Boiler tube size chart

Boiler tubes come in a variety of sizes, depending on the application and pressure requirements. The size of the tubes is generally defined by their outer diameter (OD) and wall thickness (WT). Below is a general chart listing typical boiler tube sizes:

Notes:

Outer Diameter (OD): This is the external diameter of the tube.

Wall Thickness (WT): The thickness of the tube wall, which determines its ability to handle pressure.

Common Standards: Boiler tubes adhere to international standards like ASTM (American Society for Testing and Materials), ASME (American Society of Mechanical Engineers), which ensure their quality and performance under specific conditions.

Application of Sizes

Smaller diameters (12.7 mm - 25.4 mm OD) are typically used for low-pressure steam boilers, heat exchangers, and economizers.

Medium diameters (31.75 mm - 50.8 mm OD) are used in medium-pressure and high-pressure boilers, as well as superheaters.

Larger diameters (63.5 mm - 127 mm OD) are often used in large industrial boilers, power plants, and high-pressure steam pipelines.

The actual size and material selection will depend on the specific requirements of the boiler system, including its pressure and temperature ratings.