How often do you change lpg/butane piping on your boat?

I changed the copper pipe after 20 something years. It looked ok on the pipe I could see, but when it came out, the side nearest the boat was deeply corroded, and not long for this world. Lucky to have changed it when I did (was picked up on an insurance survey).
 
Brilliant idea to save a quid or so !

The expiry date is printed on hose as previously mentioned, get new hose regularly - if a couple of jubilee clips are beyond you, you shouldn't be allowed out of the attic let alone running a boat with gas aboard :)

It is the date of manufacture that is printed on the hose.

Recommendations for the service life vary. Some say 5 years others say 3 years. Some say its from the date of manufacture others say its from first use.

( worm drive clips BTW are not acceptable on high pressure hoses
 
It is the date of manufacture that is printed on the hose.

Recommendations for the service life vary. Some say 5 years others say 3 years. Some say its from the date of manufacture others say its from first use.

Interesting as my GOK orange fittings haven’t been made yet!!!:)

I have no doubt that some hoses have the date of manufacture on them but my hoses were ordered, and came with, expiry dates on attached labels which are all too easy to read...
 
the copper pipe on my boat is from 1988 and encapsulated by jeanneau around the hull inside the cabins to the gas locker. was tested leak free by the marine gas fitter im using so just changed the flexible from the copper to stove and cylinder
 
Test the orange hose by bending is over. Any sign of perishing then replace it.
If a hose is not exposed to daylight it could last decades.
When I replaced my 20 year old orange hose tails I cleaned up the old ones with stainless wire wool to inspect them. They came up like new (all date markings rubbed off) and no sign of cracking in kink when folded double.
Conclusion - environment is everything.
 
Interesting as my GOK orange fittings haven’t been made yet!!!:)

I have no doubt that some hoses have the date of manufacture on them but my hoses were ordered, and came with, expiry dates on attached labels which are all too easy to read...

Well if you ordered hoses with expiry date labels attached you'd expect the date on the labels to be the expiry date. Otherwise LPG hose manufactured to the British standard should have the standard number the class and the date of manufacture all printed on it.

Worth noting perhaps that the 2014 European standard now includes Class 3 for propane because the old class 2 was judged to be unsuitable for high pressure propane. Not yet incorporated into the British standards AFAIK.

Out of interest how many years life did GOK give your hoses?
 
When I replaced my 20 year old orange hose tails I cleaned up the old ones with stainless wire wool to inspect them. They came up like new (all date markings rubbed off) and no sign of cracking in kink when folded double.
Conclusion - environment is everything.

Be warned though that when I tried to use ( as a temporary measure) some that was old but unused and stored in a cool dry place it split lengthwise despite showing no signs of deterioration when flexed.
 
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