聚氨酯直埋保溫管合適保送在-50℃—150℃范圍內(nèi)的各種介質(zhì)的保溫保冷工程。它普遍應用于城市集中供熱、暖室、冷庫、煤礦、石油港口、化工等行業(yè)的保溫保冷工程。
Polyurethane direct buried insulating pipes are suitable for insulating and cooling engineering of various media in the range of - 50 ~150 ~C. It is widely used in urban central heating, heating room, cold storage, coal mine, petroleum port, chemical industry and other industries.
聚氨酯直埋保溫管從里到外分三層構(gòu)造
Three-layer structure of polyurethane direct-buried insulating pipe from inside to outside
一層：聚氨酯發(fā)泡保溫鋼管工作鋼管層 依據(jù)設計和客戶的請求普通選用無縫管(GB8163-87)螺旋焊管（GB9711-88;SY/T5038-92)和直縫焊管(GB3092-93)。鋼管外表經(jīng)過的拋丸除銹工藝處置后，鋼管除銹等級可達GB8923-1988規(guī)范中的Sa2級，外表粗糙度可達GB6060.5-88規(guī)范中R=12.5微米。
First layer: According to the design and customer's request, the polyurethane foamed insulating steel pipe working steel pipe layer generally chooses seamless pipe (GB8163-87), spiral welded pipe (GB9711-88; SY/T5038-92) and straight welded pipe (GB3092-93). After treatment by advanced shot peening rust removal process, the steel tube rust removal grade can reach Sa2 level in GB8923-1988 specification, and the surface roughness can reach R=12.5 micron in GB6060.5-88 specification.
第二層：聚氨酯發(fā)泡保溫鋼管聚氨酯保溫層 用高壓發(fā)泡機在鋼管于外護層之間構(gòu)成的空腔中一次性注入硬質(zhì)聚氨酯泡沫塑料原液而成。即俗稱的“管中管發(fā)泡工藝”。其作用一是防水，二是保溫，三是支撐熱網(wǎng)自重。當保送介質(zhì)溫度為：-50℃—120℃時，選用硬質(zhì)聚氨基脲酸酯泡沫塑料做保溫層。
Layer 2: Polyurethane foamed insulating steel pipe polyurethane insulating layer is made by one-time injection of rigid polyurethane foam plastics into the cavity formed between the steel pipe and the outer protective layer by high-pressure foaming machine. That is commonly known as "tube-in-tube foaming process". Its function is waterproof, heat preservation and self-weight support of heat network. The rigid polyurethane foam is chosen as insulation layer when the temperature of delivery medium is -50 ~120 ~C.
第三層：聚氨酯發(fā)泡保溫鋼管高密度聚乙烯維護層 預制成一定壁厚的黑色（黃色）塑料管材，其作用一是維護聚氨酯保溫層免遭機械硬物毀壞，
The third layer: polyurethane foamed insulating steel pipe high density polyethylene maintenance layer is prefabricated into a certain thickness of black (yellow) plastic pipe, its role is to maintain polyurethane insulation layer from mechanical hard damage.
二是防腐防水。
The second is anti-corrosion and waterproof.
聚氨酯發(fā)泡保溫鋼管聚氨酯泡沫能與各種資料停止結(jié)實的粘合，因而作為直埋管的保溫層簡直無需思索防腐層與之粘合的問題。聚氨酯保溫層的順應溫度為+120℃-196℃，短時（十幾小時）可達+190℃。假如用戶需長期溫度190度，我們可依據(jù)用戶需求用高溫料成型。
Polyurethane foam insulation pipe polyurethane foam can stop adhesion with all kinds of data. Therefore, as the insulation layer of directly buried pipe, there is no need to think about the problem of adhesion between anticorrosive coating. The compliance temperature of polyurethane insulation layer is + 120 C - 196 C, and can reach + 190 C in a short time (more than ten hours). If the user needs a long-term temperature of 190 degrees, we can use high-temperature materials to shape according to the user's needs.
保溫管普遍用于液體、氣體的保送管網(wǎng)， 化工管道保溫工程石油、化工、集中供熱熱網(wǎng)、空調(diào)通風管道、市政工程等。高溫預制直埋保溫管是一種保溫性能好，加平安牢靠，工程造價低的直埋預制保溫管。有效的處理了城鎮(zhèn)集中供熱中130℃－600℃高溫輸熱用預制直埋保溫管的保溫、滑動光滑和暴露管端的防水問題。高溫預制直埋保溫管不只具有傳統(tǒng)地溝和架空敷設管道難以比較的技術(shù)、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。高溫預制直埋保溫管采用直埋供熱管道技術(shù)，標志著供熱管道技術(shù)開展曾經(jīng)進入了新的起點
Insulation pipes are widely used in liquid and gas pipeline network, chemical pipeline thermal insulation engineering petroleum, chemical industry, central heating network, central air conditioning ventilation pipeline, municipal engineering, etc. The high temperature prefabricated direct-buried insulating pipe is a kind of direct-buried prefabricated insulating pipe with good thermal insulation performance, safety and reliability, and low cost. The problems of heat preservation, smooth sliding and waterproofing of exposed pipe ends of prefabricated directly buried insulating pipes for heat transfer at 130-600 (?) C in urban central heating are effectively solved. High temperature prefabricated directly buried insulation pipe not only has advanced technology and applicability which is difficult to compare with traditional trench and overhead pipeline laying, but also has remarkable social and economic benefits. It is also a powerful measure of heating energy saving. High temperature prefabricated directly buried insulating pipes adopt directly buried heating pipe technology, which indicates that the development of heating pipe technology in China has entered a new starting point.
保溫管是由鋼管、玻璃鋼內(nèi)護套、玻璃鋼外殼構(gòu)成，其特征是：還包括耐高溫絕熱保溫層、光滑層、彈性密封件。本適用新型有效的處理了城鎮(zhèn)集中供熱中130℃－600℃高溫輸熱用預制直埋保溫管的保溫、滑動光滑和暴露管端的防水問題。
The insulating pipe is composed of steel pipe, FRP inner sheath and FRP outer shell. It is characterized by high temperature insulating layer, smooth layer and elastic seals. The new type of heat preservation pipe can effectively deal with the problems of heat preservation, smooth sliding and waterproofing of exposed pipe ends of prefabricated directly buried heat preservation pipes used for heat transmission at 130-600 C in urban central heating.
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