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03-25 

Production process of welded steel pipe

The development of steel pipe production technology began with the rise of the bicycle manufacturing industry, the development of oil in the early 19th century, the manufacture of ships, boilers, and aircraft during the two world wars, the manufacture of thermal power boilers after the Second World War, the development of the chemical industry, and The drilling, production and transportation of oil and natural gas have effectively promoted the development of variety, output and quality of the steel pipe industry.

08-29 

Brief Introduction of Polyurethane Direct Buried Insulation Pipe

Polyurethane direct buried insulation pipe is a kind of direct buried prefabricated insulation pipe with good insulation performance, safety and reliability, and low engineering cost. Directly buried insulation pipe not only has advanced technology and practical performance that traditional trenches and overhead laying pipelines are incomparable, but also has significant social and economic benefits. It is also a powerful measure for heating and energy saving. The prefabricated direct buried insulation pipe adopts direct buried heating pipeline technology, which indicates that the development of China's heating pipeline technology has entered a new starting point. With the declining world energy and increasing demand, energy conservation, emission reduction, and environmental protection have become global development trends. National and local governments have also vigorously advocated the development, application, and industrialization of energy conservation, emission reduction, and environmental protection products.

08-29 

The use of 3PE polyethylene anticorrosive insulation pipe

At present, pipeline anti-corrosion technology has been widely praised in the actual application in the market. Pipeline anti-corrosion technology has been used in industrial equipment such as construction, petroleum, power, metallurgy, national defense, transportation storage, boilers, heat exchangers, fans, vehicles and ships. Among them, the anti-corrosion insulation pipe technology is usually to add anti-corrosion coating on the outer wall of the spiral pipe to reduce corrosion and achieve extended life. At present, the main external anti-corrosion coatings for spiral pipeline anti-corrosion are three-layer PE polyethylene, epoxy resin powder, epoxy coal pitch and so on. It can produce epoxy powder anticorrosive insulation pipe, epoxy coal asphalt anticorrosion steel pipe, etc.

08-29 

Recognize the role of insulated steel pipes

The production process of steel jacket steel steam insulation steel pipe is very high-end. After casting, the whole shape is not only able to have better integrity, but also has a beautiful effect. It can be used in various environments and can be adapted to various specifications and models. Match, so whether it is industrial production or living, it is still in ordinary family life.

04-17 

Spiral steel pipe classification

Conveying fluid under pressure, using spiral seam submerged arc welded steel pipe SY5036-2000, mainly used to transport oil and natural gas pipelines;

04-17 

How to maintain and strengthen the stability of spiral steel pipe

04-07 

Production process of epoxy resin anticorrosive steel pipe

Epoxy resin anti-corrosion steel pipe

08-10 

Causes and solutions of common defects in spiral steel pipe welds

The main causes of the common defects of spiral steel pipe welds are the following, let us understand what are the countermeasures!

06-28 

Trump's latest decision may ease the trade dispute with China

The "Business Insider" website reported on June 27 that US President Trump announced on Wednesday the details of the plan to restrict Chinese investment in US technology companies, including expanding the authority of the US Foreign Investment Commission (CFIUS), which is more than previously expected The measures are much milder. The report said that the specific contents of the Foreign Investment Risk Review Modernization Act (FIRRMA) of the Senate and the House of Representatives still need to be finally coordinated, but both versions will strengthen CFIUS's review authority for foreign investment in key technologies. In addition, the senator ’s version of FIRRMA includes a stricter review process for investments from countries such as China, South Korea, Iran, Russia, and Venezuela.

05-11 

National standard large-caliber spiral steel tube craze

Large-diameter spiral steel pipe refers to spiral steel pipe with a caliber above DN850. The main raw material for production is strip steel. The strength of spiral steel pipes is generally higher than that of straight-seam welded pipes. It is possible to produce welded pipes with larger diameters from narrow blanks, and to produce welded pipes with different diameters from blanks of the same width. The large-scale spiral steel pipe adopts double-sided submerged arc welding technology. Submerged arc welding has the advantages of stable welding quality, high welding productivity, no arc light and little smoke and so on. The main parameters are outer diameter, wall thickness and length. The main mechanics tests are water pressure, bending, and flattening.