1. convex plate flat welding steel pipe flanges should comply with national standards, "convex plate flat welding steel pipe flanges" requirement GB / T9119.5 ~ 9119.10; and 2. convex steel pipe flanges with neck should comply with national standards, "convex steel pipe flanges with neck" GB / requirements T9114.1 ~ 9114.3, and only applies to the nominal diameter of not more than 150mm plastic composite pipe connections; when the pressure tank, should be based on different Select the size of the pipe corresponding to the high-pressure steel wheel series pipe steel pipe and tank size table to get out of the groove pressed. In pre-finished card slot pitch rings, gaskets, sealing rings seamless ideal slot pitch. When the pressure tank and cut the pipe diameter size selection should be based on the feed rate. Feed is not too fast, roll each round slot machine handle nearly to the amount of not more than 0.2mm. If you feed too quickly may cause the individual pipe deformation and rupture. Steel pipe steel pipe series | Golden Link Pipe Industry (certified) | steel pipe provided by the Hebei Golden Link Pipe Industry Co., Ltd .. Hebei Golden Link Pipe Industry Co., Ltd. (www.hbjinlingpipes.com/) Hebei Hengshui, chemical products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Industry leaders in Jinling staff warmly welcome all inquiries negotiations to create the Golden Link Pipe a better future.