Liaocheng Tianrui Steel Tube Limited Company Our company is a large seamless steel pipe manufacturer. The following are our leading products: Product One: (1).Product Name : Seamless Carbon Steel Pipe (2). Brand : Tian Rui Steel Pipe ( By ourself ) (3).Specification: OD10.3mm - 720mm (4) Standard :ASTM A106 GR B , ASTM A53 GR B SAE1020 SAE1045 JIS G4051 S20C JIS G4051 S45C JIS G3454 STPG370 JIS 3454 STPG42 DIN ST 45-8 DIN ST 52 (5) Tolerate: OD +1% / -1% Thickness +12.5% / -10% Length 2 0mm ... TEL : 0086+635+2111838 FAX : 0086+635+2127818 Email: wang.shaoguo@ Website : http://