refillable bottles lifespan (1 Viewer)

[EX51SSS]

This is one of the reasons for my cynicism:

https://en.m.wikipedia.org/wiki/Council_for_Registered_Gas_Installers

Basically, plumbers!
So in essence, why not bring this up under gas central heating in houses?
Plus, it's in Wikipedia so it must be true. Daily Mail anyone????

 

[Minxy]

The only thing going on in this thread is that some are 'gassing' and 'testing' other funster's knowledge!

Calm down boys ... next you'll be telling us they use a Rolex to time how long it takes to do the leak test!!!

 

[Bart]

Does anyone know what pressure is in a filled lpg tank? Or does it vary by temperature

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[tonyidle]

Does anyone know what pressure is in a filled lpg tank? Or does it vary by temperature

Here you are:

https://www.engineeringtoolbox.com/propane-butane-mix-d_1043.html

 

[tonyidle]

The only thing going on in this thread is that some are 'gassing' and 'testing' other funster's knowledge!

Calm down boys ... next you'll be telling us they use a Rolex to time how long it takes to do the leak test!!!

Stop with this voice of reason stuff - makes you sound female .

 

[EX51SSS]

Does anyone know what pressure is in a filled lpg tank? Or does it vary by temperature

Would it be of use knowing that? It is relatively low on comparison to other packaged gas as the cylinder is designed for low pressure as opposed to higher pressure cylinders that are made completely differently by design.

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[mike mcglynn]

Where I store my van is right next door to an LPG filling plant and they have a testing facility and I can tell you that the amount of failed bottles is enormous judging by the size of the scrapped bottles stack and it would seem to me that the size that is failing most is the ones we all use in our lockers .

 

[tonyidle]

Where I store my van is right next door to an LPG filling plant and they have a testing facility and I can tell you that the amount of failed bottles is enormous judging by the size of the scrapped bottles stack and it would seem to me that the size that is failing most is the ones we all use in our lockers .

It would be interesting to know the most common reason for failure. When l used bottles the ones l returned without using were either leaking through the valve when turned off (only one) or had a damaged regulator connection (a few). How do they test?

 

[mike mcglynn]

It would be interesting to know the most common reason for failure. When l used bottles the ones l returned without using were either leaking through the valve when turned off (only one) or had a damaged regulator connection (a few). How do they test?

Hi, Tony I don't know for sure but they have a large Nitrogen tank on site so I presume pressure test .

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[EX51SSS]

Hi, Tony I don't know for sure but they have a large Nitrogen tank on site so I presume pressure test .

I suspect that they use nitrogen to test because of the molecular structure.

 

[mfw]

It would be interesting to know the most common reason for failure. When l used bottles the ones l returned without using were either leaking through the valve when turned off (only one) or had a damaged regulator connection (a few). How do they test?

Think they also check valve thread that screws into bottle itself as well incase there is wear on the thread that certainly gets checked on hp bottles/cylinders

 

[EX51SSS]

As regards the 10 yearly refurbishment programme with gas suppliers, the head is removed (valve etc), the cylinder is then pressure tested to around 40% higher than required, repainted and new head fitted, so in essence it appears to be a brand new cylinder.

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[tonyidle]

As regards the 10 yearly refurbishment programme with gas suppliers, the head is removed (valve etc), the cylinder is then pressure tested to around 40% higher than required, repainted and new head fitted, so in essence it appears to be a brand new cylinder.

I remember reading about hydraulic testing when l put together a workshop compressor. The test was looking for excessive distortion of the compressor receiver under a much higher than normal internal pressure. I can't remember what pressure was used but l remember thinking it was a good job it was hydraulic. As an aside i have a friend who has made a fair number of two-stroke expansion chambers using hydraulic pressure to inflate them from flat form. They're made from 1mm mild steel and at 700psi they are fully formed and can be hammer-dressed as though they were solid steel.

 

[mfw]

Doesn't look like there is an answer to my original question apart from you can buy refurbished which probably doesn't need exchange bottle

On ebay at moment there is a pair of gaslow cylinders 15year ones with 18 months life left a regulator and rubber hoses that probably need replacing which have been bid up to £84 at moment so it is probably more cost effective to sell on ebay and just replace with new ones before expiry date that may be answer to my question