Polyurethane foam insulation pipe with black jacket sheath is suitable for conveying steam with temperature between 150 ℃ and 350 ℃ and working pressure less than 1.6Mpa. The above knowledge will certainly bring a lot of help to your work. High pressure polyurethane foaming machine is used to remove rust on the outer surface of the steel pipe, and corona treatment is carried out on the outer surface of the external protection pipe, which improves the bonding energy of the insulation pipe. This paper is composed of polyurethane insulation pipe. Production process of polyurethane direct buried thermal insulation steel pipe with steel sleeve and steel steam insulation; polyurethane foam insulation has been used in many occasions. Low thermal conductivity and low water absorption, together with insulation layer and high-density polyethylene or glass fiber reinforced plastic protective shell with good waterproof function outside, have changed the situation of "wearing wet cotton padded jacket" in traditional trench laying heat supply pipeline, greatly reducing the overall heat loss of heating pipe. The heat loss of heat supply network is 2%, less than 10%. In today's life.

漏水的準(zhǔn)確位置及滲漏程度的大小，保溫鋼管中使用保溫材料可以保暖隔音，提高居住的舒適度，有利于減排，概述聚氨酯發(fā)泡保溫管自三十年代聚氨酯合成材料誕生以來，一直作為一種優(yōu)良的絕熱保溫材料而得到迅速發(fā)展。 ④本標(biāo)準(zhǔn)規(guī)定的測(cè)試方法適用于對(duì)供熱管道彎頭,三通等管件以及預(yù)制保溫管接口部位保溫結(jié)構(gòu)散熱損失的測(cè)試，⑤可根據(jù)現(xiàn)場(chǎng)條件和保溫結(jié)構(gòu)情況,及測(cè)試等級(jí)要求,選擇不同測(cè)試方法,或同時(shí)選用幾種方法進(jìn)行測(cè)試，聚氨酯泡沫和高密度聚乙烯加工而成的。 聚氨酯保溫鋼管保溫層:采用硬質(zhì)聚氨酯泡沫塑料，聚氨酯保溫鋼管保護(hù)殼:采用高密度聚乙烯或玻璃鋼，聚氨酯保溫鋼管滲漏報(bào)警線:制造高溫預(yù)制直埋保溫管時(shí)，在靠近鋼管的保溫層中，埋設(shè)有報(bào)警線，一旦管道某處發(fā)生滲漏。

The accurate location of water leakage and the size of leakage degree, the use of thermal insulation materials in thermal insulation steel pipe can keep warm and sound insulation, improve the comfort of living, and is conducive to energy conservation and emission reduction. Since the birth of polyurethane composite materials in the 1930s, polyurethane foam insulation pipe has been developing rapidly as an excellent thermal insulation material. 4. The test method specified in this standard is applicable to the test of heat loss of heat insulation structure of elbow, three links and other parts of heating pipes, and the insulation structure of the prefabricated insulation pipe. 5. According to the conditions of the site, the insulation structure and the requirements of the test level, different test methods should be chosen, or several methods should be chosen for testing at the same time, and polyurethane foam and high density polyethylene can be processed. Polyurethane insulation steel pipe insulation layer: rigid polyurethane foam plastic, polyurethane insulation steel pipe protective shell: use high density polyethylene or glass steel, polyurethane insulation pipe leakage alarm line: when manufacturing high temperature prefabricated directly buried insulation pipe, in the insulation layer near the steel pipe, buried alarm line, once the pipeline leakage occurs.

溫度已經(jīng)能夠達(dá)到了-70℃—160℃的溫度范圍，不構(gòu)成污染；離明火自熄，且燃燒時(shí)只炭化不滴淌，炭化層尺寸和外形一般不變，能有效隔斷空氣的進(jìn)入，阻火勢(shì)的蔓延，防火性能好。直埋保溫管主要是由工作管、保溫層、聚乙烯外護(hù)管組成的，被廣泛應(yīng)用于供冷、供熱領(lǐng)域及輸送領(lǐng)域內(nèi)的防腐絕熱保溫管道工程，輸送介質(zhì)一般為油類及水等液態(tài)物體。在進(jìn)行合理選用,施工上、可靠、經(jīng)濟(jì)。聚氨酯為大分子鏈中含有氨酯型重復(fù)結(jié)構(gòu)單元的一類聚合物，全稱為聚酸酯，英文全稱為polyurethane,簡(jiǎn)稱P。保證外護(hù)管表面保持常溫，阻隔，反射層:保證有機(jī)泡沫材料不進(jìn)入無機(jī)硬質(zhì)耐高溫層,反射耐高溫層部分熱量，無機(jī)硬質(zhì)保溫層:耐高溫，保證與有機(jī)保溫層之間的界面溫。

The temperature has reached the temperature range of - 70 ℃ - 160 ℃, which does not constitute pollution; the open flame can extinguish itself, and only carbonization does not drip during combustion, and the size and shape of carbonization layer are generally unchanged, which can effectively block the entry of air, prevent the spread of fire, and have good fire safety performance. Directly buried thermal insulation pipe is mainly composed of working pipe, thermal insulation layer and polyethylene outer protection pipe, which is widely used in the field of cooling, heating and transportation in the field of anti-corrosion and thermal insulation pipeline engineering. The transmission medium is generally oil, water and other liquid objects. In the reasonable selection, the construction is safe, reliable and economical. Polyurethane is a kind of polymer with urethane repeat structure unit in macromolecular chain, which is called poly (ester) or polyurethane (P). Ensure that the surface of the external protection tube is kept at normal temperature, barrier and reflective layer: ensure that the organic foam material does not enter the inorganic hard and high-temperature resistant layer, reflect some heat of the high temperature resistant layer, and the inorganic hard insulation layer: high temperature resistance, and ensures the interface temperature between the organic insulation layer.

這些方法效果好，效率高，綜合經(jīng)濟(jì)效益顯著，能有效的延長(zhǎng)預(yù)制聚氨酯保溫管的使用壽命，因而在近年來發(fā)展中，應(yīng)用發(fā)展非常迅速，產(chǎn)品執(zhí)行標(biāo)準(zhǔn)不同，涂塑參照GB/T120(給水涂塑復(fù)合鋼管)，而塑塑參照GB/T136(給水襯塑復(fù)合鋼管)。 這樣子連系三者功用可以顯著前進(jìn)了防腐管道的三百六十度質(zhì)量，具有著耐化學(xué)腐蝕，耐陰極剝離，耐機(jī)械損壞功用的特征，且3PE防腐鋼管代價(jià)適內(nèi)執(zhí)行標(biāo)準(zhǔn)，標(biāo)準(zhǔn)主要規(guī)范聚乙烯與高密度聚乙烯為主，維卡軟化點(diǎn)定為不高于110℃,外防腐層的厚度按以低。 高密度聚乙烯外護(hù)層聚氨酯保溫管，聚氨酯保溫管作為當(dāng)今各管道輸送與應(yīng)用鋼外護(hù)層聚氨酯保溫管等,其他是遵照輸送介質(zhì)的不相同劃分成地埋硬質(zhì)聚氨酯泡沫塑料防腐保溫管，蒸氣直埋聚氨酯復(fù)合預(yù)制保溫管和耐高溫聚氨酯保溫管等。

These methods have good removal effect, high efficiency, significant comprehensive economic benefits, and can effectively extend the service life of prefabricated polyurethane insulation pipe. Therefore, in recent years, the application and development are very rapid, and the product implementation standards are different. The plastic coating refers to GB / T120 (water supply plastic coated composite steel pipe), while the plastic reference GB / t136 (water supply plastic lined composite steel pipe). In this way, the three functions can significantly improve the 360 degree quality of anti-corrosion pipeline, which has the characteristics of chemical corrosion resistance, cathodic stripping resistance and mechanical damage resistance. Moreover, the cost of 3PE anti-corrosion steel pipe is suitable for the implementation of the standard. The main specification of the standard is polyethylene and high-density polyethylene. The Vicat softening point is set at no higher than 110 ℃, and the thickness of the external anti-corrosion coating is lower. High density polyethylene external insulation polyurethane insulation pipe, polyurethane insulation pipe as today's energy saving pipeline transportation and application of steel outer sheath polyurethane insulation pipe, etc., other are according to the different transport medium is divided into buried rigid polyurethane foam plastic anticorrosive insulation pipe, steam directly buried polyurethane composite prefabricated insulation pipe and high temperature polyurethane insulation pipe.

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