CPVC piping
CPVC piping
(OP)
Hello,
Can CPVC piping be used in a seawater application (discharge from SW pump)? What is the recommended support span for this piping?
Can CPVC piping be used in a seawater application (discharge from SW pump)? What is the recommended support span for this piping?





RE: CPVC piping
Pipe spans demand on the pipe diameter. Pipe spans are as low as 5 Feet for 2-Inch pipe to 15 feet for 16-Inch pipe.
http://www.ipexamerica.com/Content/Products/Produc...
RE: CPVC piping
I'd be hesitant to use it in a boat.
Mike Halloran
Pembroke Pines, FL, USA
RE: CPVC piping
Though this is about sprinkler piping, the same reservations might be appropriate in other applications:
http://www.wheatland.com/wheatland-standard/fire-s...
Common products that contractors could possibly encounter — like caulk residue or oil on French Fries — could potentially come in contact with the CPVC and may cause the system to drip, crack or fail completely.
“the overwhelming cause of failure is contamination of the CPVC pipes and fittings with incompatible chemicals.”
RE: CPVC piping
RE: CPVC piping
RE: CPVC piping
Other than that, there are a few people who are trying to make a business out of product liability issues.
The quote “the overwhelming cause of failure is contamination of the CPVC pipes and fittings with incompatible chemicals.” is also taken out of context.
Reading further "Using GC-MS we successfully determined the root cause for the sudden increase in failures of CPVC pipe and fittings; i.e., the main contaminants responsible for most of the ESC failures were amines." However, the source of the amines was not conclusively determined.
RE: CPVC piping
Worked years with this stuff.
It is in much cases no good.
especially when (sun)light is involved.
Why not use metal pipe?
RE: CPVC piping
All this nonsense regarding product liability for sprinklers is off post.
There is nothing wrong with the CPVC product when it is properly applied.
RE: CPVC piping
IF the OP is pumping seawater within a boat, then I have a problem with using CPVC.
First, the seawater sucked into a boat is not necessarily nice clean salt water; it includes whatever has been dumped into the water in which the boat finds itself. The boat crew has no control over the composition.
Second, seawater is typically used within a boat to cool the engines. It typically takes a lot of seawater to do that, and the systems within the engine room are normally unattended, so a breach of the seawater piping can quickly flood the engine room, which often enough causes loss of the entire boat. That is a serious risk of considerable collateral damage, which does not balance well against a small savings achieved by not using serious marine grade material.
The OP has not come back to clarify the application, so an unconditional blessing of CPVC for 'seawater service', without further elaboration of the service's exact nature would be irresponsible.
Mike Halloran
Pembroke Pines, FL, USA
RE: CPVC piping
RE: CPVC piping
Europipe is correct, I meant incompatible chemicals on the outside of the pipe; which should have been clear from the context.
I thought the claim about grease from french fries ruining a pipe was ridiculous until I did some research.
Crude oil might also be damaging to CPVC. Installers of pipe on an oil platform are not likely to do meticulous hand washing between handling oil production piping and this seawater piping.
How is a concern for compatibility between material selection and a proposed application "off post"?
RE: CPVC piping
Piping Design Central
RE: CPVC piping
Read the report thoroughly. CPVC is still commonly specified for sprinklers.
RE: CPVC piping
Let's all have a cup of tea, and relax until the OP comes back to rephrase the question within its own context.
Thank you.
Mike Halloran
Pembroke Pines, FL, USA
RE: CPVC piping
I'll take a beer.
RE: CPVC piping