... pipes, ERW pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc.. TYPES: elbows, seamless and welded ,L/R, S ... B2311/2312, GB12459-99elbow : 90D , 45D, 180D, LR , SR ,seamless pipe :A106 GR.B / A53 / API5LSIZE : 1/2"- 48"Wall thickness ... pipes and pipe fittings, such as saw pipes, oil pipes, ERW pipes, seamless steel pipes,elbow,reducer,tee,caps,flange,tube etc ...