... " 2.Manufacture and exporter 3.ISO9001/2000 ANSI carbon steel pipe fitting flange name carbon steel flangeFaceRF, FF, MF, MFM, RJ, TG, RTJ ... B16.47, ASME B16.36,DIN 86341-2000, DIN2505materialCarbon steel(ASTM A105,A181-60, Q235,A350LF2,A350LF3,),1.0402,1 ... Petroleum Pipline Bureau.It was recognized by China Classification Society and admitted an associator by EnergyAhead Sources Net of China Petroleum ...