... pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc.. 1) Stainless steel flange and carbon steel flange2) Standard: ... 2,500mm5) Production with anneal solution for stainless performance6) Special design availablePacking:wooden cases or ... , oil pipes, ERW pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc...1. Butt ... give you details. BS stainless steel Welding Neck Flange