What are the characteristics of polyurethane lined pipes
Polyurethane lined pipes have excellent comprehensive properties such as wear resistance, acid resistance, alkali resistance, corrosion resistance, hydrolysis resistance aging, anti-scaling, high elasticity, and mechanical impact resistance. It can be widely used in power, coal, mining, building materials, chemical industry and other industries to transport pulverized coal, ash, slag, aluminum liquid, slurry and other abrasive particulate materials and corrosive media.
Features of polyurethane lined pipes
1. Reduce project cost.
According to the calculations of relevant departments, the dual-control heating pipes can generally reduce the project cost by 25% (using FRP as the protective layer) and 10% (using high-density polyyiene as the protective layer).
2. Low heat loss, save energy.
The thermal conductivity of is: λ=0.010-0.03kcal/m·h·oC, which is much lower than other commonly used pipeline insulation materials in the past, and the insulation effect is increased by 4-9 times. Furthermore, its water absorption rate is very low, about 0.2kg/m2. The reason for the low water absorption rate is that the closed cell rate of polyurethane foam is as high as 92%. The low thermal conductivity and low water absorption rate, together with the insulation layer and the high-density polyyiene or glass fiber reinforced plastic protective shell with good waterproof performance outside, have changed the condition of the traditional gutter laying heating pipe "wetted cotton jacket", greatly reducing the heating pipe The overall heat loss of the heat network is 2%, which is less than the international standard 10%.
3. Anti-corrosion, good insulation performance and long service life.
Because the rigid polyurethane foam insulation layer is tightly bonded to the outer skin of the steel pipe, it prevents the infiltration of air and water, and can play a good anticorrosive effect. At the same time, its foam cells are closed, and the water absorption is very small. The high-density polyyiene shell and glass fiber reinforced plastic shell have good corrosion resistance, insulation and mechanical properties. Therefore, the outer skin of the working steel pipe is hardly eroded by outside air and water. As long as the internal water quality of the pipeline is well treated, the service life can reach more than 50 years, which is 3 to 4 times longer than the traditional trench laying and overhead laying.
4. Pipe insulation. It occupies less land and the construction is fast, which is beneficial to environmental protection.
The insulation of directly buried heating pipelines does not require the construction of huge trenches, but only needs to bury the insulation pipes underground, thus greatly reducing the project footprint, reducing the amount of earthwork excavation by more than 50%, and reducing the amount of civil construction and concrete by 90% . At the same time, insulation pipe processing and on-site trenching are performed in parallel, and only on-site joints are needed, which can shorten the construction period by more than 50%.
Polyurethane lined pipeline applications
Power industry: ash removal pipelines, ash residue pipelines, and gray water recovery pipelines in thermal power plants. For the power plant fresh water, seawater ash removal, and acidic media delivery systems, the use of polyurethane composite steel pipes can reflect its superiority.
Coal industry: coal washing plant heavy-duty coal preparation and long-distance casting coal pipeline system. Backfill of sediment in coal mining.
Mine industry: iron ore copper ore pulp, mine concentrate, tailings conveying system, mine flotation system closed circulation pipeline, water and sand conveying in gold mining.
Construction materials, chemical industry: the transportation of coke particles in steel plants, the transportation of coal powder in cement plants, the transportation of corrosive acids and alkalis, and the corrosion of solids and liquids. Such as pipeline transportation in oil mining, silt removal project, urban water supply system, aluminum liquid transportation, all have obvious effects.
Chai Shang Trading Co., Ltd. is a professional manufacturer of polyurethane-lined pipes, focusing on the production and sales of polyurethane-lined pipes for more than 20 years. It is a good choice for you. I look forward to your call.
https://www.miningscreenmesh.com
