... the bend, flange elbow, reducer elbow, tooth bend, stamping elbow inside andoutside screw, pushing elbow, socket elbow ,butt weld elbow,inside screw elbow. Our elbow through ISO 9001 ... fitting Material: carbon steel astm a234 wpb, wpc; st37.0 Standard:ANSI/ASIM B16.9, B16.28; DIN 2605, 2615, 2616 ... ,2617; GOST, JIS Wall thickness: 2mm to 150mm, sch10, shc20, std ...