PIPING MATERIAL SPECIFICATION (PMS)

GAIL (INDIA) LTD NEW DELHI PIPING MATERIAL SPECIFICATION SPECIFICATION REV-0 GAIL/PMS/SP-01 Page 1 of 27 PIPING MATERIAL SPECIFICATION (PMS) GAIL (INDIA) LTD NEW DELHI PIPING MATERIAL SPECIFICATION SPECIFICATION REV-0 GAIL/PMS/SP-01 Page 2 of 27 TABLE OF CONTENTS SCOPE CODES AND STANDARDS MATERIAL SPECIFICATIONS PIPELINE PIPES FITTINGS BENDS FLANGES GASKETS BOLTING AND THREADS THREAD SEALANT VALVES QUICK OPENING END CLOSURE HYDROTESTING VENTS AND DRAINS PIPELINE SPECIALITY ITEMS ATTACHMENTS ANNEXURE A- PMS 150# CLASS ANNEXURE B- PMS 300# CLASS ANNEXURE C- PMS 600# CLASS GAIL (INDIA)

8.3 Neck of weld neck (WN) flanges shall suit pipe bore and thickness. 8.4 Bore of socket welded (SW) flanges shall suit pipe O.D. and its thickness. 8.5 Threads for screwed flanges, if used, shall conform to American Standard taper as per ASME B 1.20.1 NPT. 8.6 Sizes for blind flanges shall be indicated by nominal pipe size.

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