A little background may help. A few years ago there was a large number of glue joint failures and most where as a result of a service call. I personally visited with the contractor and installer about their loss. Blazemaster was saying the these losses were caused by fitters that were not trained. This was simply not true. Some of the largest losses were experienced by some very good, well trained fitters. So why then were the joints pulling out after being glued? After much testing ourselves we found that CURE TIME will vary depending on temperature, humidity, square cut of pipe, water pressure after water turned on and whether or not pipe is all the way home. The real world we work in is different than doing testing at UL with perfect conditions including controlled humidity, temperature and perfectly saw cut pipe pushed and held at pipe stop. To prove our point to ourselves we went out in the field and cut out VPVC fittings that had been installed with system in operation for a period of time and found that even though many joints were not perfect they held with no problem because they had time to cure.
We did have a CPVC summit with all the manufacturers and a number of contractors participating to review installation guidelines. CURE TIME WAS on the list for new testing. Spears changed their guidelines to 24 hour minimum and Blazemaster is still committed to do the testing. The good news is that the acceptance of 24 hour minimum CURE TIME has dramatically reduced these losses. RelMark appreciates all of your comments and if you need any additional information or have questions please call. Top Myers RelMark Group 961 Pottstown Pike Chester Springs, PA 19425 Office 610-321-2415 Cell 610-952-0965 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jim Davidson Sent: Monday, January 18, 2010 1:16 PM To: [email protected] Subject: RE: Cure times To all: For the reason for the recommended 24 hour cure time go to the RelMark website www.relmarkgroup.com and click on "Building Owner insists CPVC system be charged before curing? Get a release!" to see some alternative ways to work with the owner. And to protect the contractor and his assets. Regards Jim Davidson Jim Davidson Davidson Associates Fire Protection * Medical Gas * Code Consulting 302-994-9500 Fax:302-234-1781 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Tom Duross Sent: Wednesday, January 13, 2010 2:15 PM To: [email protected] Subject: RE: Cure times Here, we have to write the impairment procedure. I have to sit with client every time. What a gyp! td Impairments are also covered in #25, but it's something you can reference, excerpt and forward to the OWNER to implement- we have enough risk in this business. I have always made the owner take care of this procedure, I just give him or her the information and let them run with it. Jim Johnston But let us remember that Impairment is the owners responsibility and not the contractors. Coordinating impairment procedures exposes the contractor to additional risks. I would advise the owner to consult the local Fire Marshal. _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
