1) Product:Seamless steel pipe 2) High quality (ISO 9001, API 5L ) ... to 219mm*25mm (Length:2-14m) Seamless stainless steel tubesMain material:TP304/304L, TP316/316L TP321/321H, ... : 4-325mm WT: 0.5-25mm Seamless carbon steel tubesMain material:Gr.A, Gr.B, X42, X46 ... ST37, ST44, ST52, ect. Standard:A519, A53, A106, A213; API5L; JISG3452, JISG3454, JISG3441, JISG3444, JISG3461, JISG3462; DIN17175, DIN1629; ...