... . Shandong xinyuan steel pipe manufacturing Co., LTD. Is the production of domestic seamless steel tube of thick wall, ... wall stainless steel pipe, seamless tube, alloy, stainless steel seamless tube fittings and non-standard seamless tube, oil pipe casing and ... produces, high standard of various materials, etc), different-diameter pipe pressure, elbow, stone, bend, flange etc. Various auxiliary ...