Grade of steel: B, X42, X52, X80, ALLOY STEEL Standards applied: API SPEC 5L Size: O.D.: 8-630mm W.T.: 1.5-35mm Standards: GB/T8163-1999, GB3087-1999, GB5310-1995, GB6479- 2000, GB994-1988 Materials: 20#, 45#, 16Mn, 27SiMn, 12Cr1MoV, 15CrMo, 10CrMo910, Cr5Mo, WB36 We can supply the products in a high quality and competitive price
