Pipe Line SPIRAL WELDED STEEL PIPES Plant has CQC authorization for manufacturing DSAW Helical Seam Steel Line pipe in diameters ranging from 8.5/ 8" to 60" , in thickness from 5mm to 18mm and Steel....
Introduction and Overview QINGDAO OILRIG SERVICES CO., LTD. has been dedicating itself to export business of oilfield equipment and components to North/ South America, Europe, Middle East, South East....