Incorporating The ASME BPE Guidelines For CIP For Biopharma Equipments
1. Incorporating the ASME - BPE
guidelines for designing the
Cleaning In Place of Bio Pharma
Equipment
Vishal Wagh
Director Marketing
adam fabriwerk pvt ltd
Mumbai, India
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2. Summary
The CIP System
CIP of Vessel
Spray Devices
Tank Nozzle design for CIP
Vessel Design Features
Process Line Design for CIP
Drainability
Dead Legs
Complexity of Design for CIP
Machined Block Valves
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5. Spray Devices
Fixed devices provide 5-7 feet of coverage from the device
Flow typically ≥2.5 GPM / foot (31 lpm / meter) tank circumference
Example: tank diameter = 3 feet,
Spray ball flow = π x 3 ft x 2.5 gpm/ ft ≥24 GPM
Spray device design criteria
Provide adequate flow for operation
Must be self-draining
MOC compatible with cleaning agents
SS with finish equal to the tank
Commonly solution directed to upper 25-30% of tank
Coverage of lower surfaces by sheeting
Must provide 100% coverage of tank internals
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6. Tank Nozzle Design for CIP
Minimize L/D (2:1 target
ratio) to ensure coverage
from spray balls
Recommended minimum nozzle size:
1”ASME, BPE 2007
Prefer nozzles flush with interior of
vessel
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7. Tank Nozzle Design for CIP
L/A (Length / Annular width) ≤2 for nozzles with
dip tubes, splash tubes, or other inserted lines.
NOT ACCEPTABLE
.
ACCEPTABLE
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8. Tank Nozzle Design for CIP
Vessel Sidewall Fittings
Avoid nozzles that extend from the vessel wall below spray devices (e.g. hygienic
ferrules). These may not be cleanable. Recommended minimum slope is 5°ASME-BPE
2007
. . .
INSTRUMENT HYGIENIC BOLTED HYGIENIC
PORT FERRULE FITTING
. .
Ingold Port – Difficult to .
susceptible to clean below NA Connect
leakage around level of spray
O ring ball
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9. Tank Nozzle Design for CIP
Vessel Sidewall Fittings
NA Connect on vessel side wall with accessories like Sampling
valve, Temperature sensor, DPT can be fitted
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10. Vessel Design Features
Smooth surface –
rounded corners
Aids soil removal, does not
harbor microorganisms
Typically 15-20 micro inch
roughness after EP
Appurtenances selected and
installed for drainability
Must drain freely
bottom agitator pads
drain valves
Minimize number of shell
nozzles
L/D ≤2
Dished man way covers
with minimum projection.
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11. Process Line Design for CIP
Flow rate requirement to
flood process lines to ensure
Cleaning In Place
Use of Sanitary Flow meters
in CIP supply line to ensure
desired flow rates
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12. Drainability - Slope
Maintain slope after installation
Supports essential to maintain slope
Ensure lines will not slip through supports
Maintain slope during CIP and SIP
Thermal expansion can change slope
Challenging for flexible hose assemblies:
Coefficient of thermal expansion for polymers is often >10x stainless steel
May sag when heated
Often requires aggressive slope to ensure no low Points
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13. Drainability - Connections
Welds preferred
Hygienic union fittings
Often required for access, maintenance, assembly
Gaskets extrude
Limit by tightening clamps to specified torque
Challenges :
Misaligned fittings
Materials that cold flow, extrude or swell
Seals are to meet one of the following extrusion categories
Category 1: 0.025 in. (0.6mm) Category 2: 0.008 in. (0.2 mm)
Minimal liquid hold up still occurs
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14. Dead legs
Dead Leg: “An area of entrapment in a vessel or piping run that
could lead to contamination of the product
Any branch of a line through which liquid does not flow during CIP or
steam during SIP
Includes
Tees
Closed valve branches
Vessel nozzles
Target ratio: L/D ≤2 (extension from flow path / inner diameter)
(BPE 2009, SD3.11.1)
Not always practically achievable
If not, confirm successful CIP and SIP during validation
L /D > 2 often validatable for SIP depending on
Turbulent steam flow
Dimensions: Length and Diameter
Orientation
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15. Complexity of Design for CIP
Simple case of orienting a branch for CIP and SIP
Downward branches trap condensate and residue
Upward orientation is best for sterilization
Steam less dense than air
Rapid draining of condensate
But during CIP, air is not easily cleared from an
upward tee
Cleaning is more difficult than SIP
Depending on orientation and diameter even L/D = 2 may
be difficult to clean
Solutions
Minimize length of dead leg
Horizontal orientation where possible
High flow and minimal length enable flushing air from tee
Use full-diameter tees (1.5”branch for 1.5”run)
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16. Machined Block Valves
Advantages of Block
Valves
Compact Design – Low
Space requirements
Low hold up volume, small
welled area
Greatly REDUCED DEAD
LEGS
No internal weds, shorter
cleaning times
All blocks designed for
OPTIMISED DRAINING
Made to Customer
Specifications
Reduced Total Cost of
Ownership
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