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Basic knowledge of boiler tubes

Refers to the boiler tube open at both ends and has a hollow section, the length of the periphery of the large steel, according to the production method can be divided into seamless and welded steel pipe, steel pipe size specifications (such as diameter or length) and wall thickness, the size of a wide range of large caliber pipe from small diameter the capillary diameter up to several meters until. Steel pipe can be used in pipe, thermal equipment, mechanical industry, petroleum geological exploration, container, chemical industry and special purpose.

Classification of boiler tubes

The steel pipe seamless steel pipe and welded steel pipe (seamed pipe) two categories. According to section shape and can be divided into round tube shaped tube, round steel pipe is widely used, but there are also some square, rectangular, semicircular, hexagonal, triangular, octagonal shaped steel tube. For the steel to withstand the pressure to the hydraulic test to test its ability and quality, leakage, soaked or expansion for qualified does not occur at the prescribed pressure, some steel according to the requirement of standard or edge test, flaring test and flattening test.

Manufacturing method

The average temperature in the boiler tube below 350 DEG C, domestic tube is mainly used for No. 10 and No. 20 carbon steel hot rolled or cold drawn pipe tube manufacturing.

High pressure boiler tubes are often used in high temperature and high pressure conditions, the pipe in the high temperature flue gas and water vapor

With the next, will be the occurrence of oxidation and corrosion. The steel pipe has high strength, high corrosion resistance and good stability.


Boiler tubes are mainly used in the manufacture of water wall tubes, boiling water pipes, superheated steam pipe, locomotive boiler used in the superheated steam pipe, large, small smoke pipe and arch brick tube, etc..

The high pressure boiler tube is mainly used to manufacture high-pressure and ultrahigh pressure boiler superheater, reheater pipe, main steam pipe etc.. High pressure boiler tube industry supply and demand trend is generally stable, however, the supply and demand situation of various sub sectors will be further differentiated. Industry pointed out that the most critical aspect is the use and promotion of new energy-saving insulation 20g high pressure boiler tube equipment.

The new energy-saving 20g high pressure boiler tube products is gradually increasing in the market, for example, green paint, energy saving and environmental protection, environmental protection and sanitary products, stone cement foam insulation board, energy saving and environmental protection products industry broad market prospect is good to see in the 20g high pressure boiler.

Relevant provisions on boiler tubes

(1) GB/T5310-2008 "seamless steel tubes for high pressure boilers". Chemical composition test method according to GB222-84 and "iron and steel and alloy chemical analysis method", GB223 "iron and steel and alloy chemical analysis method" in the relevant part.


(2) the test of chemical composition of the steel pipe of the imported boiler is carried out according to the relevant standards stipulated in the contract.

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