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The pipeline is relatively fixed. Except for the coal slurry pipeline which is still in the brewing stage, other pipelines for conveying media have been successfully constructed and operated in China. 5. The characteristics of long-distance pipelines Long-distance pipelines are one of the five major transportation industries of railways, highways, shipping, civil aviation and long-distance pipelines. In-service pipelines pose a long-term threat to ground structures or areas, especially natural gas, coal gas, LPG and other flammable gas pipelines, which pose a greater threat. Continuity of transportation. The construction unit has no ability PTFE BBQ Mesh Mats to choose an ideal construction site..1. Except for special terrain, long-distance pipelines are generally laid underground, and it is not easy to find potential hazards during operation, especially defects that have not been detected during construction. In addition to the common petroleum and natural gas, the transportation medium also includes industrial gases such as oxygen, CO2, etc. The construction operation points are constantly moving along with the construction progress. 2. That is, the pipeline is buried in the ground. Except for reasons such as reconstruction and laying of new lines, the pipeline will generally not be displaced. The topography has a direct impact on welding, so it must be adapted to local conditions. Therefore, pipeline welding quality is an extremely important factor affecting pipeline quality. Compared with the production of factory products, the difficulty of construction management, quality management, safety management, etc. is increased; because the welding operation is in a flow state, it is relatively difficult to ensure quality. A long-distance pipeline may encounter a variety of terrains? For example, the West-East Gas Pipeline Project will pass through Gobi, deserts, loess plateaus, mountains, plains, water networks, etc. Characteristics of welding in the construct,PTFE BBQ Mesh Mats ...ادامه مطلب

Filled products containing glass fibers are suitable for sintering in nitrogen. . has developed rapidly in chemical anti-corrosion.. The sintering process of the filled product is the same as that of pure PTFE. Commonly used fillers according to these requirements are: glass fiber, carbon fiber, graphite, quartz sand, molybdenum disulfide, amorphous carbon, calcium fluoride, bronze powder, ceramics, polyimide, polyphenylene, polyparahydroxyformate, etc. Improve the pressure resistance, wear resistance, cold flow resistance, heat resistance, dimensional stability, etc. Solvent mixing, the solvent is acetone or methanol, suitable for glass fiber filled PTFE. New application areas of PTFE. But for filled products containing MoS2, it is required to sinter in air at 360°C or in nitrogen at 380°C. Main applications It is used as oil-free lubrication bearings, bearing pads, piston rings, machine tool guides, etc. in the machinery industry. PTFE filled in foreign countries is generally completed by PTFE resin production plants, such as HosTaflonTF4000 series and HosTaflonTF3000 series of Hoechst in Germany And the HosTaflon2000 series. In our country, because PTFE BBQ Mesh Mats PTFE resin production technology lags behind processing technology, PTFE filling technology is completed in product processing plants. of PTFE by adding different fillers such as inorganic, metal, and polymer to the PTFE resin. Compared with pure PTFE, the filled products have 5-10 times higher pressure resistance, 1000 times higher wear resistance, 80% lower linear expansion coefficient, 5 times higher thermal conductivity, and reduced volume resistance and surface resistance. In recent years, the application of filled PTFE as the lining of pipes, valves, pumps, etc.Among polytetrafluoroethylene (PTFE) products, filled polytetrafluoroethylene (PTFE) products are the one with the largest output. There are currently three mixing methods used to fill PTFE: (1) The dry mixing process r,PTFE BBQ Mesh Mats ...ادامه مطلب