"Working pressure" is defined as the pressure that a pipe, tubing, or other part is under during standard operating procedures. It is important to know a parts working pressure not not only for safety reasons, but also so that any machinery is equipped with the right parts. Using a part with lower working pressure than required can cause the pipe to burst and cause bodily damage, especially if the substance is harmful.
Things You'll Need
- Working pressure equation: P = (2*S*T)/((O.D.-2*T)*SF)
Multiply the material strength, in pounds per square inch, by the wall thickness of the part in inches. Multiply the result by two. Write down this number, as you will need it to finish the rest of the calculation.
Multiply the thickness of the pipe in inches by two. Subtract this figure from the diameter of the pipe to the outside wall, not the inside.
Multiply the resulting figure by the safety factor. This number can range, from 1 through 10. For a basic calculation, use 1.5. Write this second number down so that you can complete the equation.
Take the first number your wrote down and divide it by the second one. The final figure will be the working pressure of the object.
Tips & Warnings
- This equation is to give a general idea of a part's capability. You should always check specifications with the manufacturer, as the manufacturer does extensive testing and know the exact figures. Being off on your math can lead to serious problems.
- Photo Credit industrial refinery image by Chad McDermott from Fotolia.com
What Is the Formula for Calculating Blood Pressure?
Blood pressure is the pressure of circulating blood against the blood vessel walls. This measurement, which is usually taken using a stethoscope,...
How to Calculate Vapor Pressure
If you put a liquid into a closed space, molecules from the surface of that liquid will evaporate until the entire space...
How to Calculate Pulse Pressure
The pulse pressure is the difference between systolic and diastolic blood pressure. In other words, it is a spread between maximum and...
How to Pressure-Test Plumbing
Filling plumbing pipes with pressurized air is a quick and effective way to inspect for leaks in new installation of water pipes...
Measuring Static Pressure Drop in HVAC Ducts
Heating, ventilation, and air conditioning ducts, or HVAC ducts, channel the flow of climate controlled air throughout buildings with centralized systems. Return...
How to Calculate Underwater Pressure
While we surface dwellers live at the bottom of an "ocean" of air, a vertical column of air is thinner than water...
How to Calculate Liquid Pressure
Liquid pressure increases the lower down you go and the denser the liquid. Total pressure at any point should also consider atmospheric...
How to Calculate Flow Based on Differential Pressure
Daniel Bernoulli first defined the relationships between pressure drop and stream velocity in flowing systems in the 1700s. Later, the Bernoulli Principle...
How to Calculate GPM From Differential Pressure
Pressure is the driving force behind volumetric liquid flows expressed in GPM (gallons-per-minute) as it is in any flowing system. This derives...
How Do I Size Furnace Gas Pipes?
Calculating the size gas pipe needed for your furnace may seem complicated, but if you follow a few simple guidelines you will...
How to Calculate the Suction Pressure of a Pump
Operating pumps move fluids in piping systems by creating a low suction pressure at the inlet side and a high discharge pressure...
How to Calculate Theoretical Bursting or Yielding Pressure of Pipes
The theoretical bursting pressure of a pipe determines how much pressure the pipe can withstand without bursting. Theoretical yielding pressure determines how...
How to Calculate Vacuum Tank Stress
The American Society of Mechanical Engineers (ASME) maintains the technical standards for the maximum allowable stress on the walls of a pressure...