... the largest share of about 80%. Usually, the different materialor wall thickness elbow choose different forming technology. At present, the manufacturer ... B16.28; DIN 2605, 2615, 2616,2617; GOST, JIS Wall thickness: 2mm to 150mm, sch10, shc20, std sch40, sch ... manufacture elbow, tee, reducer, cap, flange, cross, nipple, socket fitting, expansion joint and other series products. elbow:are widely used ...