... Thickness: 5 - 30 mm 3.Material :X42 ,X52,60,X70,20#,10# 4.Standard :API 5L Features of ASTM A106-2006 SEAMLESS ... R3 Length can be manufactured by the consumer’s requirementsMaterial20# ,10# ,45#,Q345B, X42,X52,X60,X70Place of originChina mainlandSecondary ... Q345,20Cr,40Cr,12Cr 1MoGGB/T3087-1999Low-pressure Boiler Pipe10#,20#GB/T5310-1995High-pressure Boiler Pipe20G,12Cr1MoV,15CrMoGGB6479-2000Chemical ...