FRP pressure pipeline construction method

Object. Flange contact must ensure that the flatness is symmetrical and uniform. After the inspection is correct, the flange bolts should be reinforced. The tightening bolts must be strictly symmetrical. Do not apply force on one side to avoid damage to the flange. The nut should be flattened with a spring washer.

Glass steel pipe elbows, tee installation and special parts installation requirements. The glass steel pipe elbow and the three-way installation method are the same as before, but the support must be added at the place where it is located and fixed by the pipe clamp. When the glass steel pipe is connected with the metal flange valve, the metal flange and the valve end should be supported. In order to prevent the FRP pipe from being deformed and broken due to temperature changes during use, the expansion joint must be installed strictly according to the design drawings or specifications. If the position of the expansion joint is changed, it should be allowed by the design department. The installation slope of the FRP pipe should not be too large. A fixed thrust seat shall be added according to the specifications to prevent the pipe from being broken due to its own weight. The thrust seat is placed in the soil without looseness, and there is enough time for the concrete to solidify before the pipe is pressure tested.

Pipe pressure test. When the main body of the pipeline and all equipment are installed in place, the construction of the ancillary structures is completed, and the overall strength of the pipeline can be tested after the pressure source or drainage facilities are ready. The pressure test medium is clear water. The test length of the steel interface pipe is generally 500800m, and the flexible socket connection can be used for overall pressure test. The pressure test pressure is 1.25 times the working pressure. When the pressure is applied, the test pressure should be gradually increased, and the primary pressure rise does not exceed 0. 5MPa. Strength test pressure regulation for 10min, pressure gauge drop not more than 0.05MPa is qualified, otherwise it should be found that the remedial measures are taken after the second pressure test, such as in the second pressure test, in a test pressure leak and repaired parts In case of leakage, the pipe section must be replaced. The length of the replacement pipe section is generally twice the diameter of the pipe. During the pressure test, if it is found that there are two or more cracks in one section, the pipe section must be replaced within a distance of 150 mm.

Where the glass steel pipe pressure test leaks, it should be promptly contacted by the product supplier to be repaired by the factory.

Pipe trench backfilling. After the pipeline is pressure tested, the trenches are backfilled. When the trench is backfilled, all the pipelines must be uniformly placed on the stable base of the base. The backfilling must be carried out manually on both sides of the pipeline. The thickness of one layer is not more than 300mm. After manual backfilling is more than 1000mm, the mechanical backfill can be used. There must be no hard objects larger than 25mm in diameter during backfilling.

Project acceptance. After the pipeline construction of the FRP pipeline project and the installation of the valve are completed, the inspection and acceptance shall be organized in time. After passing the test, the pressure test, backfilling and acceptance can be carried out. Therefore, the various records of the division and sub-project acceptance must be completed in a timely, complete and accurate manner and approved by Party A.

(2000-12-07 edited Fan Yuhua) (Continued from page 32) This part of the hydrocarbon composition will slowly gather in the tube wall to form a thermal insulation film, the result is that the cold-changing effect is getting worse and worse until the last cold change . As the pressure of the gas source well decreases, the partial pressure of water in the CO2 rises, and the problem of water blockage occurs when the refrigerant temperature of the C2 condenser is lower than 0*c. In order to solve this problem, we consulted a large amount of information and cooperated with Nanjing University of Chemical Technology to develop the current deoiling, based on the high-pressure physical property data of the gas source well C2 and the successful experience of the Huangqiao gas field, combined with the existing CO2 gas treatment process. Dehydration technology change process. The technical transformation process is formulated for the oil content, water content rise and high pressure physical properties of C2 in the CO2 gas source well. The principle is to use the cryogenic rectification method to remove the oil and water in the CO2 and achieve a certain precision to ensure the C2 condenser. The pipe process does not block, so that the operation of the entire system remains stable and normal.

(2) Feasibility study on the technical process of deoiling and dehydration. Before the deoiling and dewatering technical transformation process was determined, the existing process of the C2 treatment station was comprehensively analyzed, and the material and energy balance of the whole station was recalculated in combination with the technical transformation process. It can be seen from the calculation results that the CO2 dehydration and deoiling technical transformation process can adapt to the gas source well pressure range of 8.5MPa3.0MPa, and can fully utilize the process and equipment of the existing CO2 treatment station, through the cryogenic rectification process. Control the return flow of the deoiling tower to remove different percentages of oil and water content (oil content, water content <1%) in the gas source for purification purposes; and pass the energy contained in the CO2 dryer at high water pressure The adsorption of a special molecular sieve which completely adsorbs H2O and does not contribute to C2 improves the separation precision of water and completes the process of further dehydration. It can be seen that the C2 deoiling and dewatering technology reform process is feasible.

For the treatment process of C2 gas produced by the gas source well, it is different from the C2 treatment process in the flue gas and the tail gas of the petrochemical production plant. The former has different technical parameters corresponding to the degree of exploitation of the gas source well, while the latter Almost unchanged. Therefore, with the in-depth development of key national key projects, research and development of C2 gas treatment process with economical rationality, adapting to changes in gas source, meeting the needs of C2 mine test site, and having Jiangsu oilfield characteristics and promoting value is the focus of future work. Where. To this end, we must strengthen theoretical research work, while focusing on on-site implementation, to find regular things, in order to further guide future work.

(2000-12-07 Editor Wang Dexiang) Cha Shiqing selected products

Galvanized Roller Shutter Door

Using advanced hot-dip galvanized material , precision roll forming production process, polyurethane foam that free of hydrofluorocarbon inside door, light weight, high strength, appearance nice. The doors have advantages of tamper anti-theft , noise isolation thermal insulation and corrosion resistance;the doors are widely used in shops, garages, houses, supermarkets, warehouses and industrial plants,etc.

Depending on the characteristics of the buildings,we can choose interior, exterior and intermediate three different installation ways, doors stay in the upper part of door after rolling up , this could save garage space, and also could keep the garage clean and beautiful by prevent the mud, rain and snow ,etc going into the garage.

Galvanized Roller Shutter Door,Standard Galvanized Roller Shutter Door,Automatic Galvanized Roller Shutter Door,Steel Roller Shutter Safe Door

Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.selfrepairinghighspeeddoor.com