Internal and external epoxy coated composite steel pipes are steel pipes that are coated with epoxy resin powder by hot melt bonding on the surface of the inner and outer walls, forming a corrosion-resistant and anti-corrosion ... [阅读全文]

Large diameter spiral steel pipes are mainly used for the transportation of drinking water in underground pipelines, the transportation of recycled water, the discharge of sewage, and the discharge of rainwater. The spiral steel ... [阅读全文]

Spiral welded pipe belongs to the category of welded steel pipes, named after the presence of a spiral shaped weld on both sides. The superior structural characteristics of double-sided submerged arc spiral welded steel pipes de... [阅读全文]

Before processing the outer polyethylene inner epoxy coated steel pipe, the base material steel pipe must be re inspected upon arrival at the factory, and the appearance and geometric dimensions of the steel pipe must be tested... [阅读全文]

Steel jacketed steel buried steam pipeline is a new type of insulation pipeline, which adopts the structure of steel jacketed steel. The outer steel pipe is used to protect the insulation layer, and the inner working steel pip... [阅读全文]

The double-sided submerged arc welding spiral steel pipe adopts the welding process of submerged arc automatic welding machine, and the steel pipe produced has a high qualification rate; The production unit proceeds in an orderly... [阅读全文]

The production process of water supply coated composite steel pipes usually includes the following steps: 1. Preparation of coated steel pipes: Select high-quality spiral seam welded steel pipes as the substrate, commonly used ste... [阅读全文]

The measurement of the percentage of voids and bubbles on the insulation layer section of polyurethane insulation pipe shall be carried out in accordance with the Standard of High Density Polyethylene External Protection Pipe Pol... [阅读全文]

The inner EP outer PE coated steel pipe has excellent corrosion resistance, which can effectively block the erosion of chemical substances on the pipe, ensuring the purity and quality of the conveying medium. Secondly, the inner... [阅读全文]

The quality of spiral steel pipes is determined by the quality of the weld seam. Once pores are formed in the weld seam of spiral steel pipes, it not only affects the density of the weld seam, causing pipeline leakage, but also becomes a trigger point for corrosion, seriously reducing the strength and toughness of the weld seam. [阅读全文]