high temperature glue

[orlandotech]

I don't know if any of you guys have run into this but in orange county fla they are starting to enforce the code that a high temperature gasket be used betweem the top of the grease duct and the bottom of the grease fan at the curb. we finally found the high temperature gasket but have no source for any high temp glue. he will not accept using armaflex glue nor can you use any mechanical fastners. does anyone know a source for the glue that is acceptable to use in this application or can someone post a link to the code so I can see how it's worded? I think this is another stupid code that just makes are job harder. I don't care about installing the damn gasket but we have no idea where to get the glue. Grainger doesn't carry either item. we ended up finding the gasket material at a local hose supplier.

Any help would be appreciated.

[joeywrists]

try this http://www.uri.com/is-bin/INTERSHOP.enfinity/WFS/PrcTransaction/en_US/-/USD/ViewCatalog-Browse?CatalogCategoryID=Dh%2esEEGSN8oAAAESP1eqgJs h&OnlineFlag=1

[orlandotech]

thanks. I think the glue has to at least withstand 600*F flare up. the plans noted that the fan has to be able to endure those temps and handle 300*F during normal operation.

[Mstrav]

I will post a link to what you need, I get mine from poteroff in so cal. It is the same material on fire rated access doors. its a "gasket" and is rated to 1200 degrees, its been required in nevada and so cal, just not all inspectors know about it. it has an adhesive on one side and you just form a square on the curb to make a seal, no extra glue needed.

matt

[orlandotech]

thanks. I think my boss may have bought the gasket material already but i'm still interested in the link.

the post from joey got me thinking. does anyone know if using an industrial grade high temp silicone or RVT would work. I found some that is rated up to 700*F. has anyone used something like this to glue one of these gaskets down? Here's the link to the page in Grainger's book:

http://www.grainger.com/Grainger/wwg/viewCatalogPDF.shtml?browserCompatable=true&adobeCompatable=true&toolbar=false&CatPage=2527

I know it sounds like i'm grasping at straws sort of but we have been trying to get this part of the project resolved since we started this restaraunt job and have had plenty of time due to engineers screw-ups and a whiny restaraunt manager across the street ( Long story. I will post if some people are interested though ). Still no luck. I know it will be a short time before the other areas start enforcing this dumb crap ( org. county seems to be the leader in enforcing the new stuff before the ink is dry sometimes ) so we need to get a source for it for the future buildouts.

[Mstrav]

I will find you the link, the only time I have been allowed to use automotive type rtv was on some tube style radiant heater connections on some pep boys store, and the inspector wanted the submital, real pain in the balls!!!

you just need the gasket with the adhesive back its a breeze, dont try the rtv. I have gone through this same thing before, I may just give you the rep out in cali's number to get it. the only thing that sucked was I had to buy a box, but if you do grease fans you will use it.

the gasket is rated for 1500 degrees just like a grease access door nfpa 96 is the rating requirement

[Mstrav]

here is some info:

per greenheck:
Fan to Duct Sealant - sealant or gasket shall be rated for 1500o F (815o C) and shall be grease tight such as 3M Fire Barrier 2000+ Silicone Sealant.


this is the code requirement: (international mechanical code 2003)

506.3.2.3 Duct-to-exhaust fan connections.Duct-to-exhaust fan connections shall be flanged and gasketed at the base of the fan for vertical discharge fans;shall be flanged, gasketed and bolted to the inlet of the fan for side-inlet utility fans; and shall be flanged, gasketed and bolted to the inlet and outlet of the fan for in-line fans.

you'll like this from NFPA:

Gasket Material – there is no flex-sealant (silicone) rated at 1500 degrees F. NFPA #96 4-3.4.4 does not allow for the use of any flexible sealants.




the product you need is a ceramic fiber and it comes in dif thickness's and widths I will find it and get you a link rated to 2300 or 3000 I think which is just like the grease access doors

matt

[orlandotech]

thanks matt. this sh*t has been a pain in the ass ever since we took this job. It's an enforced code with no source for materials it seems like. the first time we ran into this the inspector allowed us to use armaflex glue to attatch the gasket material, which we just ripped the fire rope out of grease duct access doors and laid it on top of the duct. this inspector won't go for that. he claims that the armaflex glue is combustable even when dry or not the approved glue for this appl. How much is a box of the gaskets? If it's really expensive I don't think the boss will go for it. We don't do many hoods over the course of a year. just do them if the buildout has one so having a 10 year supply of this may not sit well. I hope we can get this resolved quickly. I'm tired of dealing with it.

[pipes6]

check out "cotronics.com", graham

[orlandotech]

check out "cotronics.com", graham

thanks. I think we ended up calling Captive Aire and they had a ceramic fiber gasket rope w/ a adhesive back that was good to 1500*F. It is sold in a 50ft box for about a hundred bucks. I don't know if we ordered it yet but I know we're gonna have to have it to final out this job.