looking for the best material
looking for the best material
(OP)
We are looking for the the best material to use to remodle a foam line. The foam consists of sodium hypchloride (bleach) they are telling me that is a 10% mix.
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looking for the best material
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looking for the best materiallooking for the best material(OP)
We are looking for the the best material to use to remodle a foam line. The foam consists of sodium hypchloride (bleach) they are telling me that is a 10% mix.
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RE: looking for the best material
What is the service temperature during handling the foam?
Does the 10% concentration you mention pertain to the strength of the sodium hypochlorite solution (bleach) used or to the ratio of bleach to foam solution?
Does the foam contain other chemicals?
RE: looking for the best material
the chemical that they are using is: chlor-10 (10% sodium hydochlorite) they are mixing it with city water. 200ppm
the other chemical they are using is called foam chlor:
ph@1% 12.45; phosphorous content 1.% available chlorine 1%: 265ppm; 50ppm. they are mixing this with city water 4oz per gallon.
they are currently using PVC pipe they want to switch to Stainless steel.
I know you probley need more information, but this is what I know.
thank you.
RE: looking for the best material
Why are you considering changing the PVC piping material? Is it appearance or plumbing code?
RE: looking for the best material
have you heard of duplex 2205? would this work?
RE: looking for the best material
RE: looking for the best material
2205 has good pitting resistance, it is often used in heat exchangers at Cl levels up to 5,000 ppm. It is also a high strength material so you could look at using thinner walls in order to save some costs.
WARNINGS:
You need to buy material that has been properly processed. In addition to ASTM A789 or A790 (tube and pipe), you need to require A923. This will assure that the material was annealed correctly.
The welding procedures need to be qualified for both mechanical properties and corrosion resistance. I would use only automated orbital welds with over-alloyed filler metal. No autogenous or manual welds.
= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: looking for the best material
RE: looking for the best material
I would suggest you get to the bottom of why the PVC pipe joints are leaking. I would guess that the pipe schedule that was originally selected for this application is not adequate, and the joints may be suffering from vibration/bending forces in service, causing them to crack from fatigue. Check the hanger locations to assure adequate support. Changing from PVC to stainless piping will be very expensive in material and especially installation costs!
You should explore the cause of the PVC joint leakage, and solve this problem. This is a much cheaper alternative.
RE: looking for the best material
I just spoke with the end user. They are telling me the pipe is sch 80 pvc. they have replaced all the origanle valves with new ones the are telling me they are using the propre methods for attaching and making joints per the previous company spec. The system has been ther for 10 years. I asked them to make sure they are using the correct "pipe dope" they can back and siad we think we are. I told they to make sure the "pipe dope" is not the problem.
RE: looking for the best material
Switching to a metalic system will cost more than you want to spend.
= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: looking for the best material