1. Reduce the cost of construction.
According to the calculation of relevant departments, double-pipe heating pipeline can reduce the cost of construction by 25% (using FRP as maintenance layer) and 10% (using high density polyethylene as maintenance layer) under normal conditions.
2. Low heat loss and energy saving.
Its thermal conductivity is: lambda =0.013 - 0.03kcal/m. H. OC, which is much lower than other commonly used pipe insulation materials. The insulation effect is progresses 4~9 times. The water absorption rate is very low. The reason why the water absorption rate of 0.2kg/m2. is low is that the polyurethane foam has a closed porosity of about 92%. Low thermal conductivity and low water absorbability, plus high density polyethylene or glass fibre reinforced plastic with good thermal insulation and water resistance outside. Maintenance shell, changed the traditional trench laying heating pipeline "wearing wet cotton jacket" situation, greatly reduced the overall heat loss of heating pipeline, heat loss of the heating network is 2%, less than 10% of the international norms.
3. Anti-corrosion, good insulation and long service life.
Because the polyurethane rigid foam insulation layer is tightly bonded to the outer skin of the steel pipe, the infiltration of air and water can be isolated. It can play a good antiseptic effect. At the same time, the foamed holes are closed and the water absorbency is very small. The high density polyethylene shell and the FRP shell have good anticorrosion, insulation and mechanical properties. Therefore, the outer skin of the work steel pipe is difficult to be corroded by external air and water. The water quality inside the road is well disposed, and its service life can reach more than 50 years, which is 3-4 times longer than that of traditional trench laying and overhead laying.
4. Pipeline insulation. Less land occupation, faster construction, favorable environmental maintenance.
Directly buried heat-supply pipelines do not need to build huge trenches for heat preservation, only burying heat preservation pipelines openly, which greatly reduces the construction area, reduces the excavation of Earthwork by more than 50%, and reduces the amount of civil construction and concrete by 90%. Meanwhile, the processing of heat preservation pipelines and the excavation of trenches on site are stopped in parallel, and the construction period can be shortened by more than 50% with only on-site joints.
Polyurethane foamed insulation pipeline has many excellent characteristics, such as light bulk density, high strength, heat insulation, sound insulation, flame retardant, cold resistance, anticorrosion, non-water absorption, cumbersome and fast construction. It has become an indispensable product for thermal insulation, waterproof, leak plugging and sealing in petroleum, chemical, electric power, construction, transportation, refrigeration and other industrial sectors.
Above is the information about the black jacket straight seam steel pipe introduced by today's edition. You can pay attention to our website in time: https://www.sdhpgy.com for more details and consultation. We will have more wonderful content for you.
