LCREP you say 'The sprinklers in the booth are met as property protection, not life safety.', but the code still demands 'quick response as possible'. And we aren't interested in working spraying flammables without life safety devices like quick operating sprinklers. That's kind of crazy. Thats...
Im building a container to hold the heads and actually have them loaded with water. Then I plan on having 2 thermometers inside the bags and two outside and filming the entire tests. We plan on burning paper and automotive paint with cardboard and place the fire at car height and have the heads...
Of the tests I did with bags being placed looser than the picture shows, there was a longer delay, the inside cellophane bag temp was at 86 f when the outside was at 160.
This is cellophane bag allowed to get to 425 and the head is blown. The water cools off the plastic and it stays behind restricting the flow, just like the feared paint was supposed to do. I attached a...
And a paper bag that someone would use is like a lunch bag. It keeps the head cool for 5 minutes. The paper just cooks and the air inside doesn't change much. Very good insulator. In 5 minutes the entire booth is consumed with fire. I'll bet booth fires are always devastating because of the bagging.
cellophane of the described thickness in the code melts at 350 degrees. Well before that it shrinks and wraps the head. Its a bad idea, no one tested that.
I still have not seen any proof of any real tests on the cellophane or thin bags. Wax is the answer, it melts at 140 and would fall out of the way taking any paint with it, then the heads would not get restricted by paint or bag. A good smear of a wax from a toilet bowl ring on each side of the...
I agree to bag the plenum and duct heads because they are in the line of spray. Its the main heads over the cars that the human would be near that I think should be kept clear of any cover. I bag the duct heads and change those bags, but they never get wet spray on them. Its just fine duct...
I was in a fire once. Burnt my right side and all my skin fell off my arm and hand. Laquer thinnner fume caught by static. I stumbled outside and it was raining. I remember thinking how nice it was that is was raining right then. It cooled the skin and while the adrenaline was pumping it was...
I did a test this morning, the uncovered head popped at 155 before the tightly covered cellophane head hit 83 degrees f. The cellophane did not distort or shrink or melt at all at 155. the uncovered head was not loaded with water either, which would keep it even cooler.
The wording of 'location or covering' was added in the 2007 edition. Prior to that they just said 'protect'. My argument back then was that we are the protectors, we as the workers do the protecting. We dont need no stinking baggies.
My fire inspector said he has not seen paint on the bags of other shops. So they dont need the bags either.
I think it needs to be addressed because an uncovered head will save someone's life, and the covered/bagged head will delay it long enough to kill someone.
The inspections that are done yearly are to note if a head has paint on it. So someone knows its there. The fire dept then demands they be replaced. And should now just fine them so they can pay for the follow up inspections.
The nfpa33 2016 also calls training 'required' and to be documented. So bodyshops are to train their people about static electricity, how the sprinkler works, cleaning the booth, removing the dry overspray, etc. So if 1000's of shops are letting paint get on their heads, then they also arent...
Im perfectly happy with a 40 second to 60 second response, like the 155 degree heads will give me if they are left unadulterated. Im going to film the response so you guys can see. The cellophane melts and wraps the head with a thick plastic shrinkwrap. Ill do it with 4 digital thermometers and...
