... , SUS316, SUS316L, SUS321Alloy Steel: PA22, PA23,PA24, PA25, PL3804) Standards: ANSI B16.9, B16.28, DIN2605,DIN2609, DIN2615, DIN2616, DIN2617, JIS2311 ... , DIN, BS,GB, SH, HG,QOST,ETC.certification:ISO9001:2008 , API , ASME,CE, HSEApplications range: Petroleum, chemical, power, gas, metallurgy, shipbuilding ... also produce according to the customer requirement. Alloy steel Forged Elbow for Power plant