... , the major material:304 304L 316 316L 321 pipe fittings( fitting,elbow,pipe elbow) 1) Type: butt welded pipe ... fittings, welded & seamless pipe fitting, such as elbows, cross, tee, ... foodstuff, power, papermaking, chemical, medical equipment, aviation, boiler heat, exchanger, and other fields elbow(stainless steel elbow,pipe fittings,fitting pipe) pipe ...