... FOB Tianjin port price 3.API/ISO certification carbon steel elbowsProfessional manufacturer(32years) WT:SCH5~SCH160 Standard:ASME,ANSI ... WP316/316L, WP321, WP347, WPS 312545 DUPLEX & SUPERDUPLEX STAINLESS STEEL ASTM A 815 UNS S31803, UNS S32750, UNS S32760 STANDARDSANSI ... , DIN, BS,GB, SH, HG,QOST,ETC.CE and certification:ISO9001:2000 , API , BV , SGS, CEApplications range: Petroleum, chemical, power, ...