... Range: Seamless steel tubes/ pipes, Cold drawn steel tubes/ pipes, API SPEC 5L pipes, MATERIALCarbon Steel Tubes/PipesST 37, ASTM A106 Gr B; A53, A210; API 5L X42 ... , X46, X52, X56, X60, X65, X70, X80 1"~48" ASTM A105 CARBON STEEL PIPE SEAMLESS