... We are a big manufacturer factory in china which produce seamless pipe, we have two factory seprately produce cold drawn ... -127mm WT(wall thickness): 3.5-20 mm cold drawn seamless pipespeciation: 40, 42, 45, 48, 51, 54, 57, 60, 63 ... ) 180-377mm WT(wall thickness): 14-80 mm hot-rolled seamless pipespeciation: 180, 188, 191, 194, 203, 219, 232, 245, 267 ...