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#26 Statler

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Posted 08 October 2020 - 10:16 AM

Still got the rear disc parts ?



#27 Rockoz

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Posted 08 October 2020 - 11:44 AM

The exhaust fans dont have anything that will generate a spark in normal usage.

But however, the air compressor does have a set of contacts that will emit a spark hot enough to ignite a gaseous mixture in the right mixture range.

I started work in a coal mine 6 months after it blew up taking 14 blokes. A few of them I knew.

I saw the devastation it caused.

So it has been one of my priorities in my electrical career, and always at the back of my mind.

If you have old style fluoros with starters, they are an issue as well.

 

Cheers

 

Rob



#28 SHEEL

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Posted 08 October 2020 - 12:40 PM

just a crappy std light bulb, is that ok?



Still got the rear disc parts ?

nah they are long gone



#29 claysummers

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Posted 08 October 2020 - 08:03 PM

I’ve got the old style fluros with the ballast and starter bulbs. They are always on before I start painting.


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#30 Rockoz

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Posted 09 October 2020 - 10:56 AM

Normal light globes are kind of okay. Unless you smash them, then all bets are off.

A trick used by special soldiers was to prepare a light globe by drilling a hole in the base of it then half filling with metho or other flammable substance.

The target goes into the room and turns the light on. The metho keeps the filament cold enough to not blow and heats up the metho and its gas will enter the room. Once the metho is burnt off, there should be enough to create a bang when the filament becomes exposed and goes arcs out.

 

There are standards and legislation regarding electrical stuff in spray booths.

Its there for a reason and it is to save lives ultimately.

Given that though, I doubt that you would spray enough to get close to explosive ranges.

But then that also depends on how much circulation you are getting in relation to the amount of thinners in the air.

 

There are many though that have used non compliant equipment for years without an issue.

 

Cheers

 

Rob



#31 CI 0308

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Posted 09 October 2020 - 11:46 AM

If you aren't going the intrinsic safe path replace the batten with a couple of LED flouro replacment panels. Would be a much better light output for your shed anyhow.

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#32 claysummers

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Posted 09 October 2020 - 12:31 PM

Original comments were in relation to Epotec 408 I thought. 10% reducer only. It’s when I’m spraying top coat acrylic the riskiest as it’s 2:3 thinners and still as possible.


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#33 Rockoz

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Posted 10 October 2020 - 11:44 AM

Most flammables are most explosive around the 10% in air, and a range of 5 to 15%.

There are more exact figures around but that is a rough guide only.

You could also make it a bit safer by setting the fans to blow instead of suck.

That way they are in clear air.

From memory any electrics need to be 1.2 metres from the hazardous area with spray booths.

 

For those with LPG and nothing in relation to the post.

A 1kg bottle has huge potential.

Liquid LPG expands roughly 270 times in volume when it turns to gas.

So the roughly 1 litre of liquid turns into 270 litres of gas.

At a rough 10%, that gives you a volume of 2700 litres of bang.

A lot of toilets I have been in are about that size.

Thats a big lot of bang.

 

Cheers

 

Rob



#34 SHEEL

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Posted 11 October 2020 - 08:43 PM

I was making steady progress over the weekend but unfortunately ended on a bit of a frustrating job, but it happens I guess and I'm glad that I'm not settling for doing a half assed job.

Better to be fussy and get a better result in the end...

 

So I started yesterday by filling in a trim hole that won't be required, I've decided for now not to run the chrome trime around the bottom of the windows.

I took the passenger side window frams down to metal as I hadn't yet done that. then gave them a coat of etch primer.

 

I piled on yet another thick coat of high fill on the driver side rear panel and the boot lid.

 

The boot lid cam up sweet, the wet test shows some delicious straight reflections, I held a spirit level over the reflection so I could get a reference with a straight line. No wavy reflections - awesome.

 

The rear quarter was another story, it looks pretty good in the photo but the is a low spot towards the rear which I still couldn't level out with high fill, so I had to add some more filler. 

Adding filler after having most other panels blocked in high fill felt like a big step back. but I guess once I hit it with more high fill I should get a postive result next time. Just need to be patient.

 

I'm out of high fill so I need to figure out how I can get some more whilst in lockdown! My regular paint supply shop is outside the 5 k radius. I'll figure something out... 

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