We are specilized in producing cold drawn seamless steel pipe, each tube is controlled strictly according to the below thirteen prodction process: 
 一、Mother tube choosing(billets or bar) 八、Picking
 二、Reheating furnace thaw material 九、Size testing
 三、Hot perforation 十、Physical testing
 四、Cutting 十一、Eddy current inspection
 五、Circular cold-drawing 十二、Finished product inspectio
 六、Annealing 十三、Marking and packaging
 七、Straightening