In terms of welding technology, straight seam steel pipes can be divided into resistance welded straight seam steel pipes and submerged arc welding straight seam steel pipes. Resistance welded straight seam steel pipes are further divided into high frequency welded straight seam steel pipes, medium frequency welded straight seam steel pipes, and low frequency welded straight seam steel pipes. The submerged arc welded straight seam steel pipe is also called double-sided submerged arc welded straight seam steel pipe or LSAW straight seam steel pipe, where LSAW is (the abbreviation of Longitudinally Submerged Arc Welding is LSAW). Electric resistance welded straight seam steel pipe is also called ERW straight seam steel […]

Generally, galvanized pipes do not need to be painted. If they are painted, they are usually painted with silver paint. After the steel pipe is galvanized, the surface is covered with a layer of zinc coating, which isolates the steel pipe from the atmosphere, avoids direct contact and corrosion of the steel pipe by the atmosphere, and is protected. As for the zinc coating on the surface of the steel pipe, due to the relatively strong chemical activity of zinc, a thin and dense layer of zinc carbonate will be formed in the air at room temperature to protect the zinc itself from further oxidation. Therefore, galvanized pipes, both the […]

In engineering, industry, chemical industry or home, pipe insulation is the most common way, and the closest thing to life is the insulation of heating pipes. Polyurethane direct-buried insulation pipes are used in thermal and cold insulation projects for various indoor and outdoor pipelines, central heating pipelines, central air-conditioning pipelines, chemical industry, medicine and other industrial pipelineOverview: Since the birth of polyurethane synthetic materials in the 1930s, polyurethane foam insulation pipes have been developing rapidly as an excellent thermal insulation material. Its application range has become more and more extensive, especially because of its simple construction, energy-saving and anti-corrosion effects. It is widely used in various pipelines such as heating, […]

Polyurethane insulation pipe, which is the full name of high-density polyethylene plastic outer protective polyurethane foam prefabricated direct-buried insulation pipe, is formed by connecting the working medium pipeline, polyurethane insulation layer and polyethylene plastic outer protective pipe that transports the medium through the equipment. Forming. Polyurethane insulation pipes are widely used. It has the following advantages: good thermal insulation performance, low heat loss, only 25% of traditional pipes, long-term operation can save a lot of energy, and greatly reduce energy costs; it has strong waterproof, corrosion resistance and high mechanical strength The strength can meet the non-compensated thermal stress requirements of direct burial. With a service life of more than […]