... Professional manufacturer SO flange in China, ansi b16.5 SO, WN, bland flange(class150-1500). Size ... / Class A, B, C, D, EstandardASME B16.5, ASME B16.47, ASME B16.36,DIN 86341-2000 ... the requirement of customer1.ANSI FLANGESStandard: ANSI B16.5;ANSI B16.47;MSS SP44;ANSI B16.36 ... Class300,Class600,Class900,Class1500,Class2500SIZE: 1/2" NB TO 48" NB 2.DIN FLANGESStandard: DIN2527,DIN2566,DIN2573,DIN2576, ...