... /EN/ST/GOST 4.Got the ISO 9001 A106 steel ERW pipe fitting1.material:a234 wpb,a105,a106,a532.Size:1/4 ... :welding7.Surface treatment: painting,lettering,polishing.1.Our Product Range (pipe fittings) : 180 Returns 90 and 45 Elbows , Concentric Reducers,Eccentric ... , Caps,Flanges. BW, SW & Threaded : seamless/erw in carbon, alloy, stainless steel,duplex,as per ASTM, ANSI, JIS, DIN and GB standards ...