PFDistributors.com and HVACware.com provide natural gas pipe charts with BTU per hour ratings. The PFDistributors.com chart covers specialized high-pressure pipelines, and HVACware.com’s chart is for regular gas lines.
High-pressure natural gas lines are pipes that carry natural gas at greater than 1.5 pounds per square inch. Interstate transportation natural gas lines, for example, are under high pressure. Residential natural gas pipe handles pressures at 0.5 psi or lower. The charts on PFDistributors.com and HVACware.com cover line pipe from 1/2- to 4-inch OD in cubic feet per hour. Multiply the given cubic feet per hour by 1,000 for BTUs per hour at sea level.