Pipes - Insulated Heat Loss Diagrams
Heat loss (W/ft) diagrams for 1/2 to 6 inches insulated pipes - ranging insulation thickness 0.5 to 4 inches and temperature differences 50 to 350 oF.
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The heat loss diagrams below is based on metal pipes with fiber glass insulation, thermal conductivity 0.25 Btu/h oF ft2/in and outdoor condition with moderate wind 20 mph. A safety factor of 10% is included.
- indoor location - reduce values with 10%
- mineral wool insulation - increase values with 6%
- rigid cellular polyurethane - reduce values by 30%
- Heat loss diagram (W/ft)
Pipe Heat Loss - Insulation thickness 4 inches
- 1 W/ft = 3.41 Btu/h ft = 3.28 W/m
- 1 oF = 0.555 oC
Pipe Heat Loss - Insulation thickness 3 inches
Pipe Heat Loss - Insulation thickness 2.5 inches
Pipe Heat Loss - Insulation thickness 2 inches
Pipe Heat Loss - Insulation thickness 1.5 inches
Pipe Heat Loss - Insulation thickness 1 inch
Pipe Heat Loss - Insulation thickness 0.5 inches
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