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  1. #16
    Join Date
    Dec 2018
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    NSW
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    586

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    Quote Originally Posted by racingtadpole View Post
    Stench gas is waaaaay old school.. we don’t carry canaries any more either…
    Technology has progressed a bit.
    The place I know running it is a gold / antimony mine that was first mined in the 1850's. Always teetering on the knife edge of profitability, this place probably prefers the old school for one reason or another.

  2. #17
    Join Date
    Aug 2011
    Location
    Melbourne
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    As mentioned above, mercaptan is toxic (according to MSDS) but certainly not in the concentrations used as an odourant in lpg.

    Our noses are so sensitive to this stuff. We have a multi gas analyser at work that we use for gas leaks etc. and there are instances where we have responded to a nat. Gas leak which you can smell, but it's such a small leak that it does not register on our LEL gas detector. It does on our VOC (volatile organic compounds) sensor but only because it measures in PPM and not % LEL

    As for labelling the vessel to show it does not contain LPG in case of fire, its neither here nor there.

    If your garage/shed is on fire, any pressure vessel represents a hazard to fire crews and as such they should all be treated the same anyway.

    Also I've been to many shed fires over the years, been privy to many fire investigations from fire, police and insurance companies and TBH they could care less about an LPG cylinder used as a compressor receiver. Half of them wouldn't even know anyway!

    Illegal wiring and/or criminal activities that lead to fires are what typically rouse interest.

    Lpg CYLINDERS are a great cheap source of material for many ace projects imo!

    Especially in this time of endless freakin lockdowns!

    Use one today!! Making An Upright Air Commpressor From An Old LPG Gas Bottle.

    Simon

    Sent from my SM-G970F using Tapatalk
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  3. #18
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

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    Quote Originally Posted by wm460 View Post
    I have a old air compressor that has a buggered capacitor that they threw out at work, and of course this hoarder took it home.
    I have that exact air compressor. It's a ripper, albeit a bit low on the CFMs. Any reason why you don't just replace the cap and keep the compressor as it is? It's already low on CFM. Why restrict even further with a smaller tank?
    Chris

  4. #19
    Join Date
    Oct 2014
    Location
    queensland
    Posts
    5

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    I have read on a few welding forum’s that bleach helps remove the mercaptan smell.

  5. #20
    Join Date
    Sep 2005
    Location
    Bendigo
    Age
    60
    Posts
    419

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    Charged from an air compressor for portable air.
    Never had a problem with any smell, was washed out multiple times with detergent and hot water and left out open in the hot sun.

    IMG_0367.jpg

  6. #21
    Join Date
    Dec 2018
    Location
    NSW
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    586

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    Quote Originally Posted by droog View Post
    Charged from an air compressor for portable air.
    You even retrofitted the fusible plug.
    Nice.

  7. #22
    Join Date
    Sep 2005
    Location
    Bendigo
    Age
    60
    Posts
    419

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    Quote Originally Posted by Commander_Keen View Post
    You even retrofitted the fusible plug.
    Nice.
    Actually no, just a brass plug. But may see if I can find one now that you mention it.
    Cylinder is normally stored with charge air valve open, and I am sure any fire crews would be more concerned with the other stored gas cylinders.

  8. #23
    Join Date
    Aug 2008
    Location
    Tennant Creek, Aust
    Age
    61
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    596

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    Quote Originally Posted by jack620 View Post
    I have that exact air compressor. It's a ripper, albeit a bit low on the CFMs. Any reason why you don't just replace the cap and keep the compressor as it is? It's already low on CFM. Why restrict even further with a smaller tank?

    I don't know what the tank is like in inside, when I bought it home and drained it, going by the amount of rusty water and sludge, draining wasn't done very regularly if at all.

    I am going to use a 45 kg cylinder.
    I want it upright because I am very limited for space.

    Ratty 05/2004 -05/07/2010 COOPER 01/08/1998-31/01/2012

  9. #24
    Join Date
    Aug 2011
    Location
    Melbourne
    Posts
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    Some time back I acquired a nice Clisby 12 series compressor that I tarted up.

    The reciever was a bit iffy so I washed it out with gravel to loosen up the scale and then to add "some" level of confidence I hydrostatically tested it by filling with water and pressurising with my pressure washer.

    Simon

    Sent from my SM-G970F using Tapatalk
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  10. #25
    Join Date
    Oct 2008
    Location
    N.W.Tasmania
    Posts
    1,407

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    Quote Originally Posted by BobL View Post
    Mercaptal is a sticky oil so the chances of it being dissolved into or by vinegar are small but it's worth a shot. Probably will need a lot of vinegar which then has to be removed before use or some may end up in al the lines and fittings.

    I have a 9L BBQ gas cylinder that I converted to portable pressure vessel about 10 years ago. It was filled with water and dish washing detergent and left in the sun for a day 7 times and the repeatedly filled with air every time I went into the shed for about 3 months but the air coming out of it still faintly stank.

    These days it mainly get used to blow clear the 3m long 20mm Black poly water drain waste line from the coffee machine to the sink water drain. I can no longer smell the mercaptan but SWMBO's bloodhound nose can and when I'm doing this she sometimes says "can you please not fart in the kitchen"
    Rather than vinegar, I would try using a strong alkali, caustic soda or sodium hydroxide more correctly should turn any oil into a water soluble soap which should rinse out with warm water. I doubt that the inside would be galvanised, but if it is then the sodium hydroxide will remove the zinc and produce some hydrogen, so be aware of that and you should be ok. Detergent for dishwashing machines might also be an alternative to sodium hydroxide, and perhaps a bit safer or more tolerant of ignorance and stupidity, but IMO sodium hydroxide has been used for centuries for cleaning drains, making soap and many other industrial as well as domestic purposes with very few ill effects providing basic precautions are taken, – rubber gloves, suitable eye protection, some clean water for flushing eyes or skin and perhaps vinegar for neutralising used solution etc. Those Clisby compressors are great and still being made and supported by the manufacturer in Adelaide, good luck with the project
    Last edited by Ropetangler; 3rd Sep 2021 at 03:53 PM. Reason: correct the spell checker!

  11. #26
    Join Date
    Feb 2013
    Location
    Laidley, SE Qld
    Posts
    1,038

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    I've had an air compressor with one of those Clisby twin cylinder pumps on it for nearly 35 years and its still going strong.

  12. #27
    Join Date
    Aug 2008
    Location
    Charlestown NSW
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    65
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    1,669

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    Quote Originally Posted by simonl View Post
    " and then to add "some" level of confidence I hydrostatically tested it by filling with water and pressurising with my pressure washer.
    How did you go controlling the rate of pressure increase?
    Another way is to fill with water and then put pressure on with a grease gun. Doesn't take much as long as there is not any air left inside.
    Peter

  13. #28
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    Aug 2011
    Location
    Melbourne
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    I have a petrol powered pressure washer. So I ran it at just above idle, so it still achieves the pressure but at a lower flow rate. This made it easier to control the flow to achieve the end test pressure.

    I then left it at test pressure for about 5 minutes to see if there were any leaks.

    Simon

    Sent from my SM-G970F using Tapatalk
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  14. #29
    Join Date
    Aug 2008
    Location
    Tennant Creek, Aust
    Age
    61
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    596

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    I tried to take the valve off but I can’t budge it so will have to leave it.
    I noticed that this is extremely easy to press down don’t know if this is normal or if it’s bugged.






    Sent from my iPhone using Tapatalk

    Ratty 05/2004 -05/07/2010 COOPER 01/08/1998-31/01/2012

  15. #30
    Join Date
    Apr 2018
    Location
    Perth
    Posts
    168

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    Is that the fill point for the cylinder, the ball moves inward to let liquid LPG in. Forklift cylinders and vehicle lpg cylinders have the same fitting.

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