高密度聚乙烯预制直埋保温管合适保送在-50℃—150℃范围内的各种介质的保温保冷工程。它普遍应用于城市集中供热、暖室、冷库、煤矿、石油港口、化工等行业的保温保冷工程。但是，高密度聚乙烯比玻璃钢的耐气候性差，耐热性低。高密度聚乙烯耐热为60℃—70℃，而玻璃钢的耐热为100—120摄氏度，因而，在应用中应惹起注重！
High density polyethylene (HDPE) prefabricated directly buried insulating pipes are suitable for insulating and cooling projects of various mediums in the range of - 50 ~150 C. It is widely used in urban central heating, heating room, cold storage, coal mine, petroleum port, chemical industry and other industries of thermal insulation and cooling engineering. However, the weather resistance and heat resistance of HDPE are lower than that of FRP. High density polyethylene (HDPE) has a heat resistance of 60 - 70 degrees, while glass fiber reinforced plastics (FRP) has a heat resistance of 100 - 120 degrees. Therefore, attention should be paid to its application.
聚氨酯保温管黑夹克贮存
Black Jacket Storage with Polyurethane Insulation Pipe
1、.黑夹克聚乙烯外护管易老化，如露天寄存宜用篷布等物遮盖，堆放处应远离高热源和火源，制成保温管后，制止暴晒、骤冷，否则聚乙烯管易开裂，影响产品性能和运用寿命。
1. Black jacket polyethylene exterior guard pipe is easy to aging, such as open storage should be covered with tarpaulin and other things, the stacking place should be far away from high heat source and fire source, after making insulating pipe, prevent sunshine and sudden cooling, otherwise polyethylene pipe is easy to crack, affecting product performance and service life.
2、运输和穿管过程中，应防止野蛮装卸，挂钩过细、过硬、用力过猛，否则易形成聚乙烯管摔坏、划伤或撕裂。
2. In the process of transportation and pipeline piercing, we should prevent rough handling, too thin, too hard and too hard hooks, otherwise, polyethylene pipes may be easily broken, scratched or torn.
3、管材壁厚可调整，壁厚、颜色可按用户请求消费，因管材壁厚不同，保温层厚度为约数，应按实践厚度计算。
3. Pipe wall thickness can be adjusted, wall thickness and color can be consumed according to user's request. Because of the difference of pipe wall thickness, the thickness of insulation layer is about a number, which should be calculated according to the practical thickness.
4、与管材配套的支架、塑料塞、两头法兰盘，焊条、焊枪、热缩带等齐全。
4. The supporting brackets, plastic plugs, flanges at both ends, welding rods, welding torches, thermal shrinkage bands, etc. are complete.
E.表中的允许偏向是按CJ/114-2000行业规范制定的。
E. The allowable bias in the table is formulated in accordance with CJ/114-2000 industry specifications.
计算公式为：外径≤400mm时，上下偏向之和=0.1×公称壁厚+0.2
The calculating formula is as follows: when the outer diameter is less than 400 mm, the sum of the upper and lower deviations is equal to 0.1 x nominal wall thickness + 0.2
外径≥400mm时，上下偏向之和=0.15×公称壁厚+0.2
When the outer diameter is greater than 400 mm, the sum of the upper and lower deviations is equal to 0.15 x nominal wall thickness + 0.2.
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