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6

Technical Data TD00405018E

Effective August 2009

Generator Sizing Guide

EATON CORPORATION www.eaton.com

Table 4. Fuel Pipe Sizing

Natural Gas (Values are maximun pipe run in ft.)

kW

Pipe Size (in)

0.75” 1” 1.25” 1.5” 2” 2.5” 3”

7-8 55 200 820

10 20 85 370 800

13-14 10 50 245 545

16-17 40 190 425

20 20 130 305 945

22 15 115 260 799

25 10 95 220 739

27 85 203 552

30 60 147 565

35-36 35 95 370 915

40 25 75 315 790

45 15 60 260 650

48 50 230 585

50 50 220 560

60 25 145 390 1185

70 5 75 225 710

80 65 195 630

100 40 140 460

130 50 215

150 30 150

LP Vapor (Values are maximun pipe run in ft.)

kW

Pipe Size (in)

0.75” 1” 1.25” 1.5” 2” 2.5” 3”

7-8 165 570

10 70 255 1000

13-14 45 170 690

16-17 25 130 540

20 15 115 480

22 85 365

25 60 275 605

27 55 260 575

30 40 195 435

35-36 20 125 290 1030

40 15 107 250 890

45 82 195 725

48 70 165 620

50 70 160 610

60 45 115 445 1095

70 20 60 260 660

80 15 50 230 590

100 30 165 430 1305

130 70 205 660

150 45 150 490

LP

•

LPG: 8.55 ft

3

/lb., 4.24 lbs./

gal., 2500 btu/ft.

3

•

LPG: 36.3 ft3 = 1 gal.

Natural Gas

•

1 cubic foot = 1,000 BTU.

•

1 therm = 100,000 BTU.

•

Gas consumption = 13,000-

16,000 BTU per kW/hr.

Pressure

•

1 inch mercury = 13.61

inches water column.

•

1 inch Water Column = 0.036

psi.

•

5-14 inches water column =

0.18 psi to 0.50 psi.

Note:

•

Pipe sizing is based on 0.5"

H

2

O pressure drop.

•

Sizing includes a nominal

number of elbows and tees.

•

Please verify adequate

service and meter sizing.

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