... : ASME, MSS, HG, DIN, JIS, GB 90 degree socket weld elbow Socket welded elbows is a type of socket welded fitting that is unthreaded, but has large ... quarter bend.1. Material: 304, 304L, 321, 316, 316L, etc.2. Standard: ASME, MSS, HG, DIN, JIS, GB3. Type: 90° and 45° Socket ...