黑夹克保温管是一种保温性能好，加可靠，工程造价低的直埋预制保温管。直埋保温管不仅具有传统地沟和架空敷设管道难以比拟的技术、实用性能，而且还具有显著的社会效益和经济效益，也是供热的有力措施。
Black jacket insulation pipe is a kind of directly buried prefabricated insulation pipe with good thermal insulation performance, safety and reliability, and low engineering cost. The 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 remarkable social and economic benefits, which is also a powerful measure of heating and energy saving.
黑夹克保温管从里到外分三层结构
The insulation pipe of black jacket is divided into three layers from inside to outside
靠前层：工作钢管层 根据设计和客户的要求一般选用无缝管(GB8163-87)螺旋焊管(GB9711-88;SY/T5038-92)和直缝焊管(GB3092-93)。钢管表面经过的抛丸除锈工艺处理后，钢管除锈等级可达GB8923-1988标准中的Sa2级，表面粗糙度可达GB6060.5-88标准中R=12.5微米。
Near the front layer: according to the design and customer requirements, seamless pipe (gb8163-87), spiral welded pipe (gb9711-88; SY / t5038-92) and longitudinal welded pipe (gb3092-93) are generally selected for the working steel pipe layer. After the surface of steel pipe is treated by advanced shot blasting technology, the rust removal grade of steel pipe can reach SA2 grade in gb8923-1988 standard, and the surface roughness can reach r = 12.5 μ m in gb6060.5-88 standard.
第二层：聚氨酯保温层用高压发泡机在钢管于外护层之间形成的空腔中一次性注入硬质聚氨酯泡沫塑料原液而成。即俗称的“管中管发泡工艺”。其作用一是防水，二是保温，三是支撑热网自重。当输送介质温度为：-50℃—120℃时，选用硬质聚氨基脲酸酯泡沫塑料做保温层
The second layer: the polyurethane insulation layer is made of high pressure foaming machine in the cavity formed between the steel tube and the outer sheath. It is commonly known as "tube in tube foaming process". Its function is waterproof, thermal insulation, and supporting the self weight of heat supply network. When the conveying medium temperature is -50 - 120 - C, rigid polyurethane foam is chosen as insulation layer.
第三层：高密度聚乙烯保护层 预制成一定壁厚的黑色(黄色)塑料管材，其作用一是保护聚氨酯保温层免遭机械硬物破坏，二是防腐防水。聚乙烯外套管采用高密度聚乙烯材料制成，具有极高的机械强度和优良的耐腐蚀性能，可以保护管材在运输、安装及使用过程中避免因外界因素而造成的破坏。制造外套管应添加抗氧剂、紫外线稳定剂和碳黑等。 生产工艺 1、上料 2、挤出 3、模具 4、冷却 5、牵引 6、内表面电晕处理 7、切割 8、检验 9、成品
The third layer: HDPE protective layer is prefabricated into a certain wall thickness of black (yellow) plastic pipe. Its function is to protect the polyurethane insulation layer from mechanical hard objects damage, and the other is anti-corrosion and waterproof. Polyethylene outer pipe is made of high density polyethylene material, which has high mechanical strength and excellent corrosion resistance. It can protect the pipe from damage caused by external factors during transportation, installation and use. Antioxidants, UV stabilizers and carbon black should be added to the outer casing. Production process 1, feeding 2, extrusion 3, die 4, cooling 5, traction 6, corona treatment of inner surface 7, cutting 8, inspection 9, finished product
黑夹克保温管的优点
Advantages of black jacket insulation pipe
(1)工程造价低
(1) The project cost is low
(2)占地少，施工快，有利环境保护。
(2) It has the advantages of less land occupation, fast construction and environmental protection.
(3)夹克管节约能源，防腐，绝缘性能好，使用寿命长。
(3) The jacket tube has the advantages of energy saving, anticorrosion, good insulation and long service life.
(4)均设有渗漏报警线，。一旦管道某处发生渗漏，通过报警线的传导，便可在专用检测仪表上显示出保温管道渗水、漏水的准确位置及渗漏程度的大小，以便通知检渗人员迅速处理漏水的管段，保证供热管网的运行。
(4) There are leakage alarm lines for safety. Once there is leakage in the pipeline, through the conduction of the alarm line, the accurate position and degree of leakage of the insulation pipeline can be displayed on the special detection instrument, so as to inform the leakage inspection personnel to deal with the leaking pipe section quickly and ensure the safe operation of the heating pipe network.
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