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# Pipes - Bare Surface Heat Loss

## Heat loss vs. surface temperature.

The diagrams below indicates heat loss from uninsulated pipes with bare surfaces at still-air conditions and air temperature 70 oF (21 oC). The emissivity coefficient of the surface is 0.95.

## Related Topics

• ### Heat Loss and Insulation

Heat loss from pipes, tubes and tanks - with and without insulation. Use of materials lke foam, fiberglass, rockwool and more.
• ### Insulation

Calculate heat transfer and heat loss from buildings and technical applications. Heat transfer coefficients and insulation methods available for reduction of energy consumption.
• ### Insulation and Heat Loss from Steam and Condesate Pipe Lines

Heat loss from uninsulated and insulated steam and condensate pipes and tanks. Calculate insulation thicknesses.

## Related Documents

• ### Building Materials - Radiation Constants

The radiation constant is the product between the Stefan-Boltzmann constant and the emissivity constant for a material.
• ### Copper Tubes - Heat Losses

Heat loss from uninsulated copper tubes vs. temperature differences between tube and air.
• ### Oil Filled Tanks - Heat Loss

Heat loss from insulated and uninsulated, sheltered and exposed heated oil tanks.
• ### Pipes and Cylinders - Conductive Heat Losses

Conductive heat losses through cylinder or pipe walls.
• ### Pipes Submerged in Oil or Fat - Heat Emission

Heat emission from steam or water heating pipes submerged in oil or fat - forced and natural circulation.
• ### Pipes Submerged in Water - Heat Emission

Heat emision from steam or water heating pipes submerged in water - assisted (forced) or natural circulation.
• ### Radiation - Surface Emissivity Coefficients

Radiation emissivity of common materials like water, ice, snow, grass and more.

Heat transfer due to emission of electromagnetic waves is known as thermal radiation.
• ### Steam Pipes - Heat Losses

The amount of condensate generated in a steam pipe depends on the heat loss from the pipe to the surroundings.
• ### Steam Pipes - Heat Losses (W/m)

Heat losses from un-insulated steam pipes.
• ### Steam Tracing Pipe Lines

Steam tracing of pipe lines can be done to maintain appropriate product temperatures.
• ### Surface Emissivity Coefficients

The radiation heat transfer emissivity coefficients for some common materials like aluminum, brass, glass and many more.

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## Citation

• The Engineering ToolBox (2008). Pipes - Bare Surface Heat Loss . [online] Available at: https://www.engineeringtoolbox.com/heat-loss-bare-surface-d_1153.html [Accessed Day Month Year].

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8.21.8

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