Propane Tank Question?

[GolfVenture]

I was switching out my empty propane tank and again asked myself why the threads are reversed. Something that has puzzled me all my life.

 

As I was walking into the house to ask this questions a couple of thought came to me..

 

1) Because a Left handed person invented the propane tank?

 

2) Maybe the question I should be asking is why evrything else is threaded reversed.

 

Anyone knows?

[mega2500]

Your #2 is the answer so that nothing else but gas aproved hardware gets hooked to it,

 

most regulators, guages, ect that are for the gas world will have left hand threads

[msshearin]

Mega is correct sir, also all LP fittings that screw into it are made of brass to prevent sparks and nothing else will work in it.....

[GolfVenture]

Thanks a bunch. Now I can put that recurring question to bed.

[SilvrT]

Your #2 is the answer so that nothing else but gas aproved hardware gets hooked to it,

 

most regulators, guages, ect that are for the gas world will have left hand threads

 

Speaking about portable propane tanks ...

 

Not exactly true ... if the connection is on the inside thread of the tank valve, yes but other fittings that go onto the outside thread are right threaded.

 

What the reasoning there is, I don't know.

[Flyinfool]

Speaking about portable propane tanks ...

 

Not exactly true ... if the connection is on the inside thread of the tank valve, yes but other fittings that go onto the outside thread are right threaded.

 

What the reasoning there is, I don't know.

 

IIRC which don't always happen at my age.......

 

The inside thread is a standard machine thread, this would allow a lot of different things to screw in there. The Left hand thread drastically limits this.

Bottles of other non fuel compressed gases use the same thread but in a right hand version. This prevents you from using a low pressure regulator that is made for fuel gases on a high pressure gas cylinder. Most fuel gases are at 400psi or less, the high pressure non fuel gases are up to 2500psi. Your fuel gas regulator would not handle this pressure, this is why they need a different thread.

The outside thread is specific to fuel gas tanks and not used for anything else at all so there is no danger of connecting something else and they can be a right hand thread for us mere mortals that have trouble unscrewing a LH thread.

[dacheedah]

prevents stupid

[Flyinfool]

prevents stupid

 

You said the same thing I just but with so many fewer words.........

[KIC]

Thanks for answering that so Brian can FOCUS on getting his bike back on the road.... Geez talk about rabbit trails.....

 

[GolfVenture]

Thanks for answering that so Brian can FOCUS on getting his bike back on the road.... Geez talk about rabbit trails.....

 

 

Ya and I have a lot of those rabbit trails. I finally did get my K&N air filter. My family hid the package from me as a deterent from me getting my 89 VR ready.

 

Well I hope to get her back together next week and put new gas and fire her up. Oh please run an all 4 cyclinders.

[XV1100SE]

Geez... the things you learn on this forum ! Now I know why the thread on propane tanks are the way they are and to change all tires on an AWD vehicle at the same time !

 

One day someone is going to ask the meaning of life and someone on the forum will have the answer ! (other than Monty Python's version)

[Miles]

Geez... the things you learn on this forum ! One day someone is going to ask the meaning of life and someone on the forum will have the answer !

 

 

Was that a rhetorical question, or...did you want an answer to that ?

 

[SilvrT]

Was that a rhetorical question, or...did you want an answer to that ?

 

 

Maybe he doesn't but I do so fire away (coz I figure if anyone can answer that, you can)

[Black Owl]

prevents stupid

 

Wanna bet?

 

I never cease to be amazed at how hard some folks work to prove that stupid is alive and well....:rotfl:

 

[Flyinfool]

Idiot proof has never been achieved, The best you can hope for is idiot resistant.

 

They just keep making bigger and better idiots.......

[dacheedah]

Is someone converting their rsv 2 a propane bike

[creole]

Concerning left handed fuel gas threads.......You can also tell (on the internally threaded valve connections) which ones are left handed because the wrench flats that you use to unscrew the fitting have a ring cut into them. If you see these, then you should automatically think ......Lefty hand thread.

I've seen people work at unscrewing these connections to the point of chewing the whole thing up with a pipe wrench to no avail......because they were tightening them the whole time.

[Marcarl]

Reminds me of the old Dodges, back in the forties and early 50ies, the left hand wheels had left hand threads on the wheel lug nuts,,,,, now why was that?

[dacheedah]

Reminds me of the old Dodges, back in the forties and early 50ies, the left hand wheels had left hand threads on the wheel lug nuts,,,,, now why was that?

 

I had a 1950 Studebaker Champion, it was left hand thread on the left side. Fun changing tires . . .

[Trader]

Reminds me of the old Dodges, back in the forties and early 50ies, the left hand wheels had left hand threads on the wheel lug nuts,,,,, now why was that?

 

My first thought was so it tightens as the wheel turns, which of course is clockwise on the right (right hand threads) and counter-clockwise on the left (left hand threads)

 

Now, as I was patting myself on the back for such a brilliant answer, I realized that theory would be correct if there was only one center nut....but not when there are 4-5 lug nuts.

 

 

:think::think:

[SilvrT]

Reminds me of the old Dodges, back in the forties and early 50ies, the left hand wheels had left hand threads on the wheel lug nuts,,,,, now why was that?

 

Actually, that continued on into the 60's and I think even the 70's

 

It had to do with the left wheel spinning off from not being tightened properly on those vehicles not using a left thread.