1、降低工程造價
1. Reducing Project Cost
據(jù)有關(guān)部門測算，雙管制供熱管道，普通狀況下能夠降低工程造價的25%(采用玻璃鋼做維護層)和10%(采用高密度聚乙烯做維護層)左右。
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、熱損耗低，節(jié)約能源
2. Low Heat Loss and Energy Conservation
聚氨酯直埋保溫管其導(dǎo)熱系數(shù)為:λ=0.013-0.03kcalm·h·oC，比其他過去常用的管道保溫資料低得多，保溫效果進步4~9倍。再有其吸水率很低，約為0.2kgm2。吸水率低的緣由是由于聚氨酯泡沫的閉孔率高達92%左右。低導(dǎo)熱系數(shù)和低吸水率，加上保溫層和外面防水性能好的高密度聚乙烯或玻璃鋼維護殼，改動了傳統(tǒng)地溝敷設(shè)供熱管道"穿濕棉襖"的情況，大大減少了供熱管道的整體熱損耗，熱網(wǎng)熱損失為2%，小于10%的規(guī)范請求。
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、防腐，絕緣性能好，運用壽命長
3. Anti-corrosion, good insulation performance and long service life
由于聚氨酯直埋保溫管保溫層嚴密地粘結(jié)在鋼管表面面，隔絕了空氣和水的滲入，能起到良好的防腐作用。同時它的發(fā)泡孔都是閉合的，吸水性很小。高密度聚乙烯外殼、玻璃鋼外殼均具有良好的防腐、絕緣和機械性能。因而，工作鋼管外皮很難遭到外界空氣和水的腐蝕。只需管道內(nèi)部水質(zhì)處置好，據(jù)國外材料引見，聚氨酯直埋保溫管的運用壽命可達50年以上，比傳統(tǒng)的地溝敷設(shè)、架空敷設(shè)運用壽命高3~4倍。
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、占地少，施工快，有利環(huán)境維護
4. Less land occupation, fast construction and favorable environmental maintenance
聚氨酯直埋保溫管不需求砌筑龐大的地溝，只需將保溫管埋入公開，因而大大減少了工程占地，減少土方開挖量約50%以上，減少土建砌筑和混凝土量90%。同時，聚氨酯直埋保溫管加工和現(xiàn)場挖溝平行停止，只需現(xiàn)場接頭，能夠縮短工期約50%以上。
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.
5、可設(shè)置報警系統(tǒng)，自動檢測管網(wǎng)滲漏毛病，精確指示毛病位置并自動報警
5. 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.
聚氨酯直埋保溫管設(shè)有滲漏報警線，一旦管道某處發(fā)作滲漏，經(jīng)過報警線的傳導(dǎo)，便可在專用檢測儀表上顯現(xiàn)出保溫管道滲水、漏水的精確位置及滲漏水平的大小，以便通知檢滲人員疾速處置漏水的管段，保證供熱管網(wǎng)的平安運轉(zhuǎn)。
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.
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