The inner winding wire tight liner: Manufacturing process: the first several layers of PTFE film is wound on the mold, then the wire (0.5-1mm) helically wound on the PTFE film, and after the outside of the wire wound several layers of PTFE thin, and finally placed in a furnace and sintering. PTFE lined pipe made with this process, smooth wall, the outer wall of force due to wire the volume of their outer shells, the formation of spiral line ripple. Lining into a steel tube filled with resin and filled in the gap between the PTFE lined pipe outer wall and the inner wall of pipe (non-residual air). This filled with resin and steel pipe tightly bonded together. Meanwhile, it can be tightly wrapped in a spiral-shaped outer wall of the PTFE liner. After the filled resin is cured to form a helically corrugated outer wall corrugated nip and lining. This structure is similar to the combination of the nut and the screw. The one hand, it enables the expansion and contraction of the PTFE lining effective restrictions and compensation, on the other hand, the stiffness of the use of steel wire to improve the negative pressure PTFE lining resistant capacity. Push (squeeze) pressure lined straight tube system commonly used by the pipeline in the 1990s developed countries: the manufacturing process: First imported PTFE powder, push (squeeze) pressed into the tube, and then forcibly pulled into seamless steel pipe (outer liner diameter slightly larger than the steel pipe inner Mody 1.5-2mm), no gap is formed tight lining. Elimination pressure, it is placed in a furnace, heated to 180 ° C isothermal processing, to adapt it for use in a temperature of 180 ° C or less. At the same time, push (squeeze) pressure tube axial tensile strength is significantly better than winding pipe. This pipe has a resistance to the positive and negative capacity. www.hbthgg.com www.thgangguan.com www.naimoguanjian.com www.bengguan168.com www.hbbengguan.com www.hbbgc.com www.pvdfgc.com www.naimogd.com