Sch 80 pipes have thicker pipe walls and are costlier compared to sch 40 pipes.
Pvc schedule 40 vs 80 vs 120.
If the pipe is a schedule 40 80 or 120 size the schedule number and the pressure rating in pounds per square inch.
The thickness of the pvc wall becomes more important when dealing with larger pipes.
Despite its deceiving title schedule doesn t have anything to do with time.
Schedule 40 vs schedule 80 pvc.
Maybe you ve seen that schedule 80 pipe is slightly more costly than schedule 40.
The material designation code indicating the type of plastic.
Only the inner diameter will change and the cpvc pipes diameter will remain the same for both the schedules.
2 schedule 80 pipes will be rated up to 400 psi compared to a rating of 280 psi for 2 schedule 40 pipe.
Schedule 40 has thinner walls though then the schedule 80 pvc pipe so it is used in systems where the low pressure of water is involved.
Smaller pipe diameters will result in a stronger pipe and thus will withstand higher water pressure.
If not maybe read it again.
All schedule 40 piping no matter the diameter of the pipe has 3 8 walls.
If you ve been shopping around for pvc you may have heard the term schedule.
As the temperature of the pvc increases the pressure that the pvc can withstand will decrease.
Schedule 40 pvc is usually white in color and schedule 80 is usually a dark gray they can also be found in other colors.
Schedule 40 and schedule 80 have the same outside diameter.
Schedule 80 pipe has 1 2 walls and conforms to the old extra strong label up to 8 in diameter.
For example pvc 1120.
For pvc fitting schedule 40 and pvc fittings schedule 80 the optimal temperature at which pvc can operate at the highest psi would be 73 degrees fahrenheit.
Schedule 40 vs 80.
If seeking to understand pipe scheduling especially for pvc and cpvc our article above hopefully shed some light on the definition key differences and usage considerations for both schedule 40 and schedule 80.
There are two common types of pvc pipe schedule 40 pvc and schedule 80 pvc.
A pvc pipe s schedule has to do with the thickness of its walls.
A 1 pipe of schedule 40 and schedule 80 has same outside diameter.
Astm american society for testing and materials have come up with the schedule 40 and 80 for different plumbing applications.
With schedule piping obviously the smaller the diameter of the pipe the more pressure the pipe can take as the wall thickness of the pipe is the same.
Schedule 40 vs schedule 80 pvc wall thickness.
The chart below will illustrate the pressure derating of pvc as temperatures increase.
Schedule 40 vs schedule 80 takeaways.
