Types of structural steel pipe

Many variable factors said erosion medium characteristics, the chemical product and its concentration, atmospheric conditions, temperature, time, so if do not understand the nature of the medium accurately, it is difficult to use of materials, select materials. However, the following can be used as a selection guidelines of structural steel pipe:

The type 304 throughout the use of materials. Of corrosion in the building can withstand, can resist food processing medium erosion (but with concentrated acid and chloride composition state of high temperature erosion may occur), can resist organic compounds, dyes, and in all kinds of inorganic compounds.

304 l (low carbon), nitric acid resistance is good, and durable medium temperature and the concentration of sulfuric acid, throughout the land used for liquid gas storage tank, instruments used for cryogenic equipment (304 n), the rest of the consumer products, kitchen equipment, hospital equipment, transportation, handling device wastewater.

Type 316 a little more than 304 type contains nickel, and molybdenum containing 2% ─ 3%, the corrosion resistance is better than 304 type, special is in tend to cause some erosion of chloride medium. Type 316 has been used as a sulfite pulp machine, because it is durable sulphate. And, its use has to deal with a lot of chemical products in the processing industry.

Type 317 containing 3% - 4% of molybdenum (in this series is of high level), and contains more than 316 type of chrome, has higher resistance to erosion and the erosion of the aperture function.

Type 430-430 type alloy content is low, as in a warm atmosphere high polishing decoration purposes, also used for nitric acid and food processing equipment.

Type 410 has the lowest in the three kinds of general purpose stainless steel alloy content, need strength and corrosion resistance with Gao Cheng force components used, such as strong. Type 410 in warm atmosphere, hydrosphere and many moderate chemical corrosion product of medium.

2205 type 304 type and 2205 type is advantageous, because the structure of the tube he to have high resist chloride stress corrosion crack force.

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