保溫鋼管聚氨脂直埋保溫管又稱“管中管”其有“兩步法”構(gòu)成，是由高密度聚乙烯外維護層、聚氨脂硬質(zhì)泡沫塑管和鋼管組成。
Thermal insulation steel pipe polyurethane directly buried insulation pipe, also known as "pipe in tube", has two steps, consisting of external maintenance layer of high density polyethylene, rigid polyurethane foam plastic pipe and steel pipe.
保溫層材料為密度60kg/m380kg/m3的硬質(zhì)聚氨酯泡沫，充分添滿鋼管與套管之間的空隙，并具有必定的粘接強度，使鋼管、外套管及保溫層三者之間構(gòu)成一個堅固的整體。 保溫鋼管泡沫具有出色的機械功用和絕熱功用，通常狀況下可耐溫120℃經(jīng)過改性或與其它隔熱材料組合可耐溫180℃。保溫層材料為密度60kg/m380kg/m3的硬質(zhì)聚氨酯泡沫，充分添滿鋼管與套管之間的空隙，并具有必定的粘接強度，使鋼管、外套管及保溫層三者之間構(gòu)成一個堅固的整體。保溫鋼管泡沫具有出色的機械功用和絕熱功用，通常狀況下可耐溫120℃經(jīng)過改性或與其它隔熱材料組合可耐溫保溫鋼管
The insulating layer material is rigid polyurethane foam with density 60kg/m3 to 80kg/m3, fully filled the gap between the steel pipe and the casing, and has a certain bonding strength, so that the steel pipe, the outer sleeve pipe and the insulation layer can form a solid whole between the three. The insulation steel tube foam has excellent mechanical function and adiabatic function. Under normal conditions, it can withstand 120 degrees of temperature and is able to withstand temperature of 180 degrees after being modified or combined with other insulation materials. The insulating layer material is rigid polyurethane foam with density 60kg/m3 to 80kg/m3, fully filled the gap between the steel pipe and the casing, and has a certain bonding strength, so that the steel pipe, the outer sleeve pipe and the insulation layer can form a solid whole between the three. The insulation steel pipe foam has excellent mechanical function and adiabatic function. Under normal conditions, it can withstand 120 degrees of temperature and is modified or combined with other insulation materials.
1.防腐層：維護外鋼管避免腐蝕物腐蝕鋼管，延長鋼管運用壽命。
1. Anti-corrosive coating: Maintain external steel pipe to avoid corrosion and prolong service life of steel pipe.
2.外護鋼管: 維護保溫層免受公開水腐蝕，支撐作業(yè)管并能承受必定的外部荷載，確保作業(yè)管正常作業(yè)。
2. External steel pipe protection: Maintain the insulation layer from open water corrosion, support the work pipe and can withstand certain external loads to ensure the normal operation of the work pipe.
3.聚氨酯泡沫層: 確保介質(zhì)溫度，確保外護管表面堅持常溫。
3. polyurethane foam layer: ensure the temperature of the medium and ensure the surface of the outer tube is kept at normal temperature.
4.隔絕、反射層: 確保有機泡沫材料不進入無機硬質(zhì)耐高溫層;反射耐高溫層局部熱量。
4. isolation and reflective layer: ensure that the organic foam material does not enter the inorganic hard and high temperature resistant layer; reflects the local heat of the high temperature resistant layer.
5.無機硬質(zhì)保溫層：耐高溫，確保與有機保溫層之間的界面溫度，確保泡沫不被炭化。
5. inorganic hard insulation: high temperature, ensure the interface temperature between the organic insulation layer and ensure that the foam is not carbonized.
6.減阻層: 確保作業(yè)鋼管熱脹冷縮自由運動。
6. Drag Reduction Layer: Ensure free movement of hot expansion and cold contraction of working steel pipe.
7.作業(yè)鋼管：確保保送介質(zhì)正常活動。
7. Working steel pipe: Ensure the normal activity of the delivery medium.
It is believed that after reading the introduction of http://www.qndr49.cn, the polyurethane insulation steel pipe manufacturer in this paper, they will have their own understanding of this aspect, and other problems can be solved well in the future.
