20# Heavy-Walled Steel Pipe, 45# Heavy-Walled Steel Pipe, 16Mn Heavy-Walled Steel Pipe

What is a thick-walled steel pipe? It is a type of boiler pipe, belonging to the seamless steel pipe category. The manufacturing method is the same as that of seamless steel pipes, but there are certain strict requirements for the steel grades used in the manufacturing process. As thick-walled steel pipes are often subjected to high temperatures and pressures during use, they are primarily used to manufacture overheat pipes, reheater pipes, steam guiding pipes, and seamless main steam pipes for high-pressure and ultra-high-pressure boilers.

The production methods of thick-walled steel pipes are categorized based on the varying service temperatures, distinguishing between general boiler pipes and high-pressure boiler pipes. Thick-walled steel pipes with service temperatures below 450℃ are primarily manufactured in China using hot-rolled or cold-drawn pipes made from 10# or 20# carbon structural steel. These pipes are often used under high-temperature and high-pressure conditions. Under the influence of high-temperature flue gas and steam, the pipes can experience oxidation and corrosion. It is required that the steel pipes possess high tensile strength, excellent resistance to oxidation and corrosion, as well as good structural stability.

Thick-walled steel pipes are widely used, primarily for manufacturing water-cooled wall pipes, boiler pipes, superheated steam pipes for locomotive boilers, large and small flue pipes, and arch brick pipes, among others. They are also utilized in the production of superheater pipes, reheater pipes, ducting pipes, and main steam pipes for power plants manufacturing high-pressure and ultra-high-pressure boilers.