Sprinklers in Paint Booths
Sprinklers in Paint Booths
(OP)
What type of sprinkler (preferably concealed SR 11.2k) is usually used in a paint booth. Client wants pipe to be concealed, uprights are out of the question. So my dilemma is EH GR2 for paint booth requires 11.2k minimum orifice and I cannot have QR spkrs. Any suggestions?





RE: Sprinklers in Paint Booths
Pre fab booth I take ???
RE: Sprinklers in Paint Booths
RE: Sprinklers in Paint Booths
Also, you may need heads in the exhuast duct if the paint loading is such that it will accumulate on the interior of the ducts.
Provide an isolation valve for the head(s).
RE: Sprinklers in Paint Booths
5.4.1.7.1* Sprinklers subject to overspray accumulations shall be protected using cellophane bags having a thickness of 0.003 in. (0.076 mm) or less or thin paper bags.
Testing has shown that lightweight cellophane or paper bags will not adversely affect the operation of the sprinkler. Sprinklers protected by lightweight cellophane or paper bags may require more frequent inspection than the annual inspection outlined in 5.2.1.1.2 to prevent excessive buildup on the bags. Depending on the use of the spray coating area, the inspection and subsequent replacement of the bags may need to be done daily. In prior editions, NFPA 25 allowed the use of a plastic bag, but this was changed due to concerns about the potential for a plastic bag to shrink prior to sprinkler activation and disrupt the discharge pat- tern. Exhibit 5.28 illustrates a sprinkler protected from overspray by a cellophane bag.
RE: Sprinklers in Paint Booths
RE: Sprinklers in Paint Booths
Plastic baggies similar to the one in little joeys lunch box have been going on these for decades. No problems I have heard of because of this.
RE: Sprinklers in Paint Booths
You will find a heavty heavy duty trash bag cut up and used
RE: Sprinklers in Paint Booths
RE: Sprinklers in Paint Booths
Make sure the bag meets the thickness requirement if not you could run into a problem with the AHJ. I ALWAYS tell my clients the same thing, remove the plastic and use a paper bag. I have a hard time looking at a bag and measuring the bag thickness to see if it is .0003 in, I can figure out what a paper bag looks like...lol.
I spend a lot of time looking at the booth as it is most common cause of loss for us. I can not tell you how many problems we find with booths, no sprinklers in the stack or behind the filters, no shut off valve, nonrated electric in the booth, spraying outside of the booth, mixing of flammables outside designed areas, etc etc. Yea covering the sprinkler is just one of the things we look at.
RE: Sprinklers in Paint Booths
R M Arsenault Engineering Inc.
www.rmae.ca
RE: Sprinklers in Paint Booths
RE: Sprinklers in Paint Booths
RE: Sprinklers in Paint Booths