1. What is a boiler tube?
Boiler tube refers to a steel with open ends and a hollow section, and its length is larger than that of the periphery. According to the production method, it can be divided into seamless steel pipe and welded steel pipe. Wall thickness means a wide range of dimensions, from capillary tubes with a small diameter to large-diameter tubes with a diameter of several meters. Steel pipes can be used for pipelines, thermal equipment, machinery industry, petroleum geological exploration, containers, chemical industry and special purposes.
2. Classification
Boiler tubes are divided into general boiler tubes and high-pressure boiler tubes according to the high temperature performance they bear, and can be divided into various steel tubes according to their different requirements.
3. Purpose of boiler tube
①General boiler tubes are mainly used to make water wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes and arched brick tubes.
②High-pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, air guide tubes, main steam tubes, etc. of high-pressure and ultra-high-pressure boilers.
4. Use steel grade
(1) High-quality carbon structural steel is GB 5310 20G High Pressure Boiler Tube , GB 5310 20MNG High Pressure Seamless Boiler Tubes, GB 5310 25MNG High Pressure Seamless Boiler Tubes, etc.
(2) The alloy structural steel is 15CrMo Seamless Alloy Steel Pipe/Tube, 12Cr1MoV High Pressure Seamless Alloy Steel Boiler Tube , Din 17175 16Mo3 Seamless High Pressure Alloy Steel Boiler Tube , etc.
(3) In addition to ensuring chemical composition and mechanical properties, 1Cr18Ni9 and 1Cr18Ni11Nb boiler tubes commonly used in rusty and heat-resistant steel must be subjected to hydrostatic tests, as well as flaring and flattening tests. The steel pipe is delivered in a heat-treated state. In addition, there are also certain requirements for the microstructure, grain size, and decarburized layer of the finished steel pipe.
Post time: Feb-22-2024