Wall thickness, pressure rating and Price
The difference between schedule 40 and 80 pvc is the wall thickness and schedule 80 is thicker then schedule 40 so the higher the schedule number the thicker the wall of the pipe thus can hold more pressure.
Yes
Christy's 'Red Hot Blue Glue' is an excellent product to use on Sch.80 or 40 PVC.
In the electrical industry there are two grades of PVC conduit. Schedule 40 and Schedule 80. The code designates that schedule 80 be used in above ground construction and schedule 40 and/or schedule 80 be used in acceptable underground applications.
40 degrees F
It is the wall thickness heavier then schedule 20 lighter then schedule 80
10/40 is the same as 1/4. The difference between 10/40 and 10/42 is 2/(40*42) = 1/840 = 0.00119 20/80 is the same as 1/4. The difference between 20/80 and 20/82 is 2/(80*82) = 1/3280 = 0.000305 30/120 is the same as 1/4. The difference between 30/120 and 30/122 is 2/(120*122) = 1/7320 = 0.000137 40/160 is the same as 1/4. The difference between 40/160 and 40/162 is 2/(160*162) = 1/12960 = 0.00007716 So, the last fraction is the nearest.
Schedule of pipe most commonly refers to the thickness of the wall of the pipe itself. ex...schedule 40 PVC pipe has a thinner wall than sch. 80 PVC
There is a difference in memory and the 80 GB can play ps2 games.
7,020 - 6,940 = 80 80/2 = 40 6,940 + 40 = 6,980 = 7,020 - 40
If you require higher pressure higher wall thickness of pipe you should use sch 80 pipes.
176°F or 80°C is the melting point of PVC.