... steel pipe cracking and other steel pipe, etc.Cold rolling (dial the) seamless steel tube in addition to general steel tube, low ... than 32 mm, wall thickness 2.5-75 mm, cold rolling seamless steel tube diameter can to 6 mm in, wall thickness ... is less than 0.25 mm, cold hot rolling size than high precision.Generally with the seamless steel tube: is 10, 20 ...