Galvanized spiral steel pipe, national standard coated spiral steel pipe, 3pe anti-corrosion spiral steel pipe manufacturer

Description :

　　Your satisfaction with the external PE and internal EP anti-corrosion spiral steel pipe package for water transmission is truly the highest quality anti-corrosion pipeline for transportation. Both the anti-corrosion treatment technology inside and outside the pipeline has reached the current advanced level, and the service life can reach up to 50 years. The mechanism of corrosion of TPEP anti-corrosion steel pipes is that the metal is corroded due to the difference in electrode potential. When the metal undergoes electrochemical reactions, the parts with lower electrode potential are prone to lose electrons and form anodes; The area with higher electrode potential receives electrons and becomes the cathode. TPEP anti-corrosion steel pipe refers to a three-layer polyethylene outer wrapped and internally fused epoxy anti-corrosion steel pipe. He continues the advantages of traditional steel pipes, such as high strength, strong integrity, good plasticity, ability to withstand high external and internal pressures, and good adaptability to foundations. What is the typical service life of TPEP anti-corrosion spiral steel pipes according to the national standard price? Spiral steel pipes have no limit on their service life, which is mainly related to the operating environment and production process. In order to extend the service life of spiral steel pipes in poor operating environments, anti-corrosion measures are taken on the outer and inner walls of the pipes.

　　TPEP anti-corrosion steel pipe - external 3PE internal fusion bonded epoxy anti-corrosion steel pipe is an upgraded product based on the external single-layer polyethylene internal epoxy composite steel pipe, and is currently the anti-corrosion form of steel pipes for buried long-distance pipelines. It is the fourth generation large-diameter pipeline new anti-corrosion production line independently developed by Weifang Dongfang Steel Pipe. The outer wall adopts a three-layer structure anti-corrosion layer formed by hot melt bonding and winding technology, with a bottom layer of epoxy resin, a middle layer of adhesive, and an outer layer of polyethylene. The inner wall adopts a thermal spray epoxy powder anti-corrosion method, where the powder is uniformly coated on the surface of the pipe body after high-temperature heating and fusion, forming a steel plastic alloy layer, abbreviated as TPEP steel pipe (T, the first letter of three layers in English, PE refers to polyethylene, EP refers to epoxy resin). Greatly improved coating adhesion and thickness, enhanced resistance to bumps and corrosion. This product obtained a national utility model patent in 2009. Received the National Torch Project in 2010. TPEP steel pipes fill the gap in domestic steel pipe anti-corrosion, with a price similar to single-layer polyethylene internal fusion bonded epoxy composite steel pipes, and an increase in corrosion resistance by 3-5 times. Technical parameters Product specifications: Steel pipe Material: Q235 or Q345 Coating material: high-density polyethylene, food grade epoxy powder Common color: black outer wall, gray inner wall Coating thickness: 2.0-4.0mm outer wall, 0.35-0.5mm inner wall Coating method: simultaneous fusion wrapping and thermal spraying for one-time film formation. Product length: 12 meters, or specified regular pressure: 0.1Mpa -5.0Mpa Connection method: welding, joint filling method: lined with stainless steel without repair technology Application fields: long-distance water transmission pipelines, water conservancy industry, tap water industry.

　　The steel price has emerged from a trend of rising and falling, with the comprehensive price index of steel falling by 1.05% month on month. Looking at different varieties, the price index of long steel has fallen by 2.69%, and the price index of flat steel has risen by 1.03%. The comprehensive price index of iron ore increased by 6% month on month, with the imported ore price index rising by 5.13% and the domestic ore price index rising by 7.05%, which is basically in line with expectations. Looking ahead to the steel market in January, although there is room for further decline in steel prices, they are expected to stabilize and start a new volatile upward trend. Looking back at the steel market in 2017, in the repeated game between expectations and reality, the comprehensive price index of steel at the end of the year and the beginning of the year increased by 22.3%, and the annual average price even exceeded expectations by 43.5%. This not only surprised bears, but also made us, who were bullish on this year at the end of last year, fall short of expectations. Different commodities in the steel industry chain have also shown differentiation, with coal and coke both rising by over 60%, while the annual price of Australian iron ore has only increased by 21.8%. The steel industry has ushered in a long-awaited return to value, and mergers and acquisitions in the industry have also begun. Although the profitability of enterprises has shown significant improvement, the debt ratio of the entire industry is still around 68%. With China's vigorous development of advanced manufacturing industry, the development of the steel industry still has a long way to go.

　　Main production process of straight seam welded pipe: 1. Plate probing: After the steel plate used to manufacture large-diameter submerged arc welded straight seam steel pipes enters the production line, the full plate ultrasonic inspection is first carried out. The rear straight seam welded steel pipe is welded together and gas shielded welding (MAG) is used 6. Continuous welding 6. Internal welding: longitudinal multi wire submerged arc welding (* can be four wires) is used to weld on the inside of the straight seam steel pipe 7. External welding: longitudinal multi wire submerged arc welding is used to weld on the outside of the straight seam submerged arc welded steel pipe 8. Ultrasonic inspection I: inspection of the inner and outer welds of the straight seam welded steel pipe and the base materials on both sides of the weld 9. X-ray inspection I: X-ray inspection of the inner and outer welds Radiation industrial television inspection, using image processing system to ensure the sensitivity of flaw detection. 10. Diameter expansion: Expand the entire length of the submerged arc welded straight seam steel pipe to improve the dimensional accuracy of the steel pipe and improve the distribution of internal stress in the steel pipe Inspection of X-ray industrial television and filming of pipe end welds 15. Magnetic particle inspection of pipe ends: This inspection is carried out to detect pipe end defects 16. Anti corrosion and coating: Qualified steel pipes are subjected to anti-corrosion and coating according to user requirements.

AfterSalesService :

• Galvanized spiral steel pipe