黑夾克保溫鋼管管材包括螺旋鋼管，直縫鋼管和無縫鋼管，外層為黑色聚乙烯資料的叫做黑夾克保溫管。
Black jacket insulation steel pipe includes spiral steel pipe, straight seam steel pipe and seamless steel pipe. The outer layer of black polyethylene material is called black jacket insulation pipe.
黑夾克保溫鋼管用高壓發(fā)泡機在鋼管與外護層之間構(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，再用聚乙烯停止鋼管外表的處置，構(gòu)成外層的維護層。
Black jacket insulating steel pipe is made by injecting rigid polyurethane foam plastics into the cavity formed by high pressure foamer between the steel pipe and the outer protective layer at one time, and then using polyethylene to stop the disposal of the outer surface of the steel pipe to form the outermost maintenance layer.
聚乙烯外殼直埋保溫管高密度聚乙烯保溫管直埋式預制保溫管由保送介質(zhì)的鋼管、聚氨酯硬質(zhì)泡沫保溫層和高密度聚已烯外套管嚴密分離而成，直埋保溫管主要用于城鎮(zhèn)集中供熱管網(wǎng)，石油保送管線，高寒地域輸水管線及產(chǎn)區(qū)工業(yè)管道工程。
Polyethylene buried directly buried heat insulation pipes, high density polyethylene insulation pipes, directly buried precast heat insulation pipes are tightly separated from the steel pipes, polyurethane rigid foam insulation layer and high density polyethylenes coat pipe, and directly buried insulation pipes are mainly used for urban central heating network, oil delivery pipeline, high cold area water conveyance pipeline and production area. Industrial Pipeline Engineering.
黑夾克聚氨酯保溫鋼管由于聚氨酯硬質(zhì)泡沫保溫層嚴密地粘結(jié)在鋼管外皮，隔絕了空氣和水的滲入，能起到良好的防腐作用。同時它的發(fā)泡孔都是閉合的，吸水性很小。高密度聚乙烯外殼、玻璃鋼外殼均具有良好的防腐、絕緣和機械性能。
The black jacket polyurethane heat preservation steel pipe is tightly adhered to the outer skin of the steel pipe because of the rigid polyurethane foam insulation layer, which can isolate the infiltration of air and water, and can play a good anti-corrosive role. At the same time, its foaming holes are closed and its water absorption is very small. High density polyethylene shell and FRP shell have good anti-corrosion, insulation and mechanical properties.
為了加強夾克層與泡沫層間的粘結(jié)力，夾克管內(nèi)外表需求停止處置。實驗時，采用內(nèi)壁噴砂粗化和電暈極化處置方法。經(jīng)測試，這兩種方式，關(guān)于增加夾克層與泡沫層間的粘結(jié)力效果相當。但是，運用電暈極化處置效率更高，質(zhì)量更易控制。依據(jù)中石油管道科學研討院的研討成果，采用聚乙烯管內(nèi)壁電暈處置后，泡沫與夾克的粘結(jié)力可到達0.70～1.42MPa，遠遠超越泡沫自身強度。
In order to strengthen the cohesive force between the jacket layer and the foam layer, the inside and outside surface of the jacket pipe is discontinued. In the experiment, sand blasting coarsening and corona polarization were used. It is tested that these two methods are equivalent to increasing the cohesive force between the jacket layer and the foam layer. However, the use of corona polarization disposal is more efficient and the quality is easier to control. According to the research results of the China Petroleum Pipeline Research Institute, the cohesive force of the foam and jacket can reach 0.70 to 1.42MPa after corona treatment of the inner wall of polyethylene pipe, far exceeding the strength of the foam itself.
但是實踐上，經(jīng)過檢測，我們運用的經(jīng)過電暈處置后工業(yè)化消費的夾克管內(nèi)壁與泡沫的粘結(jié)力達不到以上數(shù)值，但能夠到達相關(guān)標準請求的0.05N/m值，從幾次實驗和幾個工程的應用狀況看，滿足這個值在工程上是能夠承受的。在實踐工作中，需求進一步研討如何進步極化水平，以到達更好的內(nèi)壁粘結(jié)效果。
However, in practice, after testing, the cohesive force of the inner wall and foam of the jacket pipe which has been consumed by corona after industrial consumption can not reach the above value, but it can reach the 0.05N/m value of the relevant standard request. From several experiments and several engineering applications, this value can be accepted in engineering. In practice, it is necessary to further study how to improve the polarization level in order to achieve better bonding effect.
為了加強夾克層與配重層間的粘結(jié)力，必需對夾克管表面面停止粗化處置。開端采用電動鋼絲刷對夾克管外壁停止人工打磨，外表質(zhì)量不容易控制。如今采用機械刀具自動刻槽的方法停止處置，經(jīng)檢測打磨后夾克層與配重層間的抗剪切強度可到達0.2MPa左右。但是，假如混凝土層發(fā)作細微開裂（這是允許的），那么部分的混凝土依然可能發(fā)作滑移，所以如何更好地停止夾克管外壁的粗化與避免開裂（特別是端部開裂）依然是影響質(zhì)量的關(guān)鍵。
In order to strengthen the bonding force between jacket layer and counterweight layer, it is necessary to stop coarsening the surface of jacket tube. The outer wall of jacket pipe is stopped by manual polishing with electric wire brush at the beginning, and the appearance quality is not easy to control. At present, mechanical tool grooving method is used to stop disposal. After testing and grinding, the shear strength between jacket layer and counterweight layer can reach about 0.2 MPa. However, if the concrete layer cracks slightly (which is allowed), then part of the concrete may still slip, so how to better stop the coarsening of the outer wall of jacket pipe and avoid cracking (especially cracking at the end) is still the key to affect the quality.
With a brief summary of the straight seam steel pipe on the black jacket, I hope it will be helpful to our customers. If you don't understand or ask for help, please click on our official website: http://www.qndr49.cn or call for consultation. We will try our best to solve it for you.
