The Beckett SM oil burner is not dependent upon a combustion chamber for flame stabilization. Instead, it’s available with a choice of six ...
Gas Pipe Sizing Tutorial
This quick tutorial will guide you through the steps on gas pipe sizing using NFPA 54, the Longest Run Method. Click each image to view larger.
Notice
The methods used below and additional information can be found in NFPA 54 Nation Fuel Gas Code
Add all segments of the piping to each appliance to determine the longest run. In this example the run to the water heater is the longest at 85’.
In this example, the after adding the piping sections we see that the Water Heater is a total of 85’ from the meter, longer than the 75’ run to the Range.
Using the Natural Gas Pipe Sizing table above, we see that the 90’ row is the next highest value that will cover the length of the 85′ total run. We will use this row to size each segment of the system.
Next, add the BTU input for all appliances in the system to determine maximum load. In this case, adding all appliances shows a maximum load of 270,00 BTU/hr.
Segment A/B = 270,000 BTU/hr input. Using the 90’ row on the Natural Gas Pipe Sizing table above, the 320 value will cover the 270,000 BTU load on this segment. Following this column to the top row on the table, 1.25″ IPS will be the correct pipe size.
Segment B/C carries 240,000 BTU/hr after we subtract the Clothes Dryer from the maximum load (270,000 BTUs Total Load – 30,000 BTUs from Dryer = 240,000 BTUs). Using the 90’ row on the Natural Gas Pipe Sizing table above, the 320 value will also cover the 240,000 BTU load on this segment. Following this column to the top row on the table, 1.25″ IPS will be the correct pipe size for this segment as well.
Segment C-D carries 130,000 BTU/hr after we subtract the Boiler from the maximum load (270,000 BTUs Total Load – 140,000 BTUs from Boiler = 130,000 BTUs). Using the 90’ row on the Natural Gas Pipe Sizing table above, the 160 value will cover the 130,000 BTU load on this segment. Following this column to the top row on the table, 1.00″ IPS will be the correct pipe size for this segment.
Each branch will also be sized to the 90′ row on the Natural Gas Pipe Sizing table above. As such:
- Branch 1 (30,000 BTU/hr) will need .5” IPS pipe.
- Branch 2 (140,000 BTU/hr) will need .75” IPS pipe
- Branch 3 (45,000 BTU/hr) will need .75” IPS pipe
- Branch 4 (55,000 BTU/hr) will need .75” IPS pipe
Beckett Training is Now Online
Informative and technical training resources from the leading experts in the heating industry
We're Here to Help!
Have questions about our products? Looking for a solution to address a particular application? Looking to improve the overall productivity and profitability of your operation? Please don’t hesitate to reach out or schedule a no obligation, 1-on-1 consultation with a Beckett Technical Specialist — we’d love to help.
Where to Buy
Beckett solutions are available through our network of Distributors, Independent Representatives, and Export Representatives all around the world.