... 316, 316L, 317L, 310S, 904L, etc. 3) Type: Welding neck, Socket welding, Slip-on, Threaded, Lap ... flange, elbow, pipe bend, pipe reducer, pipe tee, pipe cross, pipe nipple, pipe cap, pipe union and threaded pipe socket series ... American Petroleum Institute (API), SQC qualification certification, the European Union, German TUV certification, and British classification societies certification. HOT SALE ...