聚氨酯保温钢管安装需要注意的事项
Attentions to Installation of Polyurethane Thermal Insulation Pipe
聚氨酯保温钢管低温预制直埋保温管由于聚氨酯硬质泡沫保温层严密地粘结在钢管外皮，隔绝了空气和水的进入，能起到出色的防腐效果。一同它的发泡孔都是闭合的，吸水性很小。高密度聚乙烯外壳、玻璃钢外壳均具有出色的防腐、绝缘和机械功能。因此，任务钢管外皮很舒服到外界空气和水的腐蚀。只需管道外部水质处置好，据国外资料引见，低温预制直埋保温管的运用寿命可达50年以上，比传统的地沟敷设、架空敷设运用寿命高3~4倍。
Polyurethane insulated steel tube prefabricated directly buried insulation pipe, because the polyurethane rigid foam insulation layer is tightly bonded to the outer skin of the steel pipe, and keeps the entry of air and water, can play an excellent anti-corrosion effect. Together, its foam holes are closed and its water absorption is very small. High density polyethylene shell and FRP shell have excellent anti-corrosion, insulation and mechanical functions. Therefore, the task steel pipe skin is very comfortable to the outside air and water corrosion. According to foreign data, the service life of low-temperature prefabricated 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.
直埋保温管道中聚氨酯保温钢管其导热系数爲：λ=0．013—0．03kcal/m·h·oC，比其他过来常用的管道保温资料低得多，保温效果提高4~9倍。再有其吸水率很低，约爲0．2kg/m2。吸水率低的缘由是由于聚氨酯泡沫的闭孔率高达92%左右。低导热系数和低吸水率，加上保温层和里面防水功能好的高密度聚乙烯或玻璃钢维护壳，改动了传统地沟敷设供热管道“穿湿棉袄”的情况，大大增添了供热管道的全体热损耗，热网热损失爲2%，小于10%的规范要求。
The thermal conductivity of polyurethane heat preservation pipe in directly buried heat preservation pipeline is: lambda = 0.013-0.03kcal/m.h.oC, which is much lower than other commonly used pipeline heat preservation data, and the heat preservation effect is increased by 4-9 times. And its water absorption is very low, about 0.2 kg/m2. 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 insulation layer and waterproof high density polyethylene or FRP maintenance shell, changed the traditional trench laying of heating pipeline "wearing wet cotton jacket", greatly increased the overall heat loss of heating pipeline, heat loss of heating network is 2%, less than the international norms of 10%.
防腐，绝缘功能好，运用寿命长。直埋保温管由于聚氨酯硬质泡沫保温层严密地粘结在钢管外皮，隔绝了空气和水的进入，能起到出色的防腐效果。一同它的发泡孔都是闭合的，吸水性很小。高密度聚乙烯外壳、玻璃钢外壳均具有出色的防腐、绝缘和机械功能。因此，任务钢管外皮很舒服到外界空气和水的腐蚀。只需管道外部水质处置好，据国外资料引见，直埋保温管的运用寿命可达50年以上，比传统的地沟敷设、架空敷设运用寿命高3~4倍。
Anti-corrosion, good insulation function, long service life. The directly buried insulation pipe is tightly adhered to the outer skin of the steel pipe because of the rigid polyurethane foam insulation layer, and the air and water entry can be isolated. Together, its foam holes are closed and its water absorption is very small. High density polyethylene shell and FRP shell have excellent anti-corrosion, insulation and mechanical functions. Therefore, the task steel pipe skin is very comfortable to the outside air and water corrosion. As long as the external water quality of the pipeline is well disposed, according to foreign data, the service life of the directly buried insulation pipe can reach more than 50 years, which is 3-4 times longer than that of the traditional trench laying and overhead laying.
占地少，施工快，有利环境维护和增添施工扰民。直埋供热管道不需求砌筑宏大的地沟，只需将保温管埋人地下，因此大大增添了工程占地，增添土方开挖量约50%以上，增添土建砌筑和混凝土量90%。一同，保温管加工和现场挖沟平行停止，只需现场接头，可以大幅度延长工期。由于增添了砖、水泥、砂石、余土等的运送，从而增添了施工进程中汽车尾气排放量、扬尘量、噪声排放量，从而维护了环境。
It occupies less land and constructs quickly, which is beneficial to environmental maintenance and disturbs the people. Directly buried heating pipelines do not need to build huge trenches. They only need to bury insulating pipes underground, thus greatly increasing the project area, increasing the amount of earthwork excavation by more than 50%, increasing the amount of civil masonry and concrete by 90%. Together, the processing of insulating pipe and digging ditches on site are stopped in parallel, and the construction period can be prolonged by a large margin with only on-site joints. The transportation of bricks, cement, sand and gravel, residual soil and so on has been added, thus increasing the emission of automobile exhaust, dust and noise in the construction process, thus maintaining the environment.
平安如今除中国外消费的直埋保温管，均设有渗漏报警线，一旦管道某处发作渗漏，经过报警线的传导，便可在公用检测仪表上显示出保温管道渗水、漏水的精确地位及渗漏水平的大小，以便通知检渗人员迅速处置漏水的管段，确保供热管网的平安运转。消费的保温管如今末设渗漏报警线，有待补上这一空白。
Ping'an now has leakage alarm lines for directly buried insulating pipes except for those consumed in China. Once leakage occurs somewhere in the pipeline and is transmitted by the alarm lines, the exact position and leakage level of the insulating pipes can be displayed on the public inspection instruments, so as to inform the inspectors to quickly dispose of the leakage pipelines and ensure the safe operation of the heating network. The leakage alarm line of the international consumption heat preservation pipes has been set up at the end of the day, which needs to be filled in.
In summary, all the above-mentioned Shandong Hipper Pipe Technology Development Co., Ltd. provides, want to know more about polyurethane insulation pipe manufacturers, welcome to pay attention to our website: http://www.sdhpgy.com Thank you for your support!
