... .Thickness: 5 - 30 mm 3.Material :X42 ,X52,60,X70,20#,10# 4.Standard :API 5L Features of ASTM A106-2006 ... SEAMLESS CARBON STEEL pipe: Production namesseamless carbon steel pipeOutside diameter1/2”to 3" and ... #,Q345,20Cr,40Cr,12Cr 1MoGGB/T3087-1999Low-pressure Boiler Pipe10#,20#GB/T5310-1995High-pressure Boiler Pipe20G,12Cr1MoV,15CrMoGGB6479-2000Chemical Fertilizer ...