3. INTRODUCTION
Petrosin Ravi Industries Ltd., which was established
in 1965. Petrosin Ravi is locatedat Kala Shah Kaku,
Lahore. Compnay is engaged in fabrication and
manufecturing of pressure vessels.
4. FABRICATION:
Fabrication is the building of structures by cutting,
bending, and assembling processes.
A system of pipes that compose a structure according
to drawing is called Piping.
PIPING
5. MATERIAL COADS
ASTM A105
Standard Specification for Carbon Steel Forgings for Piping Applications.
ASTM A234
Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy
Steel for Moderate and High Temperature Service
ASTM A106
Standard Specification for Seamless Carbon Steel Pipe for High-
Temperature Service.
ASTM A516 Gr 70
Carbon Steel Plate for Boilers and Pressure Vessels
6. HEAT NUMBER
A heat number is an identification coupon number that is stamped on a
material plate after it is removed from the ladle and rolled at a steel mill.
Numerical Significance
2 6 490
Indicated furnace number
Indicated years of melted metals
Melt number
7. Welding joins metals by melting and fusing 1, the base metals being joined
and 2, the filler metal applied.
WELDING
9. Welding positions, 1 all positions
ROD NUMBER (AWS)
E 70 1 8
Electrode
Minimum tensile strength, measured in (1000PSI).
Welding current (AC, DC, or both)
11. GTAW: Stands for gas tungsten arc welding. Most refer to it as "TIG“ welding.
GTAW
12. ROD NUMBER AWS
E R 70 S 3
Electrode
Rod
Indicates the minimum as-welded tensile strength (1000PSI)
Solid electrode wire
Chemical composition
13. Pipe is used to transport the fluid like water, oil or similar . The outside diameter
stays constant and the wall thickness increases with larger schedule number. Pipe
wall thickness is defined by the 'pipe schedule' and tube wall thickness is defined
by the 'Birmingham wire gauge' for tubes.
PIPE AND TUBE
Standards: ASME B36.10 ASME B36.19
Material: 106 Gr B
PIPE
TUBE
14. SCHEDULE ASME B36.10
Specific pipe is identified by pipe diameter and another non-
dimensional number for wall thickness referred to as the Schedule.
16. Elbow: elbow is pipe fitting which is used as connection point
between two lengths of pipe to produce change in the direction of
flow in the pipe.
Standard: ASME B16.25 Material: A234
C O E= (Tan 90/2*DIA*1.5*25.4)
ELBOW
L.R S.R
17. RDUCER
A reducer is the component in a pipeline that reduces the pipe size
from a larger to a smaller.
Standard: ASME (B16.9) Material: A 234
18. TEE
Pipe Tee is a type of pipe fitting which is T-shaped having two outlets,
at 90° to the connection to the main line
Standard: ASME B16.9 Material: A234
34. VORTEX BREAKER
A vortex breaker is a device used in engineering to stop the
formation of a vortex when a fluid (liquid or gas) is drained
from a vessel.
39. NDT
Dye Penetrant Inspection:
Dye penetrant inspection is a widely applied and low-cost inspection
method used to locate surface-breaking defects in all non-
porous materials (metals, plastics, or ceramics).
40. NDT
Radio Graphic Test:
Radiographic Testing is a non destructive testing (NDT) method of inspecting
materials for hidden flaws by using the ability of short wavelength electromagnetic
radiation (high energy photons) to penetrate various materials.
42. P W H T
Stress Relieving is done temperature below the critical range to
relieve the stresses resulting from cold working, shearing, or gas
cutting.
45. An ultrasonic thickness gauge is a measuring instrument for
the non-destructive investigation of a material's thickness
using ultrasonic waves.
ULTRASONIC THICKNESS GAUGE
46. N 1N 2
N 3
N 4
N 5
N 6
N 7
N 8 N 9
N
10N 11
GAS INLET
GAS OUT LET
WATER OUTLETOIL OUTLET
OIL DRAIN WTER DRAIN PSV
RAPTURE DISK
PRESSURE INDICATORTEMPRATURE INDICATOR
P.C
M1 MAN WAY
