[vatossan]

from now on im not fixing my A/C

[fattubbashit]

A good Indian is a dead Indian.

Fucking selfish arrogant pigs.

More air for me

[Karma]

Great post. Thank you.

[icehole]

Originally Posted by William May ↗

I suspect the freon was serviced sometime in the past with propane, hexane, or natural gas.
There are a lot of "Quick-Cool" kits that use this to rejuvenate auto air conditioners. People don't realize they are making their air conditioner into an explosive bomb. These guys were probably set up by some prior worker doing a crap job. When they started working on the system, it detonated.

Will it be any cheaper than a regular freon?

[William May]

Originally Posted by icehole ↗

Will it be any cheaper than a regular freon?

Yes, because those materials cost about 5% of what real freon costs. They function as a refrigerant just as well, with most of the characteristics. The only drawback is they ARE flammable, which Freons as a class are not. In fact, some aircraft extinguisher systems still use Freons as an extinguishing agent, because they work so well. I assume their use is permitted due to their effectiveness and lack of damage to aircraft equipment. The FAA is the SOLE determinant of regulations that are applied to aircraft, and they feel that there is nothing that works as well or that is as safe from an aviation perspective, so most aircraft extinguishing systems use some form of Freon as their gas agent. There is NO agency that has superior power to the FAA, so their rules are the RULES.
Same with asbestos. There are many areas in aircraft where asbestos is STILL used, because it is the lightest and most effective form of fire deflection. Although they are changing from asbestos to such materials as Fibre-Fraxe, which is an asbestos replacement.
There are still many gaskets and wiring protection sleeves that have asbestos in their construction. No one I ever knew was concerned very much by this. We knew what items contained asbestos, and we followed the procedures for their use. Asbestos is really NOT dangerous, unless you scrape or grind on it and then inhale it. Just being around it does not affect you.
The standards for replacement are that the material must be AS GOOD OR BETTER THAN the original material, and most materials are NOT. If they fail the standards tests of the FAA, then they will NEVER be approved.

Most airliners use depleted uranium in the flight controls. They do this because they needed a VERY high density material that weighs more than lead. Depleted uranium is stable, it is used in areas where people are not around, and it is much denser and heavier than lead. Every Boeing aircraft I ever worked on had depleted uranium as flight control weights. Same with Airbus, and I assume all the Soviet and Chinese aircraft use it as well.
There is no substitute for these materials.

There are some videos on DR here, of cars that had under-hood explosions and fires after frontal accidents. I cannot say for certain, but I assume these accidents had cars with air conditioning systems that were filled with mixed propane/hexane as part of their freon load. There really is nothing else under an automotive hood that will explode. Typical cars don't have enough gasoline within the engine compartment to make any sizeable fire. They DO have fires when a gasoline line is torn or fractured, and the fuel pump in the fuel tank does not shut off, thus they have an engine fire. But if you see a big bang, it's NOT gasoline. It's diddled air conditioning systems that have their freon systems contaminated with these other gases.

[BiteNite]

Originally Posted by BiothDaSloth ↗

Indians can't have electricity or A/C apparently. It is not Vishnu's will

they can have electricity, but Vishnu must take sacrificial victims every week.

[icehole]

Originally Posted by William May ↗

Yes, because those materials cost about 5% of what real freon costs. They function as a refrigerant just as well, with most of the characteristics. The only drawback is they ARE flammable, which Freons as a class are not. In fact, some aircraft extinguisher systems still use Freons as an extinguishing agent, because they work so well. I assume their use is permitted due to their effectiveness and lack of damage to aircraft equipment. The FAA is the SOLE determinant of regulations that are applied to aircraft, and they feel that there is nothing that works as well or that is as safe from an aviation perspective, so most aircraft extinguishing systems use some form of Freon as their gas agent. There is NO agency that has superior power to the FAA, so their rules are the RULES.
Same with asbestos. There are many areas in aircraft where asbestos is STILL used, because it is the lightest and most effective form of fire deflection. Although they are changing from asbestos to such materials as Fibre-Fraxe, which is an asbestos replacement.
There are still many gaskets and wiring protection sleeves that have asbestos in their construction. No one I ever knew was concerned very much by this. We knew what items contained asbestos, and we followed the procedures for their use. Asbestos is really NOT dangerous, unless you scrape or grind on it and then inhale it. Just being around it does not affect you.
The standards for replacement are that the material must be AS GOOD OR BETTER THAN the original material, and most materials are NOT. If they fail the standards tests of the FAA, then they will NEVER be approved.

Most airliners use depleted uranium in the flight controls. They do this because they needed a VERY high density material that weighs more than lead. Depleted uranium is stable, it is used in areas where people are not around, and it is much denser and heavier than lead. Every Boeing aircraft I ever worked on had depleted uranium as flight control weights. Same with Airbus, and I assume all the Soviet and Chinese aircraft use it as well.
There is no substitute for these materials.

There are some videos on DR here, of cars that had under-hood explosions and fires after frontal accidents. I cannot say for certain, but I assume these accidents had cars with air conditioning systems that were filled with mixed propane/hexane as part of their freon load. There really is nothing else under an automotive hood that will explode. Typical cars don't have enough gasoline within the engine compartment to make any sizeable fire. They DO have fires when a gasoline line is torn or fractured, and the fuel pump in the fuel tank does not shut off, thus they have an engine fire. But if you see a big bang, it's NOT gasoline. It's diddled air conditioning systems that have their freon systems contaminated with these other gases.

Yes, the problem with hazardous materials is that not everybody can't handle them. Even dangerous when the next person to repair the utility didn't even know what was used in it, like in this case.

Thanks for the thorough explanation, man
Really changes my perspective on accidents

[HiBypass]

Originally Posted by William May ↗

I suspect the freon was serviced sometime in the past with propane, hexane, or natural gas.
There are a lot of "Quick-Cool" kits that use this to rejuvenate auto air conditioners. People don't realize they are making their air conditioner into an explosive bomb. These guys were probably set up by some prior worker doing a crap job. When they started working on the system, it detonated.

i was wondering how this could've happened. in my experience even the high side of an a/c system doesn't make enough pressure to do all that. nor is r134a or 410 flammable

[William May]

Originally Posted by HiBypass ↗

i was wondering how this could've happened. in my experience even the high side of an a/c system doesn't make enough pressure to do all that. nor is r134a or 410 flammable

The "Quick-Cool" kits for a fast service of your freon system frequently have propane and hexane added. This was far more common with R-12 refrigerant, because it was so expensive. F-134a is cheap ($11 a can at Walmart) I have not seen it with R134 systems. This was a big problem years ago. They may have changed the regs in the U.S. so you have to sell pure refrigerant now, but when it was going on, 30% of the refrigerant in most quick charge kits was made of propane or hexane.