Todd- A cut-off (gas powered demo style) with a ductile blade will go through the concrete lining with no problem. Cutting a piece of ductile by hand with a cut-off saw is a true test of one's arms, shoulders and back. My guys hate it but I get very anal about steel before the backflow, we try and have it fabbed but sometimes we have to get a length and cut it ourselves.
Tom I hope it wasn't cement lined ductile if you are cutting it with a chop saw At 09:28 AM 11/30/2007, you wrote: >I'd worked for a firm in the 80's that used DI for large diameter piping >around fire pumps where we field cut spool pieces with a chop saw, added >uni-flanges, and rodded the whole thing together. > >Much easier field installation, and coated pipe on the suction side. > >Other than short stubs, however, I'd try to avoid running DI inside like the >plague. I've seen it done, LHU was one instance in PA, and it wasn't pretty. > >If it's your best option, go do it. > >glc > > >DI is commonly seen hanging under bridges and overpasses for domestic water. >Greg > > > > >Typically black carbon steel is used for the foam-water systems but >galv. can be used. Most foam mfgr. data will state not to used >galvanized piping only where it would be in direct contact with the >undiluted foam concentrate. > >CLDI is typical for UG, have never heard of anyone trying to use it >above ground. Better check it's listing before proceeding down that >road. > >As far as life span, might try calling various pipe mfgrs. and see if >they have any data concerning life cycle based on various installation >conditions. > > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
