... Wuxiao Group Co.,Ltd is one of the leading China large diameter welded pipe manufacturers and suppliers, with professional factory we are ... always able to offer you CE certification large diameter welded pipes products made in China at best price.• ... 20#, 45#, 16Mn•Thickness: 5-100mm•Section shape: round•Outer diameter: 300-5,000mm•Place of origin: Shandong, China (Mainland)•Secondary ...