... /PN6,PN10,PN16,PN20,PN25,PN40/ Class A, B, C, D, EstandardASME B16.5, ASME B16.47, ASME B16.36, ... AQSIQ , passed the Authentication of API and became a member of first – grade supply network of State ... the requirement of customer1.ANSI FLANGESStandard: ANSI B16.5;ANSI B16.47;MSS SP44;ANSI B16.36 ... Flanges(GOST12821-80); Steel Butt-Welded Flanges GOST12821-80Pressure Class:PN=0.6--PN10,0 (100 /2)SIZE: ...