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The insulation layer is made of rigid polyurethane foam with density from 60kg/m3 to 80kg/m3, which fully fills the gap between steel pipe and casing and has a certain bonding strength, so that a solid whole is formed among steel pipe, outer casing and insulation layer. Polyurethane directly buried thermal insulation pipe foam has good mechanical properties and thermal insulation properties, usually can withstand temperature 120 ℃ through modification or combination with other thermal insulation materials can withstand 180 ℃. The structural design of the new polyurethane foamed thermal insulation steel pipe is novel, and the insulation work of the joint is carried out on the site of the polyurethane foamed thermal insulation steel pipe project, including the installation of the joint outer casing, the connection and sealing between the joint outer casing and the supervisor, and the foaming work of the on-site joint, but it does not include the welding of the joint part of the steel pipe.
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Polyurethane thermal insulation pipe factory is a labor-intensive industry. With the continuous improvement of the status of our country, Yongkang, as the hometown of polyurethane thermal insulation pipe factory, has once become the gathering place of polyurethane thermal insulation pipe factory by virtue of the traditional competitive advantage of low cost. It includes the installation of the joint outer casing, the connection and sealing of the joint outer casing with the supervisor and the foaming work of the on-site joint, but does not include the welding of the joint part of the steel pipe. (1) method? Sleeve joint, in this way, the joint casing is made of the same material as the prefabricated thermal insulation pipe casing, and the polyethylene casing with density is connected and sealed by heat shrinkable belt between the polyethylene joint casing and the main pipe to ensure the watertightness of the joint.
Thermal insulation projects in petroleum, chemical, aerospace, military shi, central heating, central air conditioning, municipal and other pipelines. Matters needing attention in the construction of prefabricated directly buried insulation pipe mending method: the soaking of groundwater and Rain Water should be avoided during construction. If the end is inadvertently immersed in water, drying treatment should be done before connecting the jacket. The pipe should be stored in a flat site, neatly placed, and the height should be less than m. Pipe hoisting is light and light, collision and throwing are prohibited, and straight hoisting of steel wire rope is prohibited. Insulation layer and anti-corrosion coating should avoid direct contact with flame. For on-site installation, please follow the following procedures: pipe trench excavation-base treatment (drainage, sand cushion)-lower pipe-steel pipe welding-inspection (water pressure)-installation (pressure test)-foaming-sealing foam cell. Joint installation-the company can send personnel to the project site to carry out the heat preservation work of the joint, including the installation of the joint outer casing, the connection and sealing of the joint outer casing with the supervisor and the foaming work of the on-site joint.
Delamination and other shortcomings, the protective layer has a variety of methods (the following dilution loose ethylene and FRP protective layer) can be blocked? The joint shall be guaranteed to be conformable, tight and waterproof. First of all, the directly buried insulation pipe should be tested to take a look at the surface quality of the tube. if it is found that obvious depressions or some obvious damage should be improved in time, the manufacturer of prefabricated directly buried insulation pipe said: it is necessary to pay attention to some details in the acceptance work. The detection of directly buried insulation pipe involves many aspects, and it is recommended that before acceptance of directly buried insulation pipe. The connection and sealing of the outer casing of the joint with the supervisor and the foaming work of the on-site joint, but does not include the welding of the steel pipe of the joint. The main results are as follows: (1) the sleeve joint is made of the same material and density as the prefabricated thermal insulation pipe casing. The installation of the outer sleeve of the polyethylene joint and the main pipe shall be carried out by heat shrinkage belt.
After the contract was signed, Mr. Li paid according to the contract. When the room was handed in for acceptance in October 2019, Mr. Li said that he was urged by the supervisor to sign it before he could check it out. Unexpectedly, it was found that there were some problems in the process of painting latex paint on the wall, such as the circuit was not installed and the line was directly buried in the wall, the balcony was not waterproof, and the toilet was not soundproof. “at that time, the Industry Peak Decoration Company introduced that the soundproof cotton bag in the bathroom was their main hit, but other companies did not have it. as a result, the silent sewers in the two bathrooms were not dealt with, leaking two obvious holes.” Ms. Ni said that the peak of finding a career is to do a better job of hidden projects, but the result is at sixes and sevens.
In order to promote the construction of incorruptible culture and create an incorruptible cultural atmosphere, Guangzhou discipline inspection and supervision organs promote the promotion of incorruptible culture into the urban landscape and create a “clean landmark” around the masses. For example, the Supervisory Committee of the discipline Inspection Commission of Yuexiu District has integrated 31 red revolutionary sites, 4 national red tourism classic scenic spots and 19 patriotic education bases to create a “walking incorruptible culture classroom.” relying on Yongqingfang, thirteen lines, Pantang Wuyue, Lizhi Wan Chung and other historical and cultural districts, the Supervisory Committee of the discipline Inspection Commission of Liwan District has organized clean and honest activities. With the help of brands such as “Luogang Xiangxue” and “Huangpu Hong” Lingtou Tea Garden, Huangpu District discipline Inspection Commission has created incorruptible cultural theme parks such as “Qingmei Garden” and “Qingfeng Tea Garden”. The “construction drawing” of the construction of incorruptible culture in Guangzhou is becoming a “real picture” step by step.
High temperature thermal insulation material can effectively prevent the occurrence of thermal bridge, and there is no need to add reinforced concrete structure in construction. The relative fixation of the inner and outer steel flanges of the directly buried foam insulation spiral pipe can bear enough axial thrust according to the design requirements, which can fully ensure the safe operation of the whole pipeline. ?? It includes the installation of the joint outer casing, the connection and sealing of the joint outer casing with the supervisor and the foaming work of the on-site joint, but does not include the welding of the steel pipe of the joint part. (1) method? Sleeve joint, in this way, the joint casing is made of the same material as the prefabricated thermal insulation pipe casing, and the polyethylene casing is connected and sealed with a heat shrinkable belt between the polyethylene joint casing and the main pipe to ensure the watertightness of the joint. Then the joint foaming is carried out on the foaming hole on the joint casing, and after the foaming is completed, the foaming hole is sealed by patch or hot melt welding.