The boiler tube is a seamless pipe. The manufacturing method is the same as that of seamless pipes, but there are strict requirements on the steel types used in the manufacture of steel pipes. According to the operating temperature, it can be divided into general boiler tubes and high-pressure boiler tubes.
The mechanical properties of steel are important indicators to ensure the end-use performance (mechanical properties) of steel. It depends on the chemical composition and heat treatment of the steel. In steel pipe standards, tensile properties (tensile strength, yield strength or yield point, elongation), hardness and toughness indicators, and required high and low temperature properties are specified according to different use requirements.
Differences in manufacturing methods:
① The operating temperature of general boiler tubes is below 450°C, and domestic pipes mainly use No. 10 and No. 20 carbon (C) bonded steel heat pipes or cold-drawn pipes.
②High pressure boiler tubes are often used under high temperature and high pressure conditions. Under the action of high-temperature flue gas and water vapor (referred to as water vapor), the pipe will be oxidized and corroded. Steel pipes are required to have high durable strength, high oxidation and corrosion resistance, and good structural stability.
Use the difference:
① General boiler tubes are mainly used to manufacture water wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes, arch brick tubes, etc. The substrate of the large-diameter thick-walled steel pipe undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a dense structure. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate. Therefore, it has strong corrosion resistance.
②High-pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, air tubes, main steam tubes, etc. High and ultra-high pressure boilers. Boiler steel pipe manufacturers are flat steel products made by pouring molten steel, cooling and pressing. It is flat and rectangular and can be rolled or cut directly from wide steel strips. According to rolling, it is divided into hot rolling and cold rolling.
The mechanical properties of steel are important indicators to ensure the end-use performance (mechanical properties) of steel. It depends on the chemical composition and heat treatment of the steel. In steel pipe standards, tensile properties (tensile strength, yield strength or yield point, elongation), hardness and toughness indicators, and required high and low temperature properties are specified according to different use requirements.
Differences in manufacturing methods:
① The operating temperature of general boiler tubes is below 450°C, and domestic pipes mainly use No. 10 and No. 20 carbon (C) bonded steel heat pipes or cold-drawn pipes.
②High pressure boiler tubes are often used under high temperature and high pressure conditions. Under the action of high-temperature flue gas and water vapor (referred to as water vapor), the pipe will be oxidized and corroded. Steel pipes are required to have high durable strength, high oxidation and corrosion resistance, and good structural stability.
Use the difference:
① General boiler tubes are mainly used to manufacture water wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes, arch brick tubes, etc. The substrate of the large-diameter thick-walled steel pipe undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a dense structure. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate. Therefore, it has strong corrosion resistance.
②High-pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, air tubes, main steam tubes, etc. High and ultra-high pressure boilers. Boiler steel pipe manufacturers are flat steel products made by pouring molten steel, cooling and pressing. It is flat and rectangular and can be rolled or cut directly from wide steel strips. According to rolling, it is divided into hot rolling and cold rolling.
