Standard Steamless Steel Pipe1,Website:http://www.sinosteelpipes.com,Specification: Material: 1, ASTM A53, A106, A210, A252, A333 etc;2, X42 ... non-oiled, dry.Standard seamless steel pipeToleranceOD: +/-5%; Thickness: +/-5%; Length: +/-10%.StandardGB/T3091, BS1387-1987, ASTM A53, DIN2440, ... .Main Material: (Carbon Steel & Low Alloy steel)1, ASTM A53, A106, A210, A252, A333 etc; 2, X42, X46, ...