1.20#,A53,A106,API 5L,ST35,ST37,ST42,ST45,STPG42 2.size DN15-DN3000 3.material:carbon steel,stainless steel,alloy ProductCarbon steel seamless pipe,Erw steel pipeStandardASTM A53,ASTM A106,API 5L,ASME B36.10M—1996, GB8163-1999, GB8162—1999, GB3087—1999, JIS,DIN and etc...Material20#,A53,A106,API 5L,ST35,ST37,ST42,ST45,STPG42Size1/2"-48"Wall ThicknessSCH20,STD,SCH40,SCH80,SCH160,XXSlength5- ...