保温管亦称预制保温管件，是一种保温性能好，加可靠，工程造价低的直埋预制保温管。有效的处置了城镇集中供热中－高温输热用预制保温管件的保温、滑动润滑和暴露管端的防水问题。保温管件不只具有传统地沟和架空敷设管道难以比拟的技术、适用性能，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。保温管件采用直埋供热管道技术，标志着供热管道技术展开曾经进入了新的起点。
Insulation pipe, also known as prefabricated insulation pipe fittings, is a kind of directly buried prefabricated insulation pipe with good insulation performance, safety and reliability, and low cost. The problems of insulation, sliding lubrication and waterproofing of prefabricated insulation pipes for medium-high temperature heat transfer in urban central heating are effectively dealt with. Thermal insulation pipe fittings not only have advanced technology and applicability that traditional trench and overhead pipeline laying can not match, but also have remarkable social and economic benefits, and are also powerful measures for energy saving of heating. The application of directly buried heating pipe technology in insulation pipe fittings indicates that the development of heating pipe technology in China has entered a new starting point.
一层：工作钢管层，根据设计和客户的恳求普通选用无缝管(GB8163)螺旋焊管（GB9711;SY/T5038）和直缝焊管(GB3092)。钢管表面经过的抛丸除锈工艺处置后，钢管除锈等级可达GB8923-标准中的Sa2级，表面粗糙度可达GB6060.5标准中R=12.5微米。钢管表面除污除锈后涂刷一层防腐材料，其作用一是防水，二是改善保温层与钢管之间的粘接表面，使它构成一个整体。
First layer: working steel pipe layer, according to the design and customer's request, seamless pipe (GB8163), spiral welded pipe (GB9711; SY / T5038) and straight welded pipe (GB3092) are generally selected. After the surface of steel tube is treated by advanced shot peening rust removal technology, the grade of steel tube rust removal can reach Sa2 grade in GB8923-standard, and the surface roughness can reach R=12.5 micron in GB6060.5 standard. The surface of steel pipe is decontaminated and rusted, then coated with a layer of anticorrosive material. Its function is waterproof, and the other is to improve the bonding surface between the insulation layer and the steel pipe, so as to make it a whole.
第二层：聚氨酯保温层，用高压发泡机在钢管于特制钢模具之间构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“模具发泡工艺"。聚氨酯泡沫能否发满，有任何质量问题便于直接检验。其作用一是防水，而是保温，三是支撑热网自重。当保送介质温度为：-50℃—120℃时，选用硬质塑料做保温层；当保送介质温度为：-50℃—150℃时，选用硬质塑料做保温层。
The second layer is polyurethane insulation layer, which is made by one-time injection of rigid polyurethane foam plastics into the cavity formed between the steel pipe and the special steel mould by high-pressure foaming machine. That is commonly known as "mold foaming process". PU foam can be full, any quality problems for direct inspection. Its function is waterproof, but heat preservation, and the third is to support the self-weight of the heating network. When the temperature of delivery medium is -50 ~120 ~C, rigid plastics are chosen as insulation layer; when the temperature of delivery medium is -50 ~150 ~C, rigid plastics are selected as insulation layer.
第三层：玻璃钢维护层用机械湿法缠绕制造而成。其作用一是维护聚氨酯保温层免遭机械硬物破坏，二是防腐防水，它的耐气候性、耐酸性、耐海水性较好，但是，树脂必需用306#、191#、189#、196#等刚性和半刚性不饱和树脂。玻璃纤维及布必需用白金钳埚或池窑拉丝而成的中低碱纤维纱，遏止运用土埚拉丝而成的含碱量较高的纤维纱，以确保产质量量。
The third layer: FRP maintenance layer is made by mechanical wet winding. Its function is to protect the polyurethane insulation layer from mechanical hard damage, and the second is anti-corrosion and waterproof. It has good weather resistance, acid resistance and seawater resistance. However, rigid and semi-rigid unsaturated resins such as 306, 191, 189, 196, etc., must be used for the resin. Glass fibers and cloth must be made of medium and low alkali fibre yarn drawn by platinum clamp pot or tank kiln. The high alkali content fibre yarn drawn by earthen pot must be restrained to ensure the quality of production.
黄夹克保温钢管常用的保温材料是硬质聚氨脂泡沫塑料，适用温度为－185～120℃。这种材料质地松软，为进步其强度，在隔热层外面加敷一层高密度聚乙烯层，构成复合材料结构，以防止公开水渗入保温层内。如此，引见就黄夹克保温管的作用、特性和应用范畴方面就尤为重要。
The heat preservation material commonly used in yellow jacket heat preservation pipe is rigid polyurethane foam plastic, and the applicable temperature is - 185 - 120 C. In order to improve its strength, a layer of high density polyethylene (HDPE) is added outside the insulation layer to form a composite structure to prevent the open water from penetrating into the insulation layer. Therefore, it is particularly important to introduce the function, characteristics and application scope of yellow jacket insulation pipe.
This article is published by the black jacket straight seam steel pipe finishing, do you know about these contents? For more information, please click: http://www.sdhpgy.com, we will have more wonderful content for you to see.
