Common boiler tube sizes and uses

Sizes and Applications of Common Boiler Tubes

Boiler tubes are critical components in systems that convert water into steam or hot water, playing a vital role across various industrial processes. Commonly used boiler tube dimensions include Φ25×2.5 mm, Φ32×3.5 mm, Φ38×3.5 mm, and Φ42×3.5 mm. Depending on operational requirements and manufacturing processes, these tubes are produced from different materials such as carbon steel, stainless steel, and alloy steel.

Each size serves specific applications—Φ25×2.5 mm tubes are typically used in compact boiler systems where high thermal efficiency is needed, while Φ42×3.5 mm tubes are better suited for large-scale boilers in thermal power plants due to their ease of installation and handling under higher load conditions.

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Sizes and Applications of High-Temperature, High-Pressure Boiler Tubes

High-temperature and high-pressure boiler tubes are engineered for use in environments with more demanding operating conditions than standard boilers. These tubes are manufactured to stricter specifications in terms of material strength, dimensional tolerance, and production process to withstand elevated pressures and temperatures.

Common sizes include Φ51×5.5 mm, Φ89×6 mm, and Φ108×8 mm. They undergo rigorous heat treatment and quality testing to ensure durability and safety under extreme working environments. These tubes are widely applied in power generation, petrochemical plants, metallurgy, and other industries where thermal efficiency and mechanical reliability are critical.

Sizes and Applications of Boiler-Specific Seamless Tubes

Boiler-specific tubes—often seamless steel tubes—are essential to the construction and maintenance of modern boiler systems. Their specifications are determined by the boiler type, operating pressure, temperature range, and the nature of the working medium.

Common sizes include Φ73×5 mm, Φ89×6 mm, and Φ102×8 mm. These tubes are designed to endure high-temperature, high-pressure conditions while offering excellent corrosion resistance and mechanical strength. Widely used across power generation, chemical processing, and petroleum industries, boiler-specific tubes are indispensable in both boiler manufacturing and system upgrades or repairs.

Carbon Steel Boiler And Heat Exchanger Tube

Alloy Steel Boiler And Heat Exchanger Tube

Summary

Boiler tubes—classified as either medium-pressure or high-pressure—are predominantly made from carbon steel or alloy steel. They are integral to steam generation systems found in power stations, fossil fuel plants, and a wide range of industrial applications. The selection of tube size and material must align with the boiler’s design specifications and operational demands to ensure optimal performance and safety.