Year1
- 规格型号：
- 齐全
: >Polyurethane insulation pipe
: >Main components 1. Protective shell: Made of high-quality Density polyethylene or fiberglass. 2. Insulation layer: made of rigid polyurethane foam. 3. Working steel pipe: According to the technical requirements of the transmission medium, seamed steel pipes, seamless steel pipes, and double-sided submerged arc spiral welded steel pipes are used. 4. Leakage alarm line: When manufacturing high-temperature prefabricated direct-buried insulation pipes, an alarm line is buried in the insulation layer close to the steel pipe. Once leakage occurs somewhere in the pipeline, through the conduction of the alarm line, it can be detected on a special detection instrument. Alarm and display the exact location of the leak and the extent of the leak, so that maintenance personnel can be notified to deal with the leaking pipe section quickly to ensure the safe operation of the heating network. There are three laying methods: direct burial, overhead, and trench
Characteristics of polyurethane insulated pipe
Polyurethane insulated pipe has the characteristics of light weight, high strength, thermal insulation, sound insulation, flame retardant, cold resistance, anti-corrosion, non-water absorption, and easy construction With its excellent features such as fastness, it has become an indispensable material for thermal insulation, waterproofing, sealing, etc. in industrial sectors such as construction, transportation, petroleum, chemical industry, electric power, and refrigeration. The thermal conductivity of polyurethane foam is the lowest among thermal insulation materials, so it can minimize the heat loss of the material. Waterproof, anti-corrosion and age-resistant. Since the closed cell ratio of polyurethane foam is above The penetration of corrosive liquids and gases prevents the growth and development of microorganisms. Polyurethane insulation pipes are very popular due to their excellent performance, convenient construction and long service life.
Common problems and solutions in the construction of polyurethane insulated pipes. The rise speed of polyurethane insulated pipes is slow. This phenomenon generally occurs during construction in autumn and winter or in the morning due to a sudden drop in temperature or low temperature. This can be solved by raising the ambient temperature and black material temperature. Generally, the temperature of the black material is raised to ℃, and the ambient temperature is raised to ℃. Polyurethane insulation pipes rise quickly. This phenomenon usually occurs during spring and summer or during construction at noon, due to a sudden rise in temperature or too high a temperature. The black material can be cooled with cold water or placed outside to cool naturally at night to avoid direct sunlight. The foam strength of polyurethane insulation pipe is small and the foam is soft. This phenomenon is caused by the imbalance of the proportion of black and white materials. Just increase the proportion of black materials appropriately (:.) Be careful not to make the proportion of black materials too large, otherwise, the foam will become brittle. , also affects foam performance. Polyurethane directly buried insulated pipes have become a relatively mature advanced technology in some developed countries abroad. In the past decade or so, our country's heating engineering technicians have digested and absorbed this advanced technology and are promoting the development of domestic pipe network laying technology to a higher level. The practical results of more than ten years have fully proved that the laying method of polyurethane insulation pipes has many advantages compared with traditional trench and overhead laying. Directly buried insulated pipes are closely combined with a steel pipe for transporting media, a high-density polyethylene outer casing, and a rigid polyurethane foam insulation layer between the steel pipe and the outer casing. This is also the use of polyurethane cheese insulated direct buried pipes in heating projects in my country.
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