... .Manufacture and exporter 3.ISO9001/2000 ANSI carbon steel pipe fitting flange name carbon steel flangeFaceRF, FF, MF, MFM, RJ, TG, RTJ, ... ASME B16.47, ASME B16.36,DIN 86341-2000, DIN2505materialCarbon steel(ASTM A105,A181-60, Q235,A350LF2,A350LF3,),1.0402,1 ... Authentication of API and became a member of first – grade supply network of State Power Corporation and China National Petroleum Corporation ...