Piping and Tubing Systems Flashcards
6 cards from real G3 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Piping and Tubing Systems flashcards as text
How is residential gas piping sized?
Answer: Using pipe sizing tables based on BTU load, length, and allowable pressure drop
Piping is sized using code tables considering demand, length, and pressure drop.
What is the difference between black iron and galvanized pipe for gas?
Answer: Black iron is approved; galvanized is not used due to flaking
Black iron is standard for gas. Galvanized zinc coating can flake and clog components.
What is the maximum allowable pressure drop in residential gas piping?
Answer: 0.5 inches water column
Maximum is 0.5 inches WC from meter outlet to furthest appliance.
How should gas piping penetrations through walls be handled?
Answer: Pipe must be sleeved with an approved protective sleeve
CSA B149 requires protective sleeves at wall, floor, and ceiling penetrations.
What is the purpose of an appliance shutoff valve?
Answer: To allow gas isolation for servicing or emergency shutdown of individual appliances
It allows individual appliance gas supply to be turned off without affecting others.
What leak detection method is used after completing a gas piping installation?
Answer: Applying approved leak detection solution to all joints and connections
Approved soap bubble solution is applied to visually identify leaks at pressurized connections.