High Temperature Insulating Sleeve
Introduction
High temperature insulation casing (English name: High temperature insulation casing), also known as fireproof casing, silicone rubber fiberglass casing, made of high-purity alkali-free glass fiber, and then coated with organic silica gel on the outer wall of the pipe. to make. After vulcanization, it can be used for a long time in the temperature range of -65 ° C ~ 260 ° C and maintain its soft elastic properties.
performance
The synthesis of special high temperature resistant materials determines that high temperature casings are difficult to replace with many other similar materials: high temperature resistance, thermal insulation properties, flame retardant properties, electrical insulation properties, chemical stability properties, weathering resistance, cold resistance, water resistance , oil resistance, ozone resistance, voltage resistance, arc resistance, corona resistance, etc., especially safety and environmental performance, is the best substitute for hazardous products such as asbestos.
species
1. Tube type: It is generally suitable for protecting short or relatively straight pipelines, cable protection, automobile wiring harnesses, common in generator sets, firm after installation, not easy to disassemble, sealed, insulated, heat-insulated, and moisture-proof.
2. Winding type: It is mainly used for high temperature protection of irregularly protected objects such as valves and curved pipes. It is convenient for winding, and is also suitable for outdoor high temperature pipelines, such as natural gas pipelines, heating pipes, etc., to maintain thermal insulation and reduce heat loss. .
3, buckle type: its advantages are easy to disassemble, do not need to stop the equipment when installing, unpack the cable, etc., the interior is stitched with fire-resistant flame-retardant adhesive tape, just need to bond the sleeve from the middle to play The function of sealing insulation does not affect the production of equipment and saves installation time. It is also commonly used in large-scale smelting equipment, and is also used in metal high-temperature hoses.
Features and applications
1. Safe and environmental protection, protect the health of workers: Alkali-free glass fiber itself has strong tensile strength, no wrinkle breakage, resistance to vulcanization, smokeless, halogen-free, non-toxic, pure oxygen, non-combustible, good insulation properties, and then cured by organic silica gel. It will strengthen its safety and environmental performance, effectively protect workers' human health and reduce the incidence of occupational diseases. Unlike asbestos products, it is extremely harmful to humans and the environment.
2, excellent high temperature resistance: the surface of the high temperature casing silicone contains both "organic groups" and "inorganic structures". This special composition and molecular structure make it combine the properties of organic matter with the function of inorganic substances. One body. Compared with other polymer materials, its most prominent is high temperature resistance. The silicon-oxygen (Si-O) bond is the main chain structure, the bond energy of the C-C bond is 82.6 kcal / gram, and the bond energy of the Si-O bond is 121 kcal / gram in the silicone, so Its thermal stability is high, and the chemical bonds of molecules at high temperatures (or radiation) do not break or decompose. Silicone is not only resistant to high temperatures, but also resistant to low temperatures and can be used over a wide temperature range. Whether it is chemical or physical and mechanical properties, it varies little with temperature.
3, anti-splash, multiple protection: in the smelting industry, the temperature of the medium in the electric furnace is extremely high, easy to form high-temperature splash (also in the electric welding industry), after cooling and solidification, slag is formed on the pipeline or cable, which will make the pipeline or The rubber on the outer layer of the cable hardens and eventually becomes brittle. In addition, it damages unprotected equipment and cables. After multiple layers of silica-coated high temperature resistant casing, it can achieve multiple safety protections. The maximum temperature resistance can reach 1300 degrees Celsius, which can effectively block high temperature melting of molten iron, molten copper and molten aluminum. Splashes of objects to prevent damage to surrounding cables and equipment.
4, thermal insulation, energy saving, radiation resistance: In the high temperature workshop, many pipes, valves or equipment, the internal temperature is very high, if not covered with protective materials, it is easy to cause people burn or heat loss. The high temperature resistant casing has better thermal stability than other polymer materials and is resistant to radiation and thermal insulation, preventing accidents, reducing energy consumption, and preventing the heat of the medium in the pipeline from being directly transmitted to the surrounding environment. The temperature in the workshop is too high, saving cooling costs.
5, moisture, oil, pollution, weathering, extending equipment life: high temperature casing has strong chemical stability, silicone oil, acid, alkali and other substances do not react, within 260 ° C, can be used for a long time Without aging, the service life in the natural environment can reach several decades, which can maximize the protection of pipelines, cables and equipment in these occasions, and greatly extend its service life.
6, ozone resistance, voltage resistance, arc resistance, corona resistance: Because the surface is coated with organic silica gel, its main chain is -Si-O-, no double bonds exist, so it is not easily decomposed by ultraviolet light and ozone. High temperature bushings have good electrical insulation properties, and their dielectric loss, withstand voltage, arc resistance, corona resistance, volume resistivity and surface resistivity are among the best in insulating materials, and their electrical properties are affected by temperature and frequency. The impact is small. Therefore, they are a stable electrical insulating material and are widely used in the electronics and electrical industries.
7, flame retardant, reduce the incidence of fire and spread speed: If the pipeline is transported by flammable medium or toxic medium, it will easily cause fire or casualty when leaking; cable also often burns due to local high temperature; high temperature casing use pole The high temperature resistant glass fiber is woven, and the surface silica gel is added with a special flame retardant and other special materials to make it have excellent flame retardancy. Even if a fire occurs, it can prevent the spread of the fire, still protect the internal pipeline intact for a long time, and provide sufficient time for the rescue of important information such as data and data.
Common areas: high temperature areas in other industries such as steel, smelting, shipbuilding and chemical industry, heating area cables, fluid lines, rolling mill cables, oil pipes, sawing and surrounding cables, generator sets, electrical voltage equipment, large buildings, hydraulic systems, automobiles Harness and exhaust pipe, etc.
The main production areas: the development of domestic high-temperature fireproof products started relatively late compared with foreign countries, but the development is rapid. The production of high-temperature casings is mainly concentrated in the rubber sealing industry and cement. The wear-resistant industry is relatively concentrated in Ningguo City, Anhui Province, with abundant resources and traffic. Convenience, Ningguo has gradually become a production base for high temperature protection products.
Quality standard: The high temperature casing is made of glass fiber and silica gel. The quality criterion is that the outer layer is rust red and darker in color; the overall elasticity is good, and the casing can be stretched to 1.3 times when stretched laterally; the inner layer The glass fiber is an alkali-free glass fiber, which is yellowish after vulcanization.
