... seamless, buttweld fittings,elbow,tee,reducer,cap,bend,crossWe supply carbon steel pipe fittings of different standards.STANDARDS: ANSI B16.9 ASTM ... ,SCH80,SCH100,S , CH120,SCH160,XS,XXS,SGP, ETC.carbon steel butt welded seamless Caps is usually used for protecting the ... The ends may be machined for butt welding , threaded , or socketed , so the carbon steel elbows are consist of butt weld,thread elbow ...