Socket welding fittings Describe: Socket welding fittingsThe socket welding fittings we supplied as following standards: British system seriesMetric ... steel, low-temperature steel, monel and nickel alloy.The socket welding fittings include: 90°Elbow, 45°Elbow, Socket weld tee, ... end cap, Socket-welded half coupling, High pressure boss,Welding boss, 45°Mitre boss, Union, Socket reducing insert MSS ...