How to Calculate the Gas Loss in a Pipe

Any break in a pipe will reduce how much gas reaches the outlet.
••• gas pipeline image by Victor M. from

When a gas pipe has a hole or a break in it, the pipe leaks gas continuously. The rate of this gas flow depends on two factors. A larger pressure of gas produces a larger force expelling the gas. A larger hole provides a greater area over which that pressure can act. You can determine the gas pressure, if you don't know it, using a pressure gauge. To factor in the area, consider the hole's diameter if it is round or estimate its approximate diameter otherwise.

    Add 14.4 to the pipe's pressure, measured in pounds per square inch, to convert it to absolute pressure. If, for instance, the pressure is 27 pounds per square inch: 27 + 14.4 = 41.4 pounds per square inch.

    Square the diameter of the hole in the pipe. If, for instance, the pipe has a break that measures 0.75 inches in diameter: 0.75 ^ 2 = 0.5625 square inches.

    Multiply together the answers to Step 1 and Step 2: 41.4 x 0.5625 = 23.29.

    Multiply the answer by 1,000, a conversion constant: 23.29 x 1,000 = 23,290 cubic feet of gas per hour.

Related Articles

How to Calculate CFM to MPH
Describe the Formation of Both Positive & Negative...
How to Find Partial Pressures
How to Convert mm Hg to in Hg
What Happens When Gas Is Heated?
Volume Vs. Mass Density
How to Calculate the Temperature Drop Due to a Pressure...
How to Find the Cross Sectional Area of a Pipe
How to Calculate Heat Loss During Pipeline Depressurization
What Causes Gas Pressure?
How to Convert ATM Pressure to Celsius
How to Make Easy Dry Ice
How to Calculate the Fluid Flow Through a Hole in a...
How to Calculate Stack Exit Velocity
How to Calculate Flow Rate With Pipe Size and Pressure
How to Convert ATM to Moles of Gas
Easy Home Experiments Using Gas Laws
What Three Factors Affect the Pressure of the Gas in...
How to Convert Vapor Pressure to Concentration
How to Solve for Volume