Hebei Canghai Nuclear Equipment Technology Co.Ltd. has more than 20 years of experience in the professional production of Spiral welded pipes.Tolerance (Mm)：Width±0.02; Thickness±0.02; Wall Thickness±0.02; Inner Rib Thickness±0.02; R Thickness At Both Ends±0.02;Production Process:hot-rolled and cold-drawn.Grade：SS400, Q235, Q345, Q460, A572 Gr.50, A572 Gr.60, S235, S275, S355, Grade A/B, X42, X52,X60, X70, etc.Pipe end：Plain end, beveled end, PVC covered and both ends capped ,threaded and coupled.Feature of Spiral welded pipes：High strength, can withstand greater pressure.