保溫管亦稱預制保溫管件，是一種保溫性能好，加可靠，工程造價低的直埋預制保溫管。有效的處置了城鎮(zhèn)集中供熱中－高溫輸熱用預制保溫管件的保溫、滑動潤滑和暴露管端的防水問題。保溫管件不只具有傳統(tǒng)地溝和架空敷設管道難以比擬的技術、適用性能，而且還具有顯著的社會效益和經(jīng)濟效益，也是供熱的有力措施。保溫管件采用直埋供熱管道技術，標志著供熱管道技術展開曾經(jīng)進入了新的起點。
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.
一層：工作鋼管層，根據(jù)設計和客戶的懇求普通選用無縫管(GB8163)螺旋焊管（GB9711;SY/T5038）和直縫焊管(GB3092)。鋼管表面經(jīng)過的拋丸除銹工藝處置后，鋼管除銹等級可達GB8923-標準中的Sa2級，表面粗糙度可達GB6060.5標準中R=12.5微米。鋼管表面除污除銹后涂刷一層防腐材料，其作用一是防水，二是改善保溫層與鋼管之間的粘接表面，使它構成一個整體。
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.
第二層：聚氨酯保溫層，用高壓發(fā)泡機在鋼管于特制鋼模具之間構成的空腔中一次性注入硬質聚氨酯泡沫塑料原液而成。即俗稱的“模具發(fā)泡工藝"。聚氨酯泡沫能否發(fā)滿，有任何質量問題便于直接檢驗。其作用一是防水，而是保溫，三是支撐熱網(wǎng)自重。當保送介質溫度為：-50℃—120℃時，選用硬質塑料做保溫層；當保送介質溫度為：-50℃—150℃時，選用硬質塑料做保溫層。
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.
第三層：玻璃鋼維護層用機械濕法纏繞制造而成。其作用一是維護聚氨酯保溫層免遭機械硬物破壞，二是防腐防水，它的耐氣候性、耐酸性、耐海水性較好，但是，樹脂必需用306#、191#、189#、196#等剛性和半剛性不飽和樹脂。玻璃纖維及布必需用白金鉗堝或池窯拉絲而成的中低堿纖維紗，遏止運用土堝拉絲而成的含堿量較高的纖維紗，以確保產(chǎn)質量量。
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.
黃夾克保溫鋼管常用的保溫材料是硬質聚氨脂泡沫塑料，適用溫度為－185～120℃。這種材料質地松軟，為進步其強度，在隔熱層外面加敷一層高密度聚乙烯層，構成復合材料結構，以防止公開水滲入保溫層內(nèi)。如此，引見就黃夾克保溫管的作用、特性和應用范疇方面就尤為重要。
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.
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