HIGH ALTITUDE DERATION CHART
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| NATURAL | GAS |
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Elevation | Odfice | Drill | Pa_ # | Odfce | Dnll | Pa_ # |
| Odfice | Ddll | Pa_ # | Odfice | Ddll | Pa_ # |
| Dia. | Size | Dia. | Size |
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| Dia | Size | Dia. | Size | ||||||||
Sea Level |
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0.136 | 29 | 0,154 | 23 | 0.161 | 20 | 0.180 | 15 | ||||||
2,000 | 0.136 | 29 | 0.149 | 25 | 0.157 | 22 | 0.177 | 16 | |||||
3,000 | 0.128 | 30 | 0,149 | 25 | 0.157 | 22 | 0.173 | 17 | |||||
4,000 | 0.128 | 30 | 0,147 | 26 |
| 0.154 | 23 | 9951=1541 | 0.173 | 17 | |||
5,000 | 0.128 | 30 | 0,144 | 27 |
| 0.152 | 24 | 0.169 | 18 | ||||
6,000 | 0.128 | 30 | 0.144 | 27 |
| 0.149 | 25 | 0.166 | 19 | ||||
7,000 | 0.129 | 31 | 0.140 | 28 | 0.147 | 26 | 0.161 | 20 | |||||
8,000 | 0.120 | 31 | 0.136 | 29 | 0.144 | 27 | 0.161 | 20 | |||||
9,000 | 0.120 | 31 | 0.136 | 29 | 0.140 | 28 | 0.157 | 22 | |||||
10,000 | 0.116 | 32 | 0.128 | 30 | 0.136 | 29 | 0.152 | 24 | |||||
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| PROPANE | GAS |
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Elevation | Orifice | Ddll | Pa_ # | Odfice | Ddll | Pad# |
| Orifice | Drill | Pa_ # | Odfice | Ddll | Pa_ # |
| Dia. | Size |
| Dia. | Size |
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| Dia. | Size | Dia. | Size | ||
Sea Level | 0.082 | 48 | 0.093 | 42 |
| 0.098 | 40 | 0.106 | 36 | ||||
2,000 | 0.081 | 46 | 0.093 | 42 |
| 0.096 | 41 | 0.104 | 37 | ||||
3,000 | 0.078 | 47 | 0.089 | 43 |
| 0.093 | 42 | 0.101 | 38 | ||||
4,000 | 0.078 | 47 | 0.089 | 43 | 0.093 | 42 | 0.101 | 38 | |||||
5,000 | 0.078 | 47 | 0.089 | 43 | 0.093 | 42 | 0.099 | 39 | |||||
6,000 | 0.076 | 48 | 0.086 | 44 | 0089 | 43 | 0.098 | 40 | |||||
7,000 | 0.076 | 48 | 0.086 | 44 | 0.089 | 43 | 0.096 | 41 | |||||
8,000 | 0,073 | 49 | 0.082 | 45 | 0.086 | 44 | 0.096 | 41 | |||||
9,000 | 0.073 | 49 | 0.081 | 46 |
| 8.086 | 44 | 0.093 | 42 | ||||
10,000 | 0.070 | 50 | 0.078 | 47 | 0.082 | 48 | 0.059 | 43 |
Table shows 4% Input Reduction per 1,000 feet Elevation. | For Canadian high altitude (2000 - 4500 feet), reduce gas |
Reference Source: NFPA No. 54, ANSI Z 223.1, National | manifold pressure to 3.0" W.C. for natural gas, 9,0" |
Fuel Gas Code. | W.C. for Propane gas. |
Unitary Products Group | 21 |