材质要求 1valves body: from carbon steel acc to : ASTM A216 WCB 2Flanges: manufacture acc to : ASTM A105 ANSI B16.5 3Internal parts for valves: acc to ASTM A182 F6 4Bolts: ASTM 193 GR .B7M(cad plated ) 5 NUT: ASTM 194 2HM(cad plated) 6 Gasket: from : spiral wound, Teflon filled with 304 ss winding 7each valve should be completed with two weld neck flanges ANSI B16.5 SCH40. Studs/nuts Acc to ASTMA-193GR-B7M/ASTM- A194GR-2HM(cad plated) and casketsspiral wound Teflon field With 304SS winding |