... GB/T12459 , MSS SP-43, DIN , JIS. 5) Material: Stainless steel (304/304L, 316/316L, 317L,321, 321H, 310S, 347H , ... DUPLEX2205, S31803,904L,)6) Applications range: For use in the petroleum, smelting, foodstuff, power, papermaking, chemical, medical equipment, ... boiler heat exchanger, and other fields. 7). Inspection: factory in-house or Third Party inspection available upon requests.*We can ...