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# Steel Pipes - Heat Loss Diagram

## Heat loss from steel pipes and tubes - dimensions 1/2 to 12 inches.

Heat loss from steel pipes at various temperature difference between pipes and ambient air:

• 1 kW (kJ/s) = 102.0 kpm/s = 859.9 kcal/h = 3,413 Btu/h = 1.360 hk = 1.341 hp = 738 ft lb/s = 1,000 J/s = 3.6x106 J/h
• 1 m (metre) = 3.2808 ft = 39.37 in = 1.0936 yd = 6.214x10-4 mile

For full table - rotate the screen!

Steel Pipes - Heat Loss
Nominal boreHeat loss from Fluid inside Pipe (W/m)
Temperature Difference(oC)
(mm)(inch)506075100110125140150165195225280
15 1/2 30 40 60 90 130 155 180 205 235 280 375 575
20 3/4 35 50 70 110 160 190 220 255 290 370 465 660
25 1 40 60 90 130 200 235 275 305 355 455 565 815
32 1 1/4 50 70 110 160 240 290 330 375 435 555 700 1000
40 1 1/2 55 80 120 180 270 320 375 420 485 625 790 1120
50 2 65 95 150 220 330 395 465 520 600 770 975 1390
65 2 1/2 80 120 170 260 390 465 540 615 715 910 1150 1650
80 3 100 140 210 300 470 560 650 740 860 1090 1380 1980
100 4 120 170 260 380 585 700 820 925 1065 1370 1740 2520
150 6 170 250 370 540 815 970 1130 1290 1470 1910 2430 3500
200 8 220 320 470 690 1040 1240 1440 1650 1900 2440 3100 4430
250 10 270 390 570 835 1250 1510 1750 1995 2300 2980 3780 5600
300 12 315 460 670 980 1470 1760 2060 2340 2690 3370 4430 6450

Heat loss should be corrected for certain applications:

Steel Pipes - Heat Loss Correction Factor
ApplicationCorrection factor
Single pipe freely exposed 1.1
More than one pipe freely exposed 1.0
More than one pipe along the ceiling 0.65
Single pipe along skirting or riser 1.0
More than one pipe along skirting or riser 0.90
Single pipe along ceiling 0.75

## 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.
• ### Piping Systems

Calculate dimensions of pipes and tubes. Pressure drop calculations and head loss charts. Use of different piping materials. Insulation of pipes and tubes and heat loss diagrams.

## Related Documents

• ### ANSI Schedule 80 Steel Pipes - Dimensions

Internal and external diameters, areas, weights, volumes and number of threads for schedule 80 steel pipes.
• ### Conductive Heat Transfer

Conductive heat transfer takes place in a solid if there is a temperature gradient.
• ### Copper Tubes - Heat Losses

Heat loss from uninsulated copper tubes vs. temperature differences between tube and air.
• ### Copper Tubes - Uninsulated Heat Losses

Heat loss from uninsulated copper pipes - dimensions ranging 1/2 - 4 inches.
• ### EN 10241 - Steel Threaded Pipe Fittings

EN 10241 specifies requirements for screw threaded fittings.
• ### EN 10255 - Non-alloy Steel Tubes for Welding and Threading - Dimensions

Dimensions and weights of steel tubes according BS EN 10255.
• ### EN 10312 - Welded Stainless Steel Tubes for the Conveyance of Aqueous Liquids Including Water for Human Consumption - Dimensions

Dimensions of welded stainless steel tubes according EN 10312.
• ### Pipes - Insulated Heat Loss Diagrams

Heat loss (W/m) from 1/2 to 6 inches insulated pipesĀ - ranging insulation thickness 10 to 80 mm and temperature differences 20 to 180 degC.
• ### Pipes - Insulated Heat Loss Diagrams

Heat loss (W/ft) diagrams for 1/2 to 6 inches insulated pipesĀ - ranging insulation thickness 0.5 to 4 inches and temperature differences 50 to 350 degF.
• ### 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.
• ### Polyurethane Insulation

Thermal conductivity - k-values - vs. temperature.
• ### 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.
• ### Steel Pipes - Bundling Schedules Length and Weight

Bundling schedules for standard weight and extra strong steel pipes.
• ### Steel Pipes - Heat Loss Diagram

Heat loss from steel pipes and tubes - dimensions 1/2 to 12 inches.
• ### Steel Pipes - Heat Loss Diagram

Heat loss from steel pipes and tubes - dimensions 1/2 to 12 inches.

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## Citation

• The Engineering ToolBox (2003). Steel Pipes - Heat Loss Diagram. [online] Available at: https://www.engineeringtoolbox.com/steel-pipes-heat-loss-d_53.html [Accessed Day Month Year].

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5.16.12

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