... ,JIS,GB/T12459TechniqueForged or Casting. MaterialCarbon steel:ASTM A234 WPB, WPC,ASTM A105 WPB;ASTM A106 reducer;ASTM A350,DIN St37.0, St45.8 ... , St52.4,St.35.8/I.API 5L GR.B, X42,ASTM A860,ASTM ... A694,ASTM A420 WPL6, WPL3We can produce according to materials appointed ...