Ron Greenman wrote:
Chris,
Cure times are in the manufactures' literature at are specific to pipe
size and ambient temperature per manufacturer (or at least supplier of
resin). Make sure you file documentation with the job file as to what
you did since it may save you later. I've heard of a suit involving a
penthouse apartment and a Monet that questioned cure time that is
around $8M.
On 10/19/07, Todd Williams - FPDC <[EMAIL PROTECTED]> wrote:
It seems to me I read somewhere something about 24 hours cure time
before a 200# test
At 03:09 PM 10/19/2007, you wrote:
It is going to be in the book for the type pipe you are using. The cure
times are listed, but there is an area in most of them for reno's to
existing plastic. I can't remember seeing 24 hours before. I think that is
just a standard SOP for most companies. Watch the Temp changes because after
a certain temp, you can't even work with plastic until you bring the room to
a minimum temp.
Matt
Matthew J. Willis
Living Water Fire Protection, LLC.
1160 McKenzie Rd.
PO Box 877
Cantonment, FL. 32533
850-937-1850 Voice
850-937-1852 Facsimile
[EMAIL PROTECTED]
----- >-----Original Message-----
----- >From: [EMAIL PROTECTED]
----- >[mailto:[EMAIL PROTECTED] On
----- >Behalf Of Chris Cahill
----- >Sent: Friday, October 19, 2007 2:05 PM
----- >To: [email protected]
----- >Subject: Plastic cure times
----- >
----- >We don't do a lot of plastic work and what little we do
----- >is new work. We
----- >seem to recall we're supposed to allow the glue to cure
----- >for 24 hrs before returning an existing system to
----- >service. Even longer for 2" and larger.
----- >But when we look at 2 different manufactures recommended
----- >guidelines they don't match our memory. We can go 1.5
----- >hours for 1" and 8 hours for 2" and up for brand A and
----- >30 minutes up to 2" and 1.5 hrs for larger for brand B.
----- >Has the glue changed that much the 24 hrs is no longer
----- >valid? Has our memory just failed and it never was 24
----- >hrs? Does the 24 hrs. come from some other source?
----- >What are some of your policies on modifying existing CPVC?
----- >
----- >
----- >
----- >
----- >
----- >Chris Cahill, P.E.
----- >
----- >Fire Protection Engineer
----- >
----- >Sentry Fire Protection, Inc.
----- >
----- >
----- >
----- >763-658-4483
----- >
----- >763-658-4921 fax
----- >
----- >
----- >
----- >Email: [EMAIL PROTECTED]
----- >
----- >
----- >
----- >Mail: P.O. Box 69
----- >
----- > Waverly, MN 55390
----- >
----- >
----- >
----- >Location: 4439 Hwy 12 SW
----- >
----- > Waverly, MN 55390
----- >
----- >
----- >
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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We are in the middle of renewing our general liability insurance and
every insurer wants a mandatory 24 hour cure time on CPVC regardless of
size, ambient temperature or whether renovation or new. We have even had
two companies that would refuse to insure if the 24 hour cure time did
not become company policy.
Jim Deason
Priority Fire Protection, Inc.
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