Before forming the double-sided submerged arc welded spiral welded steel pipe, the strip steel was straightened, cut, scraped, surface cleaned, transported, and bent. The use of an electric contact pressure gauge controls the pres... [阅读全文]

Epoxy resin powder coated steel pipes have excellent corrosion resistance. Due to its surface being coated with epoxy resin, it can effectively isolate the direct contact between the steel pipe and the external environment, avoid... [阅读全文]

During the forming process of submerged arc welded spiral steel pipes for drainage, the deformation of the steel plate is uniform, the residual stress is small, and the surface does not produce scratches. The processed submerged... [阅读全文]

There is a 20mm thick air layer in the steel sleeve buried steam insulation pipeline, which is filled with air and contains a large amount of water vapor. These water vapors will corrode the pipeline on one hand, and on the... [阅读全文]

The spiral seam welded steel pipe with inner and outer plastic coating is a form of anti-corrosion treatment for the inner and outer walls of the steel pipe, which effectively avoids corrosion of the steel pipe by the conveyi... [阅读全文]

After repairing the spiral seam welded steel pipe, it undergoes non-destructive testing again until it is confirmed that the defect no longer exists, and is rated as qualified. The pipes where the steel strip butt weld and the... [阅读全文]

The anti-corrosion steel pipe coated with epoxy resin inside and outside is a steel plastic composite pipe made from spiral steel pipe or seamless steel pipe as the substrate, using sandblasting chemical dual pre-treatment, prehe... [阅读全文]

Spiral seam steel pipes generally have higher strength than straight seam welded pipes, and can produce welded pipes with larger diameters using narrower billets. They can also produce welded pipes with different diameters using ... [阅读全文]

The executive standard of polyurethane prefabricated directly buried thermal insulation pipe is GB/T29047-2012 national standard for high-density polyethylene outer protective pipe, rigid polyurethane foam plastic prefabricated directly... [阅读全文]

The external anti-corrosion coating of the outer PE inner EP coated steel pipe for drinking water transportation is a single-layer polyethylene coating with external hot melt bonding, and the inner layer is a fusion bonded epoxy... [阅读全文]