| CODE | COMPONENT / STAGE | CHARACTERISTICS | EXTENT OF CHECK | REFRENCE DOCUMENTS / STD | ACCEPTANCE NORMS |
|---|---|---|---|---|---|
|
1) PROCEDURE QUALIFICATION |
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1.1 |
"Welding procedure & welder qualification" |
WPS / PQR Record |
100% Review |
WPS, PQR, WPQ |
ASME Sec IX |
|
2) RAW MATERIAL INSPECTION |
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|
2.1 |
PTFE Resin |
Ensure Lot / batch no. details are available on drum |
100% Check Correlate Lot / Batch details with Manufacturer COC |
ASTM D 4895 |
Manufacturer COC |
|
2.2 |
CS Pipes, Flanges, Fittings, Valve Body/end piece & ball |
Conformity check for Chemical / Mechanical Properties |
100% Check if results given in MTC / lab report Comply with relevant material specs |
Approved Drawing / Specification |
Approved Drawing / ASTM F 1545 |
|
3) IN PROCESS / FABRICATION OF PIPES & FITTINGS (BEFORE LINING) |
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|
3.1 |
"Fabricated Pipe pool / fittings, machined castings" |
Visual / Dimensional |
100% Visual |
Approved Drawing |
Approved Drawing / ASTM F 1545 |
|
3.2 |
Weld quality check for fabricated pipes and fittings |
"DP TEST / Radiography Tests" |
"DPT - 100% for fillet/Socket Welds/Butt Welds, RT-10% of Butt Welds" Physical |
Approved Procedures |
ASME Sec V & ASME 31.3 |
|
Special Notes for Sr. No. 31. & 3.2
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4) PTFE LINER All Liners are produced using the paste extrusion technique which involves processing PTFE fine powder without use of any pigments - the color is white. On completion of Sintering process, liners are:
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5) FINAL INSPECTION FOR LINED PRODUCTS |
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|
5.1 |
Hydrostatic Test |
Physical |
100% Visual |
ASTM F 1545 |
"Procedure defined in ASTM F 1545 for Spools & fittings, EN12266-2 for Valves" |
|
5.2 |
Continuity of Lining (spark test) |
Physical |
100% Spark Test 15 KV |
ASTM F 1545 |
Procedure defined in ASTM F 1545 |
|
5.3 |
Thickness of Lining/Dimensional Check of spools |
Physical |
Flange Ends Measurement |
ASTM F 1545 |
Meet min the requirements as given in ASTM F 1545/ Approved drawing/ Specification. |
|
5.4 |
PTFE / PFA Linings |
Physical |
100% Visual |
ASTM F 1545 |
"ASTM F 1545, Cl. 5.4, workmanship" |
|
6) FINAL PACKING |
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|
6.1 |
Surface Cleaning / Paintings |
Painting before final packing |
100% Visual |
Blast Cleaning Sa 2.5 + 1 coat of Self primed Epoxy (100-125 micron) |
Visual |
|
6.2 |
Packing |
Physical |
100% STD |
Vendor Procedure |
Both ends shall be secured with wooden blinds to avoid any damage to PTFE liner. |
