Correctly choosing the steel is very important to the gas fired steam boiler

Date: 06-23-2014 Author: ailsa from ZG boiler

Compared with the ordinary pressure vessel, boiler pressure parts of the gas steam boiler are often designed with a lot of pipe hole and connected with the complex pipeline system in addition to bear the pressure, it will collide by the radiation and erosion of high temperature flue gas, the high wall temperature , the complex stress state and other poor working conditions. Boiler pressure parts in the work once fail, it will cause the extremely serious consequence. therefore, the pressure parts of the material must have a sufficiently high strength,plasticity, toughness and fatigue resistance and corrosion resistance property. High temperature components must have high temperature mechanical properties.

In addition, in the manufacturing process of the compression element, the raw material will be processed with complex deformation and welding. And the steel used to manufacture the boiler must have good quality. All the material used to produce pressure components must comply with the relevant national standards. The flaws of Hierarchical layer, non metallic inclusion in steel, porosity should be as few as possible. white spots and crack are no tallowed to exist.

according to the working conditions of the boiler, the steel gas steam boiler pressure parts is divided into two categories, the room temperature to the temperature (creep temperature below) steel and high temperature components used in steel. For the steel used in temperature below pressure components, mainly steel plate and section steel. The boiler plate is mainly used in the manufacture of shell, shell, tube sheet, head, tube is mainly used in the manufacture of evaporation and economizer and some not heating pipe. For high temperature components of steel, mainly steel, used in the manufacture of superheater, superheater pipe and collection box.

Keyword: Industry steam boiler,gas fired steam boiler,boiler steel

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