storage of welding consumables ............ 168
B. Manual Non-Destructive Testing
D. Welding Procedures............................................................ 168 and Visual Examination of Welds ......................................190
D 100 General.......................................................................... 168 B 100 General.......................................................................... 190
D 200 Previously qualified welding procedures...................... 168 B 200 Radiographic testing of welds ...................................... 190
D 300 Preliminary welding procedure specification ............... 169 B 300 Manual ultrasonic testing of welds in C-Mn/low alloy steel
D 400 Welding procedure qualification record ....................... 169 with C-Mn/low alloy steel weld deposits ..................... 191
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10. Offshore Standard DNV-OS-F101, October 2007 Amended October 2008
Page 10 – Contents see note on front cover
B 400 Manual ultrasonic testing of welds with CRA App. E Automated Ultrasonic Girth Weld Testing ... 223
(duplex, other stainless steels and nickel alloy steel)
weld deposits.................................................................194 A. General................................................................................223
B 500 Manual magnetic particle testing of welds ...................195 A 100 Scope.............................................................................223
B 600 Manual liquid penetrant testing of welds ......................196 A 200 References.....................................................................223
B 700 Manual eddy current testing of welds ...........................196
B 800 Visual examination of welds.........................................197 B. Basic Requirements ............................................................223
B 900 Acceptance criteria for manual non-destructive testing of B 100 General ..........................................................................223
welds with nominal strains < 0.4% and no ECA ..........197 B 200 Documentation ..............................................................224
B 1000 ECA based non-destructive testing acceptance criteria for
pipeline girth welds .......................................................197 B 300 Qualification..................................................................224
B 1100 Repair of welds .............................................................200 B 400 Ultrasonic system equipment and components.............224
B 500 Calibration (reference) blocks.......................................225
C. Manual Non-destructive testing and Visual Examination of B 600 Recorder set-up .............................................................226
Plate, Pipe and Weld Overlay............................................. 200 B 700 Circumferential scanning velocity ................................226
C 100 General ..........................................................................200 B 800 Power supply.................................................................226
C 200 Plate and pipe ................................................................201 B 900 Software ........................................................................226
C 300 Weld overlay .................................................................201 B 1000 Reference line, band position and coating cut-back .....226
C 400 Visual examination ......................................................202 B 1100 Reference line tools.......................................................226
C 500 Residual magnetism ......................................................202 B 1200 Operators.......................................................................226
C 600 Acceptance criteria for manual non-destructive testing of B 1300 Spares ............................................................................226
plate, pipe and weld overlay .........................................202 B 1400 Slave monitors...............................................................226
D. Non-destructive Testing and Visual Examination of C. Procedure ............................................................................227
Forgings .............................................................................. 203 C 100 General ..........................................................................227
D 100 General ..........................................................................203
D 200 Ultrasonic and magnetic particle testing of C-Mn and D. Calibration (Sensitivity Setting) .........................................227
low alloy steel forgings .................................................203 D 100 Initial static calibration..................................................227
D 300 Ultrasonic and liquid penetrant testing of D 200 Gate settings..................................................................227
duplex stainless steel forgings.......................................204 D 300 Recording Threshold.....................................................228
D 400 Visual examination of forgings.....................................205 D 400 Dynamic calibration......................................................228
D 500 Acceptance criteria for forgings....................................205 D 500 Recording of set-up data ...............................................228
E. Non-destructive Testing and Visual Examination of E. Field Inspection ..................................................................228
Castings .............................................................................. 205 E 100 Inspection requirements ................................................228
E 100 General ..........................................................................205 E 200 Operational checks........................................................229
E 200 Ultrasonic and magnetic particle testing of C-Mn and E 300 Adjustments of the AUT system...................................230
low alloy steel castings .................................................205
E 300 Ultrasonic and liquid penetrant testing of F. Re-examination of Welds ...................................................230
duplex stainless steel castings .......................................206 F 100 General ..........................................................................230
E 400 Radiographic testing of castings ...................................207
E 500 Visual examination of castings .....................................207 G. Evaluation and Reporting ...................................................230
E 600 Acceptance criteria for castings ....................................207 G 100 Evaluation of indications ..............................................230
G 200 Examination reports ......................................................230
F. Automated Non-Destructive Testing.................................. 207 G 300 Inspection records .........................................................230
F 100 General ..........................................................................207
F 200 Documentation of function and operation ....................208 H. Qualification .......................................................................230
F 300 Documentation of performance ....................................208
F 400 Qualification..................................................................208 H 100 General ..........................................................................230
F 500 Evaluation of performance documentation ...................208 H 200 Scope.............................................................................230
H 300 Requirements ................................................................230
G. Non-Destructive Testing at Plate H 400 Variables .......................................................................231
and Coil Mill....................................................................... 208 H 500 Qualification programme ..............................................231
G 100 General ..........................................................................208 H 600 Test welds .....................................................................231
G 200 Ultrasonic testing of C-Mn steel and CRA plates.........208 H 700 Qualification testing .....................................................231
G 300 Ultrasonic testing of CRA clad C-Mn steel plate ........209 H 800 Reference destructive testing ........................................232
G 400 Alternative test methods................................................209 H 900 Analysis.........................................................................233
G 500 Disposition of plate and coil with H 1000 Reporting.......................................................................233
unacceptable laminations or inclusions.........................209
G 600 Visual examination of plate and coil.............................209 I. Validity of Qualification.....................................................233
G 700 Acceptance criteria and disposition of surface I 100 Validity..........................................................................233
imperfections.................................................................209 I 200 Essential variables.........................................................233
H. Non-Destructive Testing J. Determination of Wave Velocities
of Linepipe at Pipe Mills .................................................... 209 in Pipe Steels.......................................................................233
H 100 General ..........................................................................209 J 100 General ..........................................................................233
H 200 Suspect pipe ..................................................................210 J 200 Equipment .....................................................................233
H 300 Repair of suspect pipe ...................................................211 J 300 Specimens .....................................................................234
H 400 General requirements for automated NDT systems ......211 J 400 Test method...................................................................234
H 500 Visual examination and residual magnetism ................213 J 500 Accuracy .......................................................................234
H 600 Non-destructive testing of pipe ends not tested by J 600 Recording ......................................................................234
automated NDT equipment ...........................................214
H 700 Non-destructive testing of pipe ends.............................214 App. F Requirements for Shore Approach
H 800 Non-destructive testing of seamless pipe......................215
H 900 Non-destructive testing of HFW pipe ...........................215 and Onshore Sections...................................................... 235
H 1000 Non-destructive testing of CRA liner pipe ...................216
H 1100 Non-destructive testing of lined pipe ............................216 A. Application .........................................................................235
H 1200 Non-destructive testing of clad pipe .............................217 A 100 Objective .......................................................................235
H 1300 Non-destructive testing of SAWL and SAWH pipe .....218 A 200 Scope and limitation......................................................235
H 1400 Manual NDT at pipe mills ............................................220 A 300 Other codes ..................................................................235
H 1500 Non-destructive testing of weld repair in pipe .............222 A 400 Definitions.....................................................................235
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11. Amended October 2008 Offshore Standard DNV-OS-F101, October 2007
see note on front cover Contents – Page 11
B. Safety Philosophy ............................................................... 236 D 300 Design loads.................................................................. 238
B 100 General.......................................................................... 236 D 400 Design criteria............................................................... 238
B 200 Safety philosophy ......................................................... 236
B 300 Quantification of consequence ..................................... 236 E. Construction........................................................................239
E 100 General.......................................................................... 239
C. Design Premise ................................................................... 237 E 200 Linepipe ........................................................................ 239
C 100 General.......................................................................... 237
C 200 Routing ......................................................................... 237 E 300 Components and assemblies ......................................... 239
C 300 Environmental data ....................................................... 237 E 400 Corrosion protection & coatings................................... 239
C 400 Survey ........................................................................... 237
C 500 Marking......................................................................... 238 F. Operation ............................................................................239
F 100 General.......................................................................... 239
D. Design................................................................................. 238
D 100 General.......................................................................... 238 G. Documentation....................................................................239
D 200 System design ............................................................... 238 G 100 General.......................................................................... 239
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12. Offshore Standard DNV-OS-F101, October 2007 Amended October 2008
Page 12 – Contents see note on front cover
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13. Amended October 2008 Offshore Standard DNV-OS-F101, October 2007
see note on front cover Sec.1 – Page 13
SECTION 1
GENERAL
A. General the protection of the environment.
— provide an internationally acceptable standard of safety
A 100 Introduction for submarine pipeline systems by defining minimum
101 This standard gives criteria and guidance on concept requirements for concept development, design, construc-
development, design, construction, operation and abandon- tion, operation and abandonment
ment of Submarine Pipeline Systems. — serve as a technical reference document in contractual
matters between Purchaser and Contractor
A 200 Objectives — serve as a guideline for Designers, Purchaser, and Con-
201 The objectives of this standard are to: tractors.
— Ensure that the concept development, design, construc- A 300 Scope and application
tion, operation and abandonment of pipeline systems are 301 The scope and applicability of this standard is given in
safe and conducted with due regard to public safety and Table 1-1.
Table 1-1 Scope and application summary
General
Systems in the petroleum and natural gas industries are in general described in this table.
For submarine pipeline systems that have extraordinary consequences, the quantification of con-
sequences by the three safety classes provided in this standard may be insufficient, and higher
safety classes may be required.1
Phases Concept development, design, construction, operation and abandonment
Pipeline Types Dynamic risers and compliant risers are covered by DNV-OS-F201 Dynamic Risers.
Rigid metallic pipe
Single systems, pipeline bundles of the piggyback type and pipeline bundles within an outer pipe2
Extent
Pressure and flow Pipeline system in such a way that the fluid transportation and pressure in the submarine pipeline
system is well defined and controlled 3
Concept development, design, Submarine pipeline system 4
construction, operation
and abandonment
Geometry and configuration
Dimensions No limitation
(Explicit criteria for local buckling, combined loading are only given for straight pipes with
15 < D/t2 < 45)
Water depth No limitation, see Sec.5 A201
Loads
Pressure No limitation
Temperature No limitation
Material properties need to be documented for temperatures above 50oC and 20oC for C-Mn
steels and CRAs respectively, see Sec.5 C300
Global deformations No limitation
Linepipe Material
General Sec.7 A201
C-Mn steel linepipe is generally conforming to ISO 3183 Annex J but with modifications and
amendments.
CRA linepipe with specific requirements to duplex stainless steel and 13Cr martensitic steel
Clad and Lined linepipe.
Supplementary requirements for sour service, fracture arrest properties, plastic deformation,
dimensional tolerances and high utilization.
Components Bends, Fittings, Flanges, Valves, Mechanical connectors, CP Insulating joints, Anchor flange,
Buckle arrestor, Pig traps, Clamps and Couplings
Material and manufacture Sec.8
Design Sec.5 F
Fluids
Categories Table 2-1
Sour service Generally conforming to ISO 15156
Installation
Sec.10
Method S-lay, J-lay, towing and laying methods introducing plastic deformations
Installation requirements for risers as well as protective and anchoring structures are also
included.
1) Example of extra ordinary consequences may be pristine environment 2) Umbilicals intended for control of subsea installations are not included in
and exploration in arctic climate. this standard. Individual pipes, within an umbilical, made of materials
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