The insulation layer is made of rigid polyurethane foam with a density of 60kg/m3 ~ 80kg/m3, which fully fills the gap between the steel pipe and the casing, and has a certain bonding strength, so that the steel tube, the outer pipe and the insulation layer form a solid whole. Polyurethane directly buried insulation pipe foam has good mechanical properties and thermal insulation properties. Usually it can withstand 120 degrees of temperature by modifying or combining with other thermal insulation materials.

　　1. 防腐层:保护钢管外层不受腐蚀，延长钢管使用寿命。

　　1. Anti corrosion coating: protect the outer layer of steel pipe from corrosion and extend the service life of steel pipe.

　　2. 外保护钢管:保护保温层不受地下水侵蚀，支撑工作管道，能承受一定的外荷载，保证工作管道的正常运行。

　　2. External protection steel pipe: protect the insulation layer from groundwater erosion, support the working pipeline, bear certain external load, and ensure the normal operation of the working pipeline.

　　3.聚氨酯泡沫层:保证介质温度和外层保护管表面温度保持正常。

　　3. polyurethane foam layer: ensure the medium temperature and the surface temperature of the outer protective tube are kept normal.

　　4. 屏障和反射层:确保有机泡沫材料不进入无机硬质耐高温层;反射耐高温层的部分热量。

　　4. barrier and reflective layer: ensure that organic foam material does not enter the inorganic hard and high-temperature resistant layer; reflects part of the heat of the high temperature resistant layer.

　　5. 无机硬保温层:耐高温，保证有机保温层之间的界面温度，保证泡沫不碳化。

　　5. inorganic hard insulation: high temperature, ensure the interface temperature between the organic insulation layer, ensure that the foam is not carbonized.

　　6. 减阻层:保证工作钢管在热胀冷缩时的自由运动。

　　6. Drag reduction layer: ensure the free movement of the working steel pipe during thermal expansion and cold contraction.

　　7. 工作钢管:保证输送介质的正常流动。

　　7. Working steel pipe: ensure the normal flow of conveying medium.

　　聚氨酯三工艺发泡聚氨酯

　　Polyurethane three process foaming polyurethane

　　二聚体的方法

　　The method of dimer

　　预聚体法的发泡过程是先将(白色材料)和(黑色材料)制成预聚体，再将水、催化剂、表面活性剂等添加剂加入预聚体中，高速搅拌混合发泡。固化后可在一定温度下固化。

　　The foaming process of prepolymer method is to make prepolymer from (white material) and (black material), then add water, catalyst, surfactant and other additives into prepolymer, and mix the foaming at high speed. After curing, it can be cured at a certain temperature.

　　半a预聚体

　　Semia prepolymer

　　semi-prepolymer的发泡过程方法是使聚醚多元醇的一部分(白色物质)和二异氰酸酯(黑色材料)预聚物,然后添加聚醚的另一部分或聚氨酯多元醇dicyanate酯、水、催化剂、表面活性剂和其他添加剂,并在高速搅拌发泡混合它们。

　　The foaming process of semi prepolymer is to make a part of polyether polyol (white material) and diisocyanate (black material) prepolymer, then add another part of polyether or polyurethane polyol dicyanate ester, water, catalyst, surfactant and other additives, and mix them in high-speed stirring foaming.

　　一步发泡

　　One step foaming

　　聚醚或聚酯多元醇(白色材料)、聚异氰酸酯(黑色材料)等原料、水、催化剂、表面活性剂、发泡剂等添加剂一步加入，高速搅拌发泡。

　　Polyether or polyester polyol (white material), polyisocyanate (black material) and other raw materials, water, catalyst, surfactant, foaming agent and other additives are added in one step, and foaming is stirred at high speed.

　　一步发泡工艺应用广泛。还有手工发泡的过程，这是zUI的一个简单的方法，精确称量所有的原料，把它们放在一个容器里，然后立即混合，注入模具或需要填充泡沫的空间。注:多异氰酸酯(黑色材料)的zUI必须称重。

　　One step foaming process is widely used. There is also manual foaming process, which is a simple method of zUI, weighing all raw materials accurately, placing them in a container, then mixing immediately, injecting mold or filling the space of foam. Note: Zui of polyisocyanate (black material) must be weighed.

　　聚氨酯硬泡一般是室温发泡，成型过程相对简单。按施工机械化程度可分为手工发泡和机械发泡;根据发泡压力可分为高压发泡和低压发泡;按成型方式可分为浇注泡沫和喷淋泡沫。

　　Polyurethane rigid foam is usually room temperature foaming, the molding process is relatively simple. According to the degree of mechanization of construction, it can be divided into manual foaming and mechanical foaming. According to foaming pressure, it can be divided into high-pressure foaming and low pressure foaming. According to the forming method, it can be divided into pouring foam and spray foam.

　　高温预制直埋保温管主要由四部分组成:

　　High temperature prefabricated directly buried insulation pipe mainly consists of four parts:

　　工作钢管:按输送介质的技术要求焊接钢管、无缝钢管和双面埋弧螺旋焊接钢管应使用。

　　Working steel pipe: welded steel pipe, seamless steel pipe and double-sided submerged arc spiral welded steel pipe shall be used according to the technical requirements of transmission medium.

　　保温层:硬质聚氨酯泡沫。

　　Insulation layer: rigid polyurethane foam.

　　防护外壳:高密度聚乙烯或玻璃纤维。

　　Protective shell: high density polyethylene or glass fiber.

　　以上是济南保温管厂家小编为大家介绍的相关内容，想要了解更多内容，欢迎访问网站：http://www.sdhpgy.com

　　The above is the relevant content introduced by Jinan heat preservation pipe manufacturer. If you want to know more, please visit the website: http://www.sdhpgy.com