... :high quality,low price,multi-standardCertificate:ISO9001:2000,CE.Size: 1/2"-48"Material: stainless steel,carbon steel, ... API,GB,ectProcess: Cold Draen,Cold Rolled,EFW,ERW,Hot Rolled,SAW.and so on.Structure type: seamless ... 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