... , MSS, HG, DIN, JIS, GB socket welded long radius elbow Socket welded elbows is a type of socket welded fitting that is unthreaded, but ... .2. Standard: ASME, MSS, HG, DIN, JIS, GB3. Type: 90° and 45° Socket Welded ElbowWe offer Sanitary Fittings, Stainless Steel Sanitary Fittings ... butt-welded joints due to the lack of exacting fit-up requirements and elimination of special machining for butt weld end ...