TABLE - H
MULTIPLE APPLIANCE INSTALLATIONS
GAS PIPING SIZE CHART
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| Iron Pipe |
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| Length of Pipe in Straight Feet |
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| Size, Inches |
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| 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 125 | 150 | 175 | 200 |
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3/4 | 369 | 256 | 205 | 174 | 155 | 141 | 128 | 121 | 113 | 106 | 95 | 86 | 79 | 74 | |
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1 | 697 | 477 | 384 | 328 | 292 | 267 | 246 | 226 | 210 | 200 | 179 | 164 | 149 | 138 | |
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1 1/4 | 1,400 | 974 | 789 | 677 | 595 | 543 | 502 | 472 | 441 | 410 | 369 | 333 | 308 | 287 | |
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1 1/2 | 2,150 | 1,500 | 1,210 | 1,020 | 923 | 830 | 769 | 707 | 666 | 636 | 564 | 513 | 472 | 441 | |
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2 | 4,100 | 2,820 | 2,260 | 1,950 | 1,720 | 1,560 | 1,440 | 1,330 | 1,250 | 1,180 | 1,100 | 974 | 871 | 820 | |
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2 1/2 | 6,460 | 4,460 | 3,610 | 3,100 | 2,720 | 2,460 | 2,310 | 2,100 | 2,000 | 1,900 | 1,700 | 1,540 | 1,400 | 1,300 | |
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3 | 11,200 | 7,900 | 6,400 | 5,400 | 4,870 | 4,410 | 4,000 | 3,800 | 3,540 | 3,300 | 3,000 | 2,720 | 2,500 | 2,340 | |
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4 | 23,500 | 16,100 | 13,100 | 11,100 | 10,000 | 9,000 | 8,300 | 7,690 | 7,380 | 6,870 | 6,150 | 5,640 | 5,130 | 4,720 | |
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Maximum Capacity of Pipe in Thousands of BTU’s per hour for gas pressures of 13.5 Inches Water Column (0.5 PSIG) or less and a pressure drop of 0.5 Inch Water Column (Based on the calorific value of Natural Gas, 1025 Btu/ft3 @ 0.60 Specific Gravity)
GAS PIPING
FIG. 16 Gas Line Connection
All gas connections must be made with pipe joint compound resistant to the action of liquefied petroleum and natural gas. All piping must comply with local codes. Tubing installations must comply with approved standards and practices. Reference Figure 16 for a typical installation.
Install Piping to Control
1.The gas line should be a separate line direct from the meter unless the existing gas line is of
sufficient capacity. Verify pipe size with your gas supplier.
2.Use new, properly threaded black iron pipe free from chips. If tubing is used, make sure the ends are cut squared, deburred and clean. All tubing bends must be smooth and without deformation. Avoid flexible gas connections. Internal diameter of flexible lines may not provide proper volume of gas.
3.Run pipe or tubing to the gas valve or manifold inlet. If tubing is used, obtain a tube to pipe coupling to connect the tubing to the gas valve or manifold inlet.
4.Thread pipe the proper amount for insertion into gas valve or manifold inlet as shown in Table H. DO NOT OVER TIGHTEN. Over tightening may result in damage to the gas valves. Valve distortion or malfunction may result if the pipe is inserted too deeply into the gas valve.
5.Apply a moderate amount of good quality pipe compound (DO NOT use Teflon tape) to pipe only, leaving two end threads bare.
6.Remove seal over gas valve or manifold inlet.
7.Connect pipe to gas valve or manifold inlet. Use wrench to square ends of the gas valve (FIG. 17).
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