Plumber Red Seal · Question
When using Table 6.3 in the B149.1 Natural Gas and Propane Installation Code to size piping, what key information is required in addition to the total connected load (BTU/h)?
The gas pipe sizing tables are based on the gas pressure supplied, the allowable pressure drop, and the length of the piping. To use the tables correctly, you m
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Question: When using Table 6.3 in the B149.1 Natural Gas and Propane Installation Code to size piping, what key information is required in addition to the total connected load (BTU/h)?
Answer options:
- The number of appliances connected. ✅ The measured gas pressure at the meter and the length of the longest piping run.
- The diameter of the gas meter outlet.
- The ambient temperature of the installation area.
Correct answer: The measured gas pressure at the meter and the length of the longest piping run.
Explanation: The gas pipe sizing tables are based on the gas pressure supplied, the allowable pressure drop, and the length of the piping. To use the tables correctly, you must know the initial pressure and measure the developed length of the longest run to an appliance to find the correct column and row.
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