Jinan heat preservation pipe is divided into three layers from inside to outside: working steel pipe layer. According to the design and user requirements, seamless steel pipe (gb8163-87) and spiral welded pipe (gb9711-88) are generally selected. SY / T 5038-92) and straight welded pipe (GB 3092-93). Polyurethane insulation pipe is made of high performance polyether polyol composite and polymethyl polyphenyl polyisocyanate by chemical reaction. Polyurethane heat preservation pipe has outstanding characteristics of light bulk density, high strength, heat insulation, sound insulation, flame retardant, cold resistance, corrosion resistance, non water absorption, simple and rapid construction, and has become an indispensable material for insulation, water-proof and leakage stoppage, sealing and other industrial fields such as construction, transportation, petroleum, chemical industry, electric power, refrigeration, etc. The preformed polyurethane insulation pipe shall have a lower thermal conductivity. When damped, it has no metamorphism, good heat resistance, corrosion-free metal, light and many cavities; it has certain mechanical strength and will not be damaged by external forces; it is easy to process and low cost. Commonly used thermal insulation materials are expanded perlite and its products, glass wool and its products, rock wool products, microporous calcium silicate, aluminum silicate fiber products, foam plastics, foam asbestos and so on.
Polyurethane direct buried insulation pipe is suitable for indoor and outdoor pipes, central heating pipes, central air conditioning pipes, chemical industry, medicine and other industrial pipes. Polyurethane foam insulation tube polyurethane synthetic materials overview, since its inception in 30s, has been a good insulation material, has been developing rapidly, and its application scope is more and more widely. Because of its simple construction and remarkable energy saving and anti-corrosion effect, it is widely used in all kinds of pipes such as heating, refrigeration, oil, steam and so on. A large number of heating, cooling, oil transportation, steam and other pipelines. The surface of steel pipe is treated by advanced shot peening process. The derusting grade of steel pipe reaches SA2 of gb8923-1988 standard, and the surface roughness of steel pipe reaches 12.5 μ m of gb6060.588 standard. The second layer: polyurethane insulation layer and high pressure foaming machine form a cavity between the outer layer of steel tube, and injecting rigid polyurethane foam liquid at once. This is commonly known as the pipe foaming process. Its function is waterproof, heat insulation and load-bearing. When the conveying medium temperature is -50 - 120 C, the insulation layer is rigid polycarbonate foam. The third layer: anti-corrosion steel pipe is a kind of steel pipe with anti-corrosion performance, with good insulation performance. It has been widely used and promoted in the construction engineering, and has been continuously improved and promoted. There are different processing methods for anticorrosive and heat preservation steel pipes. Different processing methods determine different properties and functions of steel pipes, and the scope of use will also change. The production of anti-corrosion and heat preservation steel pipes shall meet the national standards. Different processing methods follow different standards, but they must meet the national production standards and be strictly implemented.
The above is the relevant content introduced by Ji'nan heat preservation pipe manufacturer. For more information, please visit the website: https://www.sdhpgy.com
