With the continuous development of industrial technology, the requirements for pipe materials are getting higher and higher. As a new type of pipeline material, plastic-coated steel pipe has excellent corrosion resistance, environmental protection performance and long service life, so it has been widely used in various fields. As one of them, the manufacturing process of welded plastic-coated spiral steel pipe has also attracted much attention. Plastic-coated spiral steel pipe
1. Preparation of materials.
The main materials of welded plastic-coated spiral steel pipes include steel pipes, plastic powders and welding wires. In the manufacturing process, it is necessary to select high-quality steel pipes that meet the requirements to ensure that their surface is smooth, free of rust, scratches and other defects. At the same time, the selection of plastic powder is also very important, and it is necessary to select the appropriate plastic powder according to the specific use environment and requirements to ensure the adhesion and corrosion resistance of the coating.
2. Pretreatment.
Before formal manufacturing, the steel pipe needs to be pre-treated, including steps such as rust removal, degreasing, drying, etc. The purpose of these steps is to remove impurities and moisture from the surface of the steel pipe and to ensure the adhesion and durability of the coating.
3. Coating process.
The plastic coating process is the core link of the manufacturing of welded plastic-coated spiral steel pipes. In the plastic coating process, it is necessary to use professional plastic coating equipment to evenly spray the plastic powder on the surface of the steel pipe, and make it melt, level and solidify. The thickness and uniformity of the coating have a direct impact on the performance and service life of the steel pipe. Therefore, it is necessary to strictly control the thickness and uniformity of the coating in the plastic coating process to ensure the quality of the coating.
Fourth, welding process.
The welding process is a key link in the manufacture of welded plastic-coated spiral steel pipes. In the welding process, professional welding equipment needs to be used to dock and fuse the plastic-coated steel pipe according to the requirements to form a continuous pipe body. When welding, it is necessary to pay attention to the quality and aesthetics of the weld, and at the same time ensure that the coating is not damaged. In order to meet this requirement, a series of process measures need to be taken during the welding process, such as adjusting the welding parameters and controlling the weld temperature.
5. Quality inspection and finished product inspection.
After the manufacturing is completed, the welded plastic-coated spiral steel pipe needs to be inspected for quality and finished product. Quality inspection includes appearance inspection, size inspection, coating adhesion inspection, etc. The appearance inspection mainly checks whether the surface of the steel pipe is smooth, free of scratches, no bubbles and other defects;The size test mainly detects whether the length, outer diameter, wall thickness and other parameters of the steel pipe meet the requirementsThe coating adhesion test mainly tests whether the bond between the coating and the surface of the steel pipe is firm. Finished product inspection includes pressure test and bend test, etc. The pressure test mainly detects whether the pressure resistance of the steel pipe meets the requirementsThe bending test mainly detects whether the coating peels off when the steel pipe is bent.
Through strict quality inspection and finished product inspection, it can ensure that the quality and performance of welded plastic-coated spiral steel pipes meet the requirements, and provide a reliable guarantee for subsequent use.
6. Packaging and transportation.
Finally, qualified welded plastic-coated spiral steel pipes need to be packaged and shipped. The packaging materials should be moisture-proof and shock-proof materials to ensure that the steel pipe is not damaged during transportation. At the same time, the product specifications, quantity, production date and other information should be indicated on the packaging to facilitate subsequent traceability and management.
To sum up, the manufacturing process of welded plastic-coated spiral steel pipe involves multiple links and factors, each of which needs to be strictly controlled and optimized. By continuously improving the level of manufacturing technology and technological innovation capabilities, the performance and service life of welded plastic-coated spiral steel pipes can be further improved to meet the needs of different fields. At the same time, strengthening quality management and brand building is also an important way to promote the development of the welded plastic-coated spiral steel pipe industry.