Qingdao Wuxiao Group Co.,Ltd is one of the leading China large diameter welded pipe manufacturers and suppliers, with professional ... you CE certification large diameter welded pipes products made in China at best price.•Standards: GB, ASTM•Standards: GB/T ... •Outer diameter: 300-5,000mm•Place of origin: Shandong, China (Mainland)•Secondary or not non-secondary•Applications: structure pipe•Technique: EFW ...