Winding Pipe initial production more widely of a PTFE production of such tubes, freedom, small-diameter to large diameter (up to Φ2000mm above), the pipe turning film winding sintering into its integrity and uniformity of the winding tension when the thickness of the film, the degree of cleanliness of the surface of the film, the time of sintering temperature, time, and other factors, and difficult to master. Winding layers, the process is difficult to control, after sintering the integrity and uniformity is difficult to ensure. Therefore, Pipe maximum wall thickness of not more than 3mm, its production process is more rigorous control due to the processing methods PTFE mainly manual, inconsistent quality, lack of effective means of detection, and the winding pipe loose lining The book of the tube wall, the negative pressure and temperature fluctuations, pipeline pumping easy the deflated and flange flanging site easy to break and other defects. Lined PTFE pipes, pipe fittings, steel pipe, flange selection requirements: pipe with the national standard seamless steel pipe, due process requirements, the lining inside the pipe effective diameter smaller than the male of the steel pipe DN, designers and users to make the necessary the effective flow standard to determine the diameter of the steel pipe. 2, the flange can be based on user needs HG, GB, JB, ANSI, JIS, BS, DIN and other national standards can be forged, and also can be determined by the contract, the selection process recommended sealing surface plate welded flange, with neck welded flange. Sealing surfaces are flat sealing type, in order to facilitate the installation of pipelines, can provide users with flat weld flanges. Lined with PTFE lining layer testing, inspection and use: 1, pipes and pipe fittings are 1.5 times the design pressure of the hydrostatic test. 2, involving lined with PTFE lining layer after hydrostatic testing, 100% intact test the leakage point test method using a spark test. 3, use: a use temperature -20 to 200 ° C b pressure ≤ 2.5Mpa c allow negative pressure DN ≤ 250mm-is 0.09Mpa and DN> 250mm -0.08Mpa d. conveying any concentration of strong acids, strong alkalis, organic solvents, strong oxidizing agents, toxic, volatile, flammable chemical media. Wear pipeline www.hbguandao167.com