... pipes, oil pipes, ERW pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc.. TYPES: elbows ... 2616 , JIS standards,JIS B2311/2312, GB12459-99elbow : 90D , 45D, 180D, LR , SR ,seamless pipe :A106 GR.B / ... pipes, ERW pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc...1. Butt ... weld Elbow 45degree & 90degree Long Radius &Short Radius2. ...