Related Resources: heat transfer
Heat Loss from Pipe Outdoors
Heat Loss from Piping Chart For Piping Intended to Be Installed Outdoors
Heat Loss from Piping
Insulation Type | Insulation Factor | Heat Loss per Inch Thickness Based on K Factor @ 50°F Mean Temp. (Btu/h • °F • ft2) |
Glass fiber (ASTM C547) | 1.00 | 0.25 |
Calcium silicate (ASTM C533) | 1.50 | 0.375 |
Cellular glass (ASTM C552) | 1.60 | 0.40 |
Rigid cellular urethane (ASTM C591) | 0.66 | 0.165 |
Foamed elastomer (ASTM C534) | 1.16 | 0.29 |
Mineral fiber blanket (ASTM C553) | 1.20 | 0.30 |
Expanded perlite (ASTM C610) | 1.50 | 0.375 |
Insulation Thickness (in.) |
∆T, °F |
IPS |
||||||||||||
½ | ¾ | 1 | 1¼ | 1½ | 2 | 2½ | 3 | 4 | 6 | 8 | 10 | 12 | ||
Tubing Size (in.) |
||||||||||||||
¾ | 1 | 1¼ | 1½ | |||||||||||
0.5 |
10 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 1.1 | 1.3 | 1.5 | 1.8 | 2.6 | 3.3 | 4.1 | 4.8 |
50 | 2.5 | 2.9 | 3.5 | 4.1 | 4.8 | 5.5 | 6.5 | 7.7 | 9.6 | 13.5 | 17.2 | 21.1 | 24.8 | |
100 | 5.2 | 6.1 | 7.2 | 8.6 | 9.9 | 11.5 | 13.5 | 15.9 | 19.9 | 28.1 | 35.8 | 43.8 | 51.6 | |
150 | 8.1 | 9.5 | 11.2 | 13.4 | 15.5 | 17.9 | 21.0 | 24.8 | 31.9 | 43.8 | 55.7 | 68.2 | 80.2 | |
200 | 11.2 | 13.1 | 15.5 | 18.5 | 21.4 | 24.7 | 29.0 | 34.3 | 42.7 | 60.4 | 76.9 | 94.1 | 110.7 | |
250 | 14.6 | 17.1 | 20.2 | 24.1 | 27.9 | 32.2 | 37.8 | 44.7 | 55.7 | 78.8 | 100.3 | 122.6 | 144.2 | |
1.0 |
10 | 0.3 | 0.4 | 0.4 | 0.5 | 0.6 | 0.6 | 0.7 | 0.8 | 1.0 | 1.4 | 1.8 | 2.2 | 2.6 |
50 | 1.6 | 1.9 | 2.2 | 2.5 | 2.9 | 3.2 | 3.7 | 4.4 | 5.4 | 7.4 | 9.4 | 11.4 | 13.4 | |
100 | 3.4 | 3.9 | 4.5 | 5.2 | 5.9 | 6.8 | 7.8 | 9.1 | 11.2 | 15.5 | 19.5 | 23.8 | 27.8 | |
150 | 5.3 | 6.1 | 7.0 | 8.2 | 9.3 | 10.5 | 12.2 | 14.2 | 17.4 | 24.1 | 30.4 | 37.0 | 43.3 | |
200 | 7.4 | 8.4 | 9.7 | 11.3 | 12.8 | 14.6 | 16.8 | 19.6 | 24.0 | 33.4 | 42.0 | 51.2 | 59.9 | |
250 | 9.6 | 11.0 | 12.6 | 14.8 | 16.7 | 19.0 | 22.0 | 25.6 | 31.4 | 43.6 | 54.9 | 66.9 | 78.2 | |
1.5 |
10 | 0.3 | 0.3 | 0.3 | 0.4 | 0.4 | 0.5 | 0.5 | 0.6 | 0.8 | 1.0 | 1.3 | 1.4 | 1.8 |
50 | 1.3 | 1.5 | 1.7 | 1.9 | 2.2 | 2.4 | 2.8 | 3.2 | 3.9 | 5.3 | 6.6 | 8.0 | 9.3 | |
100 | 2.7 | 3.1 | 3.5 | 4.0 | 4.5 | 5.1 | 5.8 | 6.7 | 8.1 | 11.1 | 13.8 | 16.7 | 19.5 | |
150 | 4.3 | 4.8 | 5.5 | 6.3 | 7.1 | 7.9 | 9.1 | 10.4 | 12.6 | 17.2 | 21.5 | 26.0 | 30.3 | |
200 | 5.9 | 6.7 | 7.6 | 8.7 | 9.8 | 11.0 | 12.5 | 14.5 | 17.5 | 23.8 | 29.7 | 36.0 | 41.9 | |
250 | 7.8 | 8.7 | 9.9 | 11.4 | 12.8 | 14.4 | 16.4 | 18.9 | 22.8 | 31.1 | 38.9 | 47.1 | 54.8 | |
2.0 |
10 | 0.2 | 0.2 | 0.3 | 0.3 | 0.4 | 0.4 | 0.4 | 0.5 | 0.6 | 0.8 | 1.0 | 1.2 | 1.4 |
50 | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 2.0 | 2.3 | 2.6 | 3.1 | 4.2 | 5.2 | 6.3 | 7.3 | |
100 | 2.4 | 2.7 | 3.0 | 3.4 | 3.8 | 4.2 | 4.8 | 5.5 | 6.5 | 8.8 | 10.9 | 13.1 | 15.2 | |
150 | 3.7 | 4.2 | 4.7 | 5.3 | 5.9 | 6.6 | 7.5 | 8.5 | 10.2 | 13.7 | 17.0 | 20.4 | 23.6 | |
200 | 5.2 | 5.8 | 6.5 | 7.4 | 8.2 | 9.1 | 10.3 | 11.8 | 14.1 | 19.0 | 23.5 | 28.2 | 32.7 | |
250 | 6.8 | 7.5 | 8.5 | 9.6 | 10.7 | 11.9 | 13.5 | 15.4 | 18.5 | 24.8 | 30.7 | 36.9 | 42.7 | |
2.5 |
10 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.4 | 0.4 | 0.5 | 0.7 | 0.8 | 1.0 | 1.2 |
50 | 1.0 | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 2.0 | 2.3 | 2.7 | 3.6 | 4.4 | 5.2 | 6.0 | |
100 | 2.2 | 2.4 | 2.7 | 3.0 | 3.3 | 3.7 | 4.1 | 4.7 | 5.6 | 4.7 | 9.1 | 10.9 | 12.6 | |
150 | 3.4 | 3.7 | 4.2 | 4.7 | 5.2 | 5.8 | 6.5 | 7.3 | 8.7 | 11.5 | 14.2 | 17.0 | 19.6 | |
200 | 4.7 | 5.2 | 5.8 | 6.5 | 7.2 | 8.0 | 9.0 | 10.2 | 12.1 | 16.0 | 19.6 | 23.5 | 27.1 | |
250 | 6.1 | 6.8 | 7.5 | 8.5 | 9.4 | 10.4 | 11.7 | 13.3 | 15.8 | 20.9 | 25.7 | 30.7 | 35.4 | |
3.0 |
10 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.9 | 1.0 |
50 | 1.0 | 1.1 | 1.2 | 1.3 | 1.4 | 1.6 | 1.8 | 2.0 | 2.4 | 3.1 | 3.8 | 4.5 | 5.2 | |
100 | 2.0 | 2.2 | 2.4 | 2.7 | 3.0 | 33 | 3.7 | 4.2 | 4.9 | 6.5 | 7.9 | 9.4 | 10.8 | |
150 | 3.1 | 3.4 | 3.8 | 4.3 | 4.7 | 5.2 | 5.8 | 5.6 | 7.7 | 10.1 | 12.3 | 14.7 | 16.8 | |
200 | 4.3 | 4.8 | 5.3 | 5.9 | 6.5 | 7.2 | 8.0 | 9.0 | 10.7 | 14.0 | 17.0 | 20.3 | 23.3 | |
250 | 5.7 | 6.2 | 6.9 | 7.7 | 8.5 | 9.4 | 10.5 | 11.8 | 13.9 | 18.3 | 22.3 | 26.5 | 30.5 |
Related Resources: