STEEL COUPLING 1) Materials: 304, 304L, 316, 316L, 321 2) Forming type: mandrel-forming 3) Standards: ASME B16.9,MSS SP-43 Steel ... : 304, 304L, 316, 316L, 321 2) Forming type: mandrel-forming 3) Standards: ASME B16.9,MSS SP-43,DIN 2605,JIS ... reply! Ordering1) Pipe size2)Thickness3)Thread type4)Finish5)Quantity Steel Coupling