来源:http://www.rrhsf.com 日期:2019-03-29 发布人:admin
1. Reducing 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.
Low Heat Loss and Energy Conservation
The thermal conductivity of polyurethane direct-buried insulation pipe is 0.013-0.03kcalm h oC, which is much lower than other commonly used pipeline thermal insulation data, and the thermal insulation effect is improved by 4-9 times. And its water absorption is very low, about 0.2 kgm2. The reason for low water absorption is that the polyurethane foam has a closed porosity of about 92%. Low thermal conductivity and low water absorption, together with high density polyethylene (HDPE) or fiberglass reinforced plastics (FRP) maintenance shell with good insulation layer and external waterproofing performance, have changed the situation of traditional trench laying heating pipeline "wearing wet cotton jacket", greatly reducing the overall heat loss of heating pipeline, the heat loss of heating network is 2%, less than the international norm request of 10%.
3. Anti-corrosion, good insulation, long service life
Because the polyurethane direct-buried insulating pipe insulation layer is tightly bonded to the surface of the steel pipe, which isolates the air and water infiltration, it can play a good anti-corrosion role. At the same time, its foaming holes are closed and its water absorption is very small. High density polyethylene shell and FRP shell have good anti-corrosion, insulation and mechanical properties. Therefore, it is very difficult for the outer skin of the working steel pipe to be corroded by the external air and water. According to foreign materials, the service life of polyurethane direct-buried insulation pipe can reach more than 50 years, which is 3-4 times longer than that of traditional trench laying and overhead laying.
4. An alarm system can be set up to automatically detect the leakage of pipeline network, accurately indicate the location of the fault and automatically alarm.
The polyurethane direct-buried insulation pipe has a leakage alarm line. Once the leakage occurs somewhere in the pipeline, through the transmission of the alarm line, the precise location and leakage level of the insulation pipeline can be displayed on the special detection instrument, so as to inform the inspectors to deal with the leakage pipeline quickly and ensure the safe operation of the heating network.
5. Less land occupation, fast construction and favorable environmental maintenance
Polyurethane directly buried insulating pipes do not need to build huge trenches, only need to bury insulating pipes in the open, which greatly reduces the project area, reduces the amount of earthwork excavation by more than 50%, and reduces the amount of civil masonry and concrete by 90%. At the same time, the processing of polyurethane direct buried insulating pipe and digging ditches on site are stopped in parallel, and the construction period can be shortened by more than 50% with only on-site joints.
Storage mode:
1. The air should be flat and free of hard impurities such as gravel.
2. Drainage ditches should be excavated in the site, and water should not accumulate in the site.
3. Pipe brackets should be installed in the stacking site, and the outer protective pipe should be higher than 150 mm in the air.
4. The stacking height of insulating pipes should not be greater than 2 meters.
5. Insulation pipes should not be exposed to the sun, rain and soaking, open storage should be covered with tarpaulins, stacking place should be away from heat sources and fire sources.
The wonderful content of this article is compiled by the black jacket straight-seam steel pipe. Our company insists on the win-win concept of honesty and cooperation to provide you with perfect service. Welcome to http://www.rrhsf.com.

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