The pressure a PVC pipe can withstand depends on its size, wall thickness, and schedule. For example, Schedule 40 PVC can handle up to 450 PSI for smaller diameters at room temperature, while Schedule 80 PVC has higher pressure ratings, reaching up to 630 PSI for smaller sizes.
Many PVC pipes are rated for 300-600 PSI. Since the average industrial compressed air system is pressurized to 100-125 PSI, this may sound like it is more than enough.
Schedule 80 PVC pipes can handle up to 280 psi, but for regular home applications, schedule 40 PVC pipes should do the trick.
One of the best things about PVC pipe is how strong it is! For just a few dollars you can have a material strong enough to support human weight. This is especially true when dealing with children, as they (obviously) do not weigh as much as adults.
Mains water pressure is typically between 2 and 6 bar. PVC, ABS and other industrial thermoplastic pipe systems are designed to operate at between 10 and 16 bar.
As per estimation, schedule 40 1.5 inch diameter PVC pipe can take 954 pounds of tensile strength, and schedule 80 1.5 inch diameter PVC pipe can take 1225 pounds of tensile strength. Tensile strength is simply the most weight that can be put on something before it breaks.
Barlow's Formula relates the internal pressure that a pipe can withstand to its dimensions and the strength of its materials. The formula is P= (2*T*S/D), where: P = pressure. S = allowable stress.
PVC conduit shall not be used under the conditions specified in 352.12(A) through (E). In any hazardous (classified) location, except as permitted by other articles of this Code. For the support of luminaires or other equipment not described in 352.10(H). Where subject to physical damage unless identified for such use.
Flexibility and convenience.
It's no secret that using a flexible plumbing line is more convenient and easier than a standard copper or PVC pipe. Less rigidity means more room for errors and flexibility with the job.
Schedule 40 PVC is usually white in color and has thinner walls, thus can handle less pressure than it's counterpart. Schedule 40 PVC pipe works best for low water pressure applications. By contrast, Schedule 80 PVC is usually gray in color and has thicker walls; therefore, it can handle higher water pressures.
Galvanised steel pipe
Galvanised steel is perhaps the most common material used for carrying compressed air. It is a material that installation technicians are very familiar with. The galvanised coating extends the life of the pipe and protects it from rust.
For plumbing or household water supply, PVC pipes are typically rated to handle a maximum pressure of around 100 to 150 pounds per square inch (psi). It's crucial to adhere to local building codes and manufacturer specifications to ensure safe and proper installation.
In terms of mechanical strength, maximum-minimum operation temperatures, and pressure tolerance, stainless steel has the upper hand. However, PVC excels in terms of insulation to hot cold influences, its resistance to electrical conduction and its ease of installation.
PVC is a hard material but it is relatively brittle at room temperature because it has polymer chains that are long and packed closely together. If PVC is plasticised it is used in electrical cable insulation, flooring tiles and clothing. When a plasticiser is added to PVC, it makes it more flexible and bendable.
PVC is also strong but less flexible and more prone to cracking and failure. Both pipes can handle standard water pressure surges common in pipelines. However, with PVC, the pipe can handle 100 psi above its pressure class.
PVC Class-200 pipe is used in pressure systems where temperatures will not exceed 140°F. It is highly resilient, with high-tensile and high-impact strength.
FlowGuard Gold CPVC Can Handle the Pressure
With a pressure rating of 400psi at room temperature and at least 200psi up to 140°F you can trust FlowGuard Gold CPVC to provide peace of mind that your plumbing pipes can stand up to the pressure found in your projects.
Common Pressure Ratings for Black Iron Pipe Fittings
Schedule 40 pipes are commonly used in these systems as they offer a moderate wall thickness, allowing them to handle pressures typically ranging from 150 to 200 PSI, depending on the pipe diameter and temperature.
Not surprisingly, because of its intrinsic strength, PVC is also the more expensive product when compared to wood.