Boiler tube is a kind of seamless tube. The manufacturing method is the same as seamless pipe, but there are strict requirements on the type of steel used to manufacture steel pipe. According to the use of temperature is divided into two kinds of general boiler tube and high-pressure boiler tube.

The mechanical property of boiler tube is an important index to ensure the final serviceability of steel. It depends on the chemical composition of steel and the heat treatment system. In the steel pipe standard, according to different use requirements, stipulated the tensile properties (tensile strength, yield strength or yield point, elongation) and hardness, toughness indicators, as well as user requirements of high and low temperature performance.

① The general boiler tube temperature is below 350℃, domestic pipe is mainly made of No. 10, no. 20 carbon steel hot rolled pipe or cold drawn pipe.

Boiler tube

Boiler tube

(2) High-pressure boiler tubes are often used under high temperature and high pressure conditions. Under the action of high temperature flue gas and water vapor, oxidation and corrosion will occur. The steel pipe is required to have high durable strength, high oxidation corrosion resistance and good microstructure stability.