... seamless, buttweld fittings,elbow,tee,reducer,cap,bend,crossWe supply carbon steel pipe fittings of different standards.STANDARDS: ANSI B16.9 ... pipe or tube allowing a change of direction,usually these carbon steel elbows distinguished by connection ends, The ends may be ... machined for butt welding , threaded , or socketed , so the carbon steel elbows are consist of butt weld,thread elbow.socket ...