- 规格:
- 108
- 壁厚:
- 4
- 长度:
- 12
According to reports, in order to accurately grasp the price quotation and laying status of anti-corrosion steel pipes for underground pipelines in built-up areas of Tianshui City, meet the needs of urban planning, construction and management, make full use of underground space, and avoid problems due to anti-corrosion steel pipes during urban construction Factors such as incomplete price quotation information or inconsistency with the current situation have led to accidents of digging and breaking anti-corrosion steel pipes, causing unnecessary economic losses and inconvenience to the country and citizens. The Municipal Housing and Urban-Rural Development Bureau has decided to impose a price quotation on the built-up areas of our city. A comprehensive survey was conducted on the price quotations of anti-corrosion steel pipes for underground pipelines on primary and secondary roads. Based on the relevant information on the price quotations of anti-corrosion steel pipes for pipelines obtained from the census, computer technology was used to establish a comprehensive pipe network information system for price quotations of anti-corrosion steel pipes for underground pipelines in Tianshui City. The construction of urban digital management in our city provides basic data services.
Combining the interfacial properties and chemical resistance of sintered epoxy powder coating with the mechanical protection properties of extruded polyethylene anti-corrosion coating significantly improves their respective functions. Therefore, it is very superior as an outer protective layer for buried pipelines. According to relevant materials, three layers can extend the service life of buried pipelines to 10 years. Now, it is internationally considered to be an excellent anti-corrosion technology for external pipelines. In China, three layers have been used first in oil and gas systems. China's built Shaanxi-Beijing natural gas pipeline and Kushan-Shanghai oil pipeline, as well as the recent national key project West-East Gas Pipeline nearly one kilometer long, all use three-layer external anti-corrosion coatings.
The polyethylene three-layer structural protective layer, also known as three-layer, is an advanced anti-corrosion technology introduced from abroad in recent years. Its full name is sintered epoxy/extruded polyethylene structural protective layer. The structure consists of the following three layers: the bottom layer is sintered epoxy, the middle layer is adhesive, and the surface layer is extruded polyethylene. The total thickness of the protective layer is approx. In the three-layer structure, the main function of the sintered epoxy powder coating is to form a continuous coating film, which is directly bonded to the surface of the steel pipe. It has good chemical corrosion resistance and cathodic stripping resistance and the active base of the middle layer adhesive. The group reaction forms a chemical bond, ensuring that the overall anti-corrosion layer has good adhesion at higher temperatures. The middle layer is usually a copolymer adhesive whose main component is polyolefin. Currently, vinyl copolymer adhesive is widely used. The polar functional groups of the copolymer adhesive and the epoxy groups of the fused epoxy powder coating can react to form hydrogen bonds or chemical bonds, allowing the middle layer to form a good bond with the bottom layer rather than the polar ethylene part to the surface layer. Ethylene has good affinity, so the middle layer and the surface layer also have good bonding properties. The main function of the polyethylene surface layer is mechanical protection and anti-corrosion, which has the same function as the traditional two-layer polyethylene anti-corrosion layer.
Since the Tianshui City Underground Pipeline Anti-corrosion Steel Pipe Price Quotation Survey and Measurement Project was implemented in January this year, as of March 2019, a total of about 100 kilometers of pipeline anti-corrosion steel pipe price quotation has been completed. Among them, the pipeline anti-corrosion steel pipe price quotation exploration in Qinzhou District has been completed. The work has been completed. The field detection work of pipeline anti-corrosion steel pipe price quotation in Maiji District has been partially completed. It is planned to complete the city's pipeline anti-corrosion steel pipe price quotation field detection work by the end of the month, and the pipeline anti-corrosion steel pipe price quotation exploration data will be stored in the industry. It is carried out at the same time as the field exploration work, and all field exploration data are entered into the database simultaneously. At the same time, the relevant construction work of the price quotation information management system for anti-corrosion steel pipes for underground pipelines in Tianshui City has been carried out at the beginning of the month. The proposed price quotation information management system for anti-corrosion steel pipes for underground pipelines in Tianshui City is a comprehensive survey of the spatial distribution of price quotations for anti-corrosion steel pipes for underground pipelines in Tianshui City. On the basis of the characteristics and attributes, combined with urban construction planning and management, a highly comprehensive and current comprehensive price quotation management system for anti-corrosion steel pipes for underground pipelines has been established. Make full use of advanced technical database technology, computer network technology and three-dimensional virtual display technology to build an underground pipeline anti-corrosion steel pipe price quotation information management system and an underground pipeline anti-corrosion steel pipe price quotation three-dimensional visual display system to realize the price quotation data of various pipeline anti-corrosion steel pipes in the city. Inbound management displays query statistics analysis and update.