Gas Piping Systems Flashcards

What is the required pressure test for new gas piping before placing it in service under the International Fuel Gas Code?

Answer: 3 psi for 10 minutes

New gas piping systems must be pressure tested at no less than 3 psi gauge for a minimum of 10 minutes to verify there are no leaks before the gas is turned on.

A gas appliance connector flexible hose may NOT be used to connect which type of appliance?

Answer: Built-in oven

Built-in ovens are considered permanently installed appliances and must be connected with rigid piping, not flexible appliance connectors.

When gas piping passes through a wall, floor, or ceiling, it must be protected by:

Answer: A sleeve or protective coating

Gas piping penetrating walls, floors, or ceilings must be protected with a sleeve or protective coating to prevent abrasion damage to the pipe.

What is the specific gravity of propane compared to air?

Answer: 1.5 (heavier than air)

Propane has a specific gravity of approximately 1.5, making it heavier than air, which causes it to settle in low areas such as basements and pits.

The BTU content of one cubic foot of natural gas is approximately:

Answer: 1,000 BTU

Natural gas contains approximately 1,000 BTU per cubic foot, a value used in load calculations when sizing gas piping and meters.

Which of the following joints is NOT acceptable for use in gas piping systems?

Answer: Solvent-cemented plastic pipe joints

Solvent-cemented joints on plastic pipe are not acceptable for gas distribution inside buildings, as they are not rated for gas service in above-ground applications.

A manual shutoff valve must be installed within what distance of each gas appliance?

Answer: 6 feet

The IFGC requires a manual shutoff valve to be installed within 6 feet of each gas appliance to allow for quick isolation in an emergency.