... in producing saw pipes, oil pipes, ERW pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc.. TYPES: elbows, seamless and ... , such as saw pipes, oil pipes, ERW pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc...1. Butt weld Elbow ... Radius2. Butt weld Straight Tees & Reducing Tees 3. Butt weld Concentric Reducers & Eccentric Reducers4. Butt weld End Caps from 1/2 ...