1. Whether the heat insulation layer of black jacket insulation pipe is eccentric, that is, polyurethane insulation layer is different from steel pipe, and the insulation thickness is uneven, and serious people will be damaged by external plastic softening.

2.黑色夾克保溫管的使用在運輸和安裝過程中容易受損，沉沒后地面深度不足，或者上部土壤和道路松軟，裝載車輛被踐踏后受損。

2. The use of black jacket insulation pipe is easy to be damaged in the process of transportation and installation. After sinking, the ground depth is insufficient, or the upper soil and road are soft, and the loading vehicle is trampled.

3、黑色夾克保溫管介面處理，在管道安裝過程中，兩個管道焊接不能緊密滲透，或在“補入”過程中不能正常工作，外部污水滲透保溫層等破壞。

3. In the process of pipeline installation, the welding of the two pipes can't penetrate tightly, or they can't work normally in the process of "filling", and the external sewage can't penetrate the insulation layer.

4、如果經常發現使用夾克管的選材(如雜物回收塑料)，擠壓成型的塑料管就不能充分塑化，外部管就會劣化。聚氨酯保溫管密度低，強度低，在處理過程中受損，系統中玻璃酸太高，腐蝕在鋼管外墻等。

4. If it is often found that the material of jacket pipe (such as waste recycling plastic) is used, the extruded plastic pipe can not be fully plasticized, and the external pipe will deteriorate. Polyurethane insulation pipe has low density and low strength, which is damaged in the process of treatment. The glass acid in the system is too high, and corrosion occurs on the outer wall of steel pipe.

聚氨酯黑夾克保溫管高溫預制直埋保溫管是一種保溫性能好，加安全可靠，工程造價低的直埋預制保溫管。有效的解決了城鎮集中供熱中130C - 600C高溫輸熱用預制直埋保溫管的保溫、滑動潤滑和管端的防水問題。高溫預制直埋保溫管不僅具有傳統地溝和架空敷設管道難以比擬的先進技術、實用性能，而且還具有顯著的社會效益和經濟效益，也是供熱節能的有力措施。高溫預制直埋保溫管由于聚氨酯硬質泡沫保溫層緊密地粘結在鋼管外皮，隔絕了空氣和水的滲入，能起到良好的防腐作用。同時它的發泡孔都是閉合的，吸水性很小。聚氨酯保溫管高密度外殼、聚氨酯保溫管玻璃鋼外殼均具有良好的防腐、絕緣和機械性能。

Polyurethane black jacket thermal insulation pipe is a kind of direct buried insulation pipe with good thermal insulation performance, safety and reliability, and low engineering cost. It can effectively solve the problems of heat preservation, sliding lubrication and waterproof of pipe ends of the prefabricated directly buried insulation pipe for 130c - 600C high temperature heat transmission in urban central heating. High temperature prefabricated directly buried insulation pipe not only has the advanced technology and practical performance that traditional trench and overhead laying pipeline can't match, but also has significant social and economic benefits, which is also a powerful measure of heating and energy saving. The high temperature prefabricated directly buried insulation pipe is tightly adhered to the outer skin of the steel pipe due to the rigid polyurethane foam insulation layer, and the air and water infiltration are separated from the insulation layer, which can play a good anticorrosive role. At the same time, its foam cells are closed, water absorption is very small. The high density shell of polyurethane insulation pipe and the glass fiber reinforced plastic shell of polyurethane insulation pipe have good anticorrosion, insulation and mechanical properties.

聚氨酯保溫管泡沫強度小，泡沫柔軟現象是黑白比例失衡造成的，適當增加石墨的比例即可(1: 1-1.05)。請注意，黑材料的比例不要太大。否則，泡沫酥脆，也會影響泡沫性能。聚氨酯黑色夾克孵化器預制孵化器是保溫性能好、安全可靠、工程成本低的直賣式孵化器。

PU foam insulation foam strength is small, soft foam phenomenon is caused by imbalance between black and white ratio, appropriate increase the proportion of graphite can (1: 1-1.05). Please note that the proportion of black material should not be too large. Otherwise, the foam crisp will also affect the performance of the foam. Polyurethane black jacket incubator prefabrication incubator is a direct selling incubator with good heat preservation performance, safety and reliability, and low engineering cost.