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Old 02-01-2006, 12:28 PM   #3
Uziel Gal
Legend
 
Join Date: Mar 2003
Location: Chingford, London, UK
Copied from PBNation.

For those who don't recognise the name, Trevor Kent is a partner in what is probably the UKs largest hydrotesting and HP filling facilities: -

A statement form Mr. Trevor Kent form H-Pac concerning an incident at the the Millennium event in Madrid, today the 2nd June 2006.

At approximately 3pm there was an incident where a cylinder being filled exploded. After a thorough investigation and examination of the cylinder / regulator and also evidence found on the fill station, it was decided that a player had sprayed a general purpose lubricant (3 in 1 oil, found close by) into the fill nipple and then commenced to fill the cylinder.
This obviously ignited inside the cylinder under pressure which caused the reg to melt and the cylinder to fly into the staging area causing some injuries believed to be minor.

The reason for this accident was because the player used an incorrect method for repairing a fault with the fill nipple/ reg and thus endangered their own and other people's safety.
H-Pac would like to make it absolutely clear that the entire fault for this incident lay with the improper filling and maintenance of this cylinder.
The player in question has not come forward and remains anonymous for reasons which seem obvious.

Compressed air is dangerous if misused and if you have any problems, you should immediately consult the manufacturer.
Never attempt to repair these cylinder reg units by yourself; you should always consult the correct technicians or manufactures.

Trevor Kent
H-Pac


Now, after you have read this you all need a refresher course with oil and chemicals in or

around your air system. DO NOT ! I SAY AGAIN DO NOT!!! ADD DROPS OF OIL OR USE ANY

OIL TO SERVICE YOUR AIR SYSTEMS TO KEEP THE FILL NIPPLE FROM LEAKING. I will report

that 3 times now the fill operator at my old field has had 3 flash explosions. The last one

occurred with an aog member’s tank. I will not release his name as I will explain a little more

in a second. The last flash back actually burnt my partner’s arms and the flash was doused

with water to put out the flames. That’s correct, the flames. The resulting flash back actually

melted the redz tank cover right to the tank and john’s arms were burnt and the hair was

completely removed from his gorilla like arms. This is bull§§§§ and it doesn’t need to happen. A

while ago I posted a mini tech scenario about what happens when you add oil or grease that

is not explosion proof. After I posted this an industry insurance provider asked me not to

make a "big" deal" about it. Well guess what? I don’t want to die or anyone else to because

of lack of knowledge about this situation.

Now back to what happened with the last flash back. The customer had a leaky fill nipple;

the person who serviced the tank did put oil into the fill nipple. After the tank was filled the

pressure release when removing the fill nipple flashed the oil that had migrated to the area

around the fitting. This flash back turned the regulator black with soot and the cover melted

to the air tank. Here’s where it gets way way way worse. the customer then took the tank

back, cleaned the soot off the reg and remainder of the cover and cleaned the fill nipple

with an spray cleaner used to clean automobile carbs.i have now advised my partner to

change the whole way we now fill hp tanks and goes as follows. When a player comes in for

a fill there are no more "top offs" every tank is now drained and a c/a adapter is screwed

onto the bottle to drain the tank. Then a "purge" is done then a fill will be continued. We are

actually looking into a "blast box" or a ballistic blanket like they use on drag cars to keep the

pressure plate/fly wheel from exploding into the driver’s compartment to put the tank in during the fill. Guys please pay

attention to this warning. You most likely won’t be the one that the explosion happens to,

it’s the poor sob that is filling your tank. I am awaiting a real tank explosion video to post on line

so you can see how serious this situation really is.

REPRINTED WITHOUT PERMISSION FROM WAR PIG DATED 2002.


Don't Blow Yourself Up
August 2002
Oil and compressed air do not, and should not be mixed. Many people have taken to the practice of dropping paint gun oil into the fill nipple of their compressed air system, especially in the hopes of sealing a leaky fill nipple.

While this would not be a real problem using the inert gas nitrogen, most "nitrogen" systems in paintball are actually filled with compressed air. As air is compressed the amount of oxygen (as well as the other gasses in the air) is increased. Fire, also known as combustion, or an exothermic oxidation reaction requires three things to start: oxygen, fuel and heat. The temperature needed to start a particular fuel burning is known as that fuel's flash point. As the amount of oxygen a fuel is exposed to increases, the flash point drops. With some materials like phosphorus, the flash point is below room temperature, and they will catch fire when exposed to air.

There are many oils which are perfectly safe at room temperature and air pressure. However, when the oxygen content around them increases - as with air compressed into a paint gun’s HPA tank, the flash point can lower to below the temperature of the fill air and cause the oil to ignite. This is the principle at work in the cylinders of a diesel engine.

In a recent telephone interview with WARPIG.com, Shawn Townsend of Compressed Air Specialties, Inc., a Bauer Compressor distributor in Southern California, related a warning against using oils in HPA tanks and the story of an accident that occurred at SC Village.

According to Townsend, a customer at the field experienced a leak in the fill nipple of his air system and treated it with a few drops of paint gun oil dropped into the nipple before taking his gear to the air fill station. The player started to fill his tank and dropped it, shouting. Townsend says he stepped over to investigate and smelled the after effects of a fire, and found the fill hose and fill nipple coated in a black film.

Townsend theorized that the fill nipple would have sprayed the oil into a mist, much like the fuel injector in an automobile engine, further increasing the surface area in contact with oxygen and lowering the flash point.

Townsend said that the resulting fire flashed through the tank and the hose. Fortunately the explosion was small, and did not create any shrapnel, so no one was injured. Townsend ended up taking the fill hose out of service, and recommended that the customer have the tank both visually inspected and hydrostatically tested by a DOT certified inspector before filling it again.

Paintball safety lies in the hands of the players. Do not put oil or any other lubricants into your compressed air system's tank or fill nipple. No lubricants should be used on the regulator unless they are explicitly recommended by the manufacturer.
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Last edited by Uziel Gal : 03-27-2007 at 06:59 AM.
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