... etc. 2. Standard: ASME, MSS, HG, DIN, JIS, GB tube socket weld elbow Socket welded elbows is a type of socket welded ... is known among the customer's due to its tensile strength. These Steel Tube Fittings in various grades and finishes as ... are forgings, bars, seamless pipe, and seamless tubes which conform to the fittings chemical compositions, melting practices, and mechanical property requirements ...