A little help regarding fire detection system...

[Knobhead]

This has been an interesting read.

Having only ever worked on kilns and furnaces, fire detection didn’t really figure in the scheme of things. Although some Muppet suggested we had them fitted. Could have been interesting.

 

[snowhead]

This has been an interesting read.

Having only ever worked on kilns and furnaces, fire detection didn’t really figure in the scheme of things. Although some Muppet suggested we had them fitted. Could have been interesting.

I can imagine some of the responses;

"FIRE",, Yes correct we've got plenty of it.

"Smoke,, somethings burning", Yes, you're not wrong there, usually comes with all the Fire we have.

 

[Guest77]

Gas valve also needs to be linked into the extraction system over the cookers, if the extraction is off then the gas won't operate.

I normally use the fire alarm to shut down all air handling plant, including the kitchen extract!. Which then shuts the gas down, saves on interfaces lol

Ah yes thats very true a fresh air fan needs to be running as well as extract as you mentioned, quite right.

 

[High Tower]

Ah yes thats very true a fresh air fan needs to be running as well as extract as you mentioned, quite right.

Good point mike!

We have to interlock extraction Canopies because of the gas regs, in complete madness the gas regs do not call for the intake to be interlocked too!, however like mike I use dual pressure switches and interlock both!!.

And all air handling is normally interfaced to the fire alarm normally on the roof or plant room

 

[High Tower]

This has been an interesting read.

Having only ever worked on kilns and furnaces, fire detection didn’t really figure in the scheme of things. Although some Muppet suggested we had them fitted. Could have been interesting.

I can just imagine some health and safety nob, standing with a standard smoke head in his had looking at a 40m ceiling above a ladle lol..........

In seriousness super aggressive environments like a foundry would have a fire risk assessment these days that would call for manual detection only and the need for automatic detection being negated with the exception of the office and public areas such as reception. So by modern day standards just manual call points dotted around on the foundry floor, protected with compliant covers and call points on every final exit.

It's not uncommon, we did a run of bus garages a few years back, L5 system, no automatic detection within the bus parking garage die to diesel smoke, just MCP's and sounders, and in the pit area, linear heat cable.

 

[tazz]

Quite common to use air sampling in bus depots, such as Vesda....the sensitivity and timing can be programmed over such a wide range.
But I think even air sampling couldn`t cope with furnaces ....

 

[Knobhead]

We did have detection systems. In the fuel storage and processing areas.

Coal can spontaneously combust. We had several fires in the storage bunkers where the only answer is to inject CO² or nitrogen in, water was a NoNo unless you wanted an explosion on your hands. A fire in one of the stock ground heaps took the best part of six months to put out.
The processed pulverised coal is highly explosive and was one of our biggest dangers. Just to add to the fun it would catch fire inside the mills. They were made to stand an internal explosion and had explosion doors that would blow off. Then the blanking gas would go in.

Natural gas, producer gas, diesel, coke and biomass just added to the fun and games.

It was all fairly safe once in the kiln, but I still managed to cause several explosions. Only got carted off to hospital once, a gas burner blew back in my face.

 

[tazz]

That`s interesting, especially the means of auto extingushing coal fire. Never come across furnaces before, only fuel storage, were we usually used flame detectors, to catch the early stages of ignited fuel or gas. Last flames detectors I used were terminal 5, deep down in the sumps under runway leading roads. Any fuel dump or spillage, ignited or not, is dowsed is protein foam as soon as control panel senses flame or air bound hydrocarbons. Was an interesting project.

 

[High Tower]

Best thing to ever happen to a crappy protek panel!!............

 

[tazz]

Best thing to ever happen to a crappy protek panel!!............

LOVE IT...LOVE IT....Now find a big skip to throw it in...!!

 

[ayjay]

illuminated fire sxit sighns too?

 

[High Tower]

LOVE IT...LOVE IT....Now find a big skip to throw it in...!!

They have to win an award for THE crappiest system............in the world, lol hateful things! Look like they were made in someone's shed!

 

[tazz]

They have to win an award for THE crappiest system............in the world, lol hateful things! Look like they were made in someone's shed!

Plus keeping the poor customer, in a closed contract for years.

 

[High Tower]

Mate can you explain to me why they thought they needed all of this crap to monitor one BMS panel???................

 

[tazz]

There is more relay ouput units, than the is inputs.....over engineer, plus a total mess...one addressable multi I/O would have done the job, very sad photo.