Pressure Rating of Boiler Tubes and Their Applications

Pressure Rating Classification of Boiler Tubes

The pressure rating of boiler tube refers to the maximum working pressure that the pipe can withstand. According to international standards, the pressure rating of boiler tubes is usually categorized into three grades: low-pressure boiler tubes, medium-pressure boiler tubes and high-pressure boiler tubes.

1. Low-pressure boiler tubes: Low-pressure boiler tubes are suitable for boilers with working pressures not exceeding 2.5MPa (megapascals). Commonly used pressure levels of low-pressure boiler tubes are: 0.8MPa, 1.0MPa, 1.25MPa, and 1.6MPa. 

2. Medium-pressure boiler tubes: Medium-pressure boiler tubes are suitable for boilers with working pressures between 2.5MPa and 9.8MPa. Common medium-pressure boiler tube pressure levels are: 2.5MPa, 4.0MPa, 6.4MPa, 9.8MPa.

3. High-pressure boiler tubes: High-pressure boiler tubes are suitable for boilers with working pressures greater than 9.8MPa. Common pressure grades of high-pressure boiler tubes are: 13.7MPa, 15.9MPa, 20.0MPa, 24.0MPa, 32.0MPa.

Application of Boiler Tubes of Different Pressures

1. Low-pressure boiler tube: Low-pressure boiler tube is suitable for some special occasions, such as hot water supply systems in hospitals, schools, hotels, etc. The pressure level of low-pressure boiler tube is low, but it can meet the needs of these occasions.

2. Medium-pressure boiler pipe: Medium-pressure boiler pipe is suitable for boiler systems in general industrial and civil buildings, such as hot water boilers, steam boilers, etc. Medium-pressure boiler tubes have moderate pressure levels, relatively low prices, and can meet general production and living needs.

3. High-pressure boiler tubes: High-pressure boiler tubes are widely used in chemical, electric power, petroleum and other industries, because the production processes in these industries require high-temperature and high-pressure steam. High-pressure boiler tubes can withstand such high-temperature and high-pressure environments to ensure the normal production process.

Summarize

The selection of boiler tube pressure level should be determined according to the actual working pressure to ensure the safe and stable operation of the pipeline. When using boiler tubes, they must be installed, used and maintained strictly in accordance with the pressure level requirements to ensure the safety and reliability of the boiler tubes.

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