Document Y9jEG1xkR6wEYLJBkvLD3RpO0

Engineering Standard id.3.i Materials and Standards .Section* Pittsburgh SEALANTS, GENERAL DESIGN CUIOELtteS PAGE 1 1983-01 :ets ano TEMF>ERATufit shall not be less than tfc m-metallic caskets MAXIMUM operating fluid pressure and temperature within tic system. ite paste with IM1CAL CO. ;th teflon- jet LUBE INC. to.SPEC.TT-S-1732) 300 - SHEETS 9S0 - RING CASKET 3200 WITH SBR (ASBESTOS FREE) 5.125111 WC wypgo ANALYSIS is required for these services. SUPPORTSJiiC2..ft5..5ER2,' hangers, anchors, and cuioes SHOULD BE OESICNEO to SUIT THE SPECIFIC SITUATION. PROVISIONS SHALL BE HACE TO CONTAIN OR SAFELY RELIEVE ANY EXCES SIVE PRESSURE TO WICH THE SYSTEM MAY BE SUBJECTEO, l.E. AMBIENT INFLUENCES. FIRE. IMPROPER OPERATIONS. FAILURE OF CONTROL DEVICES. RfffER Tg ALCOA STANDARD 30.3 FOR PIPE INSULATION SELECTION CRITERIA. ^Elfn?E5vi,c|TsSlc25,1,cations ARfrod above crouno installations. IL.P.,K5?L2yfT.4!i-r?SyTE9 underground, it must be protected with lSTTSAiN5D>A2R2D22SN^3S3R.7ic.191?T.1INSANiDAS33.c8a.itlhTold.ic protection per alcoa ALL DESIGN. MATERIALS. FABRICATION, AND INSPECTION SHALL BE IN ACCORDANCE WITH ANSI 831.1, THE POWER PIPING CODE, OR PLANT. PETROLEUM-REFINERY CODE DEPENDING ON AREA OF APPLICATION. NOTES 1. SEVERAL VALVE TRIM MATERIALS ARE AVAILABLE. BUT NOT LISTED HERE. I^YtSS2dt.S22SICEREC' F0P PROPER APPLICATION TO FLUIDS. PRESSURES. AND TEMPERATURES. 2. CAST IRON ANO MALLEABLE IRON FITTINGS HAVE LOW OUCTILITY AND SHOULD NOT BE USEO WHERE SHOCK LOADING OR BRITTLE FRACTURE 252 e!?22,42irED r0-2mpsi wscf malleable iron to BESTOS KITH LEX ITAU. IC STYLE O. AINLESS STEEL TH HOLDINC RING- PRESSURE RATING CLASS. BESTOS WITH LEXITALLIC UIT FLANGE CLASS. THEEO t CO'S. (EAT *2900 <itallic style 3- SKSSS'feffSS ISK! igrf:,,<ws "0T BE usro 4. ALWAYS SPECIFY BORE (PIPE 1.0.) FOR HELD NECK FLANGES WHEN OROERINC. 5. USE FLAT FACE FLANGES ANO FULL FACE CASKETS WHEN MATING AGAINST A CAST IRON FLANGE. 6. NO COPPER. BRASS OR NON-FERROUS ALLOY SHALL BE USED FOR VALVES OR VALVE COMPONENT THAT MIGHT CONTACT AN AMMONIA OR CAUSTIC ATMOSPHERE. 7. REFER TO ENGINEERING STANOAROS 19.0.ii 18.8.2, 18.8.3 AM) 18.8.4 FOR SAFETY ASPECTS REGAROINQ LPQ. 8. ALL GATE ANO GLOBE VALVES TO HAVE BOLTED BONNETS. BUTT HELO ENOS. STEM ANO SEATINC OF 410 STAINLESS STEEL ANO TO HAVE AN OUTSJOE STEM ANO YOKE C0.S.4Y.). THIS IS TO AVOID STEM CORROSION ANO TO ALLOW DETERMINATION IF VALVE IS OPEN OR CLOSED FROM A OISTANCE. 3. SLIP-ON FLANGES ARE NOT RECOMMENOEO FOR SERVICE ABOVE ANSI CLASS 300 RATING OR FOR FLAMMABLE FLUIOS OR FOR CYCLIC SERVICES. 10. BRANCH CONNECTIONS SHALL BE CHECKED FOR REINFORCEMENT REQUIRE MENTS OF ANSI B31.1. 11. PREHEAT ANO POST-HEAT STALL BE IN ACCORDANCE WITH ANSI 031.1. 12. PROLONGED EXPOSURE TO TEMPERATURE ABOVE 77S F. THE CARBIDE PHASE OF CARBON STEEL, MAY BE CONVERTED TO GRAPHITE. 13. VALVE SHALL HAVE A PRESSURE SEAL BONNET. 14. ISO* BALL VALVE, A LUBRICATED OR NON-LUBRICATED PLUG VALVE. ASTM A-216 GR.HC8. 15. BOLT OR STUD LENGTHS TO EXTEND NO MORE THAN THREE THREADS BEYONO THE NUT WHENEVER PRACTICAL. 16. 26- ANO LARGER 150* FLANGES HAVE SAME ORILLINO DIMENSIONS AS CLASS 125 C.l. 17. THREADS SHALL BE THE COARSE SERIES EXCEPT ALLOT BOLTING 1-1/8" DIAMETER ANO LARGER SHALL BE THE 8-PITCH - THREAO SERIES. 18. IT IS RECOMMENOEO THAT HEAT ACTIVATED, FIRE SAFE VALVES BE UTILIZEO ON FLAMMABLE L.0U10S TO ISOLATE THE POTENTIAL SOURCE OF COMBUSTION (BCILER. FURNACt) FROM THE L10U10 SOURCE (TANK. OISTRIBUT.ON HEADER) 19. THE ANSI ANO ASTM STANDARDS PROVIDE THE MOST CONSISTENT APPROACH TO VALVE SPECULATIONS ANO SELECTION. STANDARD 16.3.1.0 SERVES AS A REFERENCE TO ASSIST IN VALVE SELECTION ANO PROVIDES / STARTING POINT FOR C0MPAR1N0 FEATURES BETWEEN MANUFACTURERS. OTHER COOES ANO REFERENCES