Shandong Baodelong Steel Pipe Manufacturing Co., Ltd is a large seamless steel tube manufacturing enterprise, with 300 thousand of production designs every year. It lis located in the beautiful Water City in the North of the China--Liaocheng,where Beijing-Kowloon railway,Jiguan freeway meet and extend all directions.The transportation is very convinient.We are mainly produce carbon seamless steel pipes, the external size is from 108mm-425mm,and the wallthickness is from 4 mm to 35 mm. We have got ISO9001 International Quality Control Certificate ,therefore we can promise hte good quality of...