... 2"-48" Thickness: SCH10-SCH160,SGP,STD,XS,XXS Standard: ASTM,DIN,BS Material:ASTM A234 WPB ASTM A106 ... seamless pipe with good quality :high quality,low price,multi-standardCertificate ... and exportor of flange,valve and pipe fitting.With the rich experience of making and exporting flanges, ... questions. ASTM A105 Carbon Steel seamless pipe with standard size