PVC and ozone

[wooden_reefer]

How resistent to Ozone is PVC pipes?

If I use small Sch 40 PVC pipes to carry most of the way of Ozone, how long can I expect the pipes to last?

 

[nuccadoc]

You should be fine. Do you know what the concentration in solution will be? Anything higher than 30% should use glass or stainless.

 

[billsreef]

PVC is considered ozone safe for normal aquatic applications.

 

[Randy Holmes-Farley]

PVC is resistant to ozone. I show that in a table in this article:

Ozone and the Reef Aquarium, Part 2: Equipment and Safety
http://reefkeeping.com/issues/2006-04/rhf/index.php

 

[vegaskid11]

What about acrylic? Is that on your chart Randy? Is the acylic typically used in skimmers poly methyl methacrylate?

 

[vegaskid11]

just found this paragraph in your article Randy

"A variety of different systems can be used as contact chambers, and most reef aquarists choose to use skimmers. They use either their main skimmer or a smaller, inexpensive one that can run at a lower flow rate and potentially be sacrificed if the ozone degrades the plastic to the point where it no longer is reliable. Despite their widespread use with ozone, skimmers are not usually an optimal way to employ ozone for several reasons"

 

[Randy Holmes-Farley]

Acrylic can be reasonably resistant to ozone.

http://www.moldeddimensions.com/generalpolymers.htm

ACRYLIC (ACM) Polyacrylate

Advantages: Outstanding resistance to heat and hot oil; excellent resistance to weather, ozone, sunlight and oxidation; very good resistance to gasoline and oil, especially those that contain sulfur.

Limitations: Poor resistance to alcohols, alkalis, solvents, and aromatic solvents; limited flexibility at low temperatures; inferior resistance to water and steam; slow vulcanization rate.

Comment: Heat resistance of acrylic is superior to that of any other elastomer except silicone and fluorocarbon. It performs well in both hot air and hot oil for extended periods without significant loss of physical properties. Acrylic has moderate resistance to cut growth and flex cracking. Use of acrylic is limited by its inferior flexibility at low temperatures, poor processing properties, and slow vulcanization rate. A post cure is necessary to obtain the best characteristics. Low temperature service of acrylic is possible to only about -20F. However, some types of acrylic that have improved low temperature flexibility at the expense of tensile strength and oil resistance are available.