... steel pipe, line pipe, precision steel pipe, chemical fertilizer pipe, Hydraulic prop tube, thick-walled steel pipe, oxygen tube, structure steel pipe, spiral steel pipe, oil casing pipe, thin-walled steel pipe, small-diameter steel pipe, large-diameter steel pipe ... . thickness 1mm-100mm3. standard GB BS AMSE ANSI ... steel sheet; 321,316 L, 316Ti, 316,304 L, 304, 301,202,201, etc. API 5L steel pipe ...