Hebei Longdu Pipeline learned that polyurethane foam insulation spiral steel pipe manufacturers shape the quality of the industry to open the market with quality
Prefabricated direct buried insulation pipe is more convenient and safe to apply
What can be done to better play the role of prefabricated direct buried insulation pipe? Of course, it is easy to use and safe. Today, Xiaobian will come to tell you about it.
In addition to the high-temperature prefabricated direct-buried insulation pipes produced outside China, there are leak alarm lines. Once the pipeline leaks somewhere, the transmission of the alarm line can show the accurate leakage of water and water leakage on the special inspection instruments. The location and the degree of leakage, in order to inform the inspecting personnel to quickly deal with the leaking pipe section to ensure the safe operation of the heating pipe network. The domestically produced insulation pipe is currently equipped with a leakage alarm line, and the prefabricated direct buried insulation pipe needs to be filled with this blank.
The high-temperature prefabricated direct-buried insulation pipe not only has the advanced technology and practical performance that is difficult to compare with the traditional trench and overhead laying pipeline. The high-temperature prefabricated direct-buried thermal insulation pipe is composed of steel pipe, FRP inner sheath and glass fiber reinforced plastic shell, and is characterized by: high temperature resistance Insulation insulation layer, leakage alarm line: When manufacturing high temperature prefabricated direct buried insulation pipe, in the insulation layer close to the steel pipe, the prefabricated direct buried insulation pipe is buried with an alarm line. Once the pipe leaks somewhere, the transmission through the alarm line, It can alarm on the special detection instrument and display the exact position of the water leakage and the degree of leakage, so as to inform the maintenance personnel to quickly handle the leaking pipe section and ensure the safe operation of the heating network. Lubricating layer, elastic seal. The utility model effectively solves the problem of heat preservation, sliding lubrication and waterproofing of the exposed pipe end of the prefabricated direct buried thermal insulation pipe for the high temperature heat transfer of 130 ° C - 600 ° C in urban central heating. Prefabricated direct buried insulation pipe also has significant social and economic benefits, and is also a powerful measure for heating energy. The adoption of direct buried heating pipeline technology indicates that the development of China's heating pipeline technology has entered a new starting point. With the further improvement and development of this advanced technology, it is imperative to directly replace the trench and overhead of the heating pipeline.
With the expansion of the application range of prefabricated direct buried insulation pipes, people have begun to pay attention to how to use it more safely and conveniently. Now, if you remember the small series, you can use the prefabricated direct buried insulation pipe.
Pre-made direct buried insulation pipe repairing site construction problem answer
In the construction process of prefabricated direct buried insulation pipe, the most difficult and difficult problem is the construction of prefabricated direct buried insulation pipe. However, many construction workers are not sure how to deal with unexpected problems. Today, Rongbangxiao Edited to answer the on-site treatment measures for some problems that often occur at the construction site.
1. What are the methods for on-site filling of direct-buried plastic sleeve steel prefabricated insulation pipe?
The main function of the mouth is to tightly connect the gap to the mother tube to achieve the purpose of sealing and waterproofing. The following two methods are recommended: 1 diameter less than 500mm, sleeve sleeve filling method, which is easy to operate and low in cost; 2 diameter greater than 500mm, using electric heating sleeve to fill the mouth, although the cost is higher, but the project The quality is more guaranteed.
2. How to carry out on-site operation with sleeves?
Sleeve sleeves are usually determined based on the type of the parent tube and the length of the mouth. Generally speaking, the diameter of the sleeve tube is larger than that of the mother tube, and the length is about 20-30 cm longer than the length of the mouth. For example: the length of the 180mm diameter insulation tube is 30cm, and the sleeve tube is usually 190mm in diameter and 50-60cm in length.
Specific operation steps: 1 Before the steel pipe is welded, put the sleeve sleeve into the tube. After the steel tube is welded, slide the sleeve tube to the mouth. The balance at both ends is about the same. Both ends are sealed with heat shrinkable tape. 2 Open at one end of the sleeve tube. A 30mm diameter injection hole and the same end of the same size vent hole, the polyurethane material is evenly poured or injected with a casting machine, after the foaming is completed, it can be sealed with a special plug.
3. How to use the electric heating sleeve to repair the mouth?
First select the appropriate electric heating jacket (usually 200-500mm circumference is larger than the outer protective tube), and use a special electric hot-melt welding machine to heat the surrounding preset heating wire, usually for 20-40 minutes (determine the heat according to the material) Around the melting time), the hot-melt sleeve is bonded to the mother tube, and then the second step of the sleeve sleeve filling method is used for injection, and the special blockage can be used for sealing.
4. Straight-buried plastic sleeve steel prefabricated insulation pipe joint material, is it feasible to use glass fiber cloth and glass fiber reinforced plastic paint?
No. Because glass cloth and glass reinforced plastic are not the same material as polyethylene pipes, they cannot be sintered to each other. Even if the two are forcibly bonded together, the shrinkage will occur due to the difference in shrinkage rate, and cracks will occur, resulting in water seepage.
5. In the process of filling the mouth, how do the three-way, elbow and other pipe fittings carry out the heat preservation operation?
In the whole insulation pipe, the insulation of the three-way, elbow and other pipe fittings is very important, and the on-site production is more complicated, it is difficult to ensure the quality; it is recommended that the construction party put the three-way, elbow, compensator and other pipe fittings in the professional pipe insulation plant Luoyang Hanpu energy-saving prefabrication, and then welding with the straight pipe on-site, and then using the above method to fill the mouth, so as to ensure the quality of insulation and reduce the construction difficulty.
6. What should be paid attention to when hoisting, moving and storing the insulation pipe on site?
1 It must be hoisted by sling or other method that does not damage the insulation pipe. It is strictly forbidden to hoist directly with wire rope; during the loading and unloading process, collision, throwing and rolling on the ground are strictly prohibited.
2 The storage pipe stacking site shall meet the following requirements: the ground shall be level and free of debris such as gravel; the ground shall have sufficient carrying capacity to ensure that no collapse and dumping accidents occur after stacking;
3 The stacking height of the insulation pipe should not exceed 2.0m, and should not be exposed to the sun, rain and soak, and covered with tarpaulin when stored in the open air.