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18 Cards in this Set
- Front
- Back
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Can a metallic gas hose extend from one room to another or passed through any wall partition or ceiling or floor |
No |
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When a metallic gas hose is used to connect an appliance to Ridgid Supply piping where is a shut off valve necessary |
In the piping immediately Upstream of the metallic gas hose |
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When a gas hose is used for transferring liquid propane from one container to another what shall it be protected by |
Hydrostatic relief valve located between the shutoff valves |
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The gas connector shall |
Be protected from damage, not passed through a wall floor ceiling or partition, be connected to rigid piping or tubing located in the same area as the Appliance |
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Max length for a corrugated metal gas connector to connect a range fridge or clothes dryer |
6 feet |
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Maximum length of a corrugated metal gas connector used to connect a suspended Appliance |
Two feet |
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Maximum length of a corrugated metal gas connector when hooking up decorative Appliance, a room heater, or a direct vent wall furnace except when the appliance is installed as a free-standing unit |
Two feet |
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Minimum diameter of pressure test gauge used when testing gas lines |
3 in |
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By how much does the maximum range of a pressure gauge used while testing your gas piping system have to exceed the test pressure by |
15% but not more than 300% |
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Pressure test requirement for low pressure gas lines 200 feet or less |
15 psi for 15 minutes |
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Pressure test requirements for low pressure gas lines longer than 200 ft |
15 psi for 60 minutes |
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Pressure test requirements for all welded pipe |
The greater of 50 psi or 1.5 times the maximum operating pressure for 180 minutes |
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If the piping is 4 inch or larger than air has been used for testing what must happened before turning the gas on |
The piping shall first be purged with carbon dioxide or nitrogen, or a mixture of these then Purge with gas |
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What a piping or tubing system is to be purged to the outdoors the purging line shall not terminate closer than how many feet from either a building or air intake |
10 ft |
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How is rooftop gas piping supported |
With treated wood blocks or material having at least equivalent characteristics as wood blocks and protection against outdoor exposure |
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Maximum support spacing for piping one in in greater on a rooftop |
Same as of hanging pipe but also at every threaded fitting |
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Maximum support distance for piping less than one in on a rooftop |
Every 4 ft |
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How is gas tubing supported on a rooftop |
Continuously |
