... original manufacturer. We supply seamless pipe with high quality.Info. of pipes :O.D.: 1" to 8"(30mm~219mm)W.T.: sch5s to ... A315B etc. ASTM A210-A-1, A178-C, A210-C etc.ST45-4, ST42-2, ST45-8, ST52, ST52.4, ST35 etc ... . AISI 1020, SAE 1045 etc.CK22, CK45 etc.TolerateOD +1% / -1%; Thickness +12.5 ...