... C carbon steel flange 5.API,CE,ISO A105 ASME B16.9 carbon steel flange ... , HG,QOST,ETC.CE and certification:ISO9001:2000 , API , BV , SGS, LOIYDApplications range: Petroleum, chemical, ... , HG,QOST,ETC.CE and certification:ISO9001:2000 , API , BV , SGS, LOIYDApplications range: Petroleum, chemical, ... DIN, BS,GB, SH, HG,QOST,ETC. ASME B16.11ISO9001:2000 , API , BV , SGS, LOIYDApplications range: Petroleum, ...