... , 1500Lbs, 2500Lbs,Etc /PN6,PN10,PN16,PN20,PN25,PN40/ Class A, B, C, D, EstandardASME B16.5, ASME B16.47, ASME B16 ... equipments from AQSIQ , passed the Authentication of API and became a member of first – grade supply network of State Power Corporation ... , surface treatment:anti-corrosive oil,black painted,as per customer's request.4,high-temperature resistant with black painting.5,marking ...