hi all testing gas at 20milbar I.e soundness test

[mooey]

Hi everyone I was working with a colleague today testing a bit of gas pipework and when he tested it after the let by at 10milbar he tested at 22milbar.i questioned him on it that I always do it at 20 and he said it would nt make any difference and in a way I agree if its gonna leak at 20 than its more likely to leak at 22milbar so why 20milbar?

 

[Ermintrude]

It's all to do with regulator lock out. Your tutor should explain

 

[mooey]

It's all to do with regulator lock out. Your tutor should explain

I thought It only locked out if you bought the gas in to quick and shut off the evc to quickly.even if it did lockout which it did nt it would nt effect the soundness test would it.

 

[kirkgas]

See even when the regs get changed to help people and allow TT at either 20 or 21 some choose to make up their own regs haha

 

[mooey]

See even when the regs get changed to help people and allow TT at either 20 or 21 some choose to make up their own regs haha

Yea right lol I always thought it was 20 but I could be wrong as I haven t done my acs since 2009 and that was what iwas taught

 

[Reg Man]

Why question the standards? Just do it. They are there for a reason.

 

[mooey]

QUOTE=Reg Man;707191]Why question the standards? Just do it. They are there for a reason.[/QUOTE]

If no one ever asked questions nothing would ever move forward.but I know where your coming from mate.

 

[armourer]

I was taught you test at 20 (I know its changed recently) to avoid governor lock out because if it does, during the tightness test your not testing between the governor and the ecv.

 

[kirkgas]

I thought It only locked out if you bought the gas in to quick and shut off the evc to quickly.even if it did lockout which it did nt it would nt effect the soundness test would it.

Yes it would effect the TT that's the whole point, if you lock the governor you won't test the inlet connection, anaconda or ECV connection, as an experiment connect u guage and then try to lock the governor, disconnect ECV and the gauge will stay at set pressure

 

[stevetheplumber]

ive always thought it strange that we test gas at working pressure and everything else at a multiple of working pressure i know its not much diffence but standing pressure on a meter is often higher than 20 so we actually test at below the level of normal use

 

[newcastle phill]

True but its just working to a standard.

 

[AlexGas]

True but its just working to a standard.

Defo! Rules are rules.
RED means ‘Stop’.
RED AND AMBER also means ‘Stop’. Do not pass through or start until GREEN shows.
GREEN means you may go on if the way is clear.

 

[mooey]

Yes it would effect the TT that's the whole point, if you lock the governor you won't test the inlet connection, anaconda or ECV connection, as an experiment connect u guage and then try to lock the governor, disconnect ECV and the gauge will stay at set pressure

yea i know what you mean but you would still be testing everything after the governor that what i was getting at is that right

 

[mooey]

Yes it would effect the TT that's the whole point, if you lock the governor you won't test the inlet connection, anaconda or ECV connection, as an experiment connect u guage and then try to lock the governor, disconnect ECV and the gauge will stay at set pressure

cheers kirk i get what your saying but you would still be testing after the governor

 

[kirkgas]

Not sure what you mean, as your test must include the outlet of ECV and the anaconda

 

[solutions]

ive always thought it strange that we test gas at working pressure and everything else at a multiple of working pressure i know its not much diffence but standing pressure on a meter is often higher than 20 so we actually test at below the level of normal use

That same thought has often crossed my mind. Afterall the regulator only really controls the upstream pressure when there is a flow of gas to an appliance. What about the middle of the night when the supplier is line packing the main?

 

[AWheating]

tbh a few milli up or down aint a great difference. but testing the whole installation is.

 

[mooey]

Not sure what you mean, as your test must include the outlet of ECV and the anaconda

okay forget how it should be. just say your there with your gauge your leting the gas flow through your gauge it is going up your around the 20 mil mark on your gauge and the govorner locks out, the pressure in your gauge is nt just gonna go down until you open something up.i.e pull your hose off the test nipple at the meter or you have a leak so theoreticly your testing everything after the govorner.

 

[kirkgas]

The govenor won't lock out if you increase the pressure to 20, it will only lock if you turn it on too high/fast causing it to lock out

 

[mooey]

The govenor won't lock out if you increase the pressure to 20, it will only lock if you turn it on too high/fast causing it to

I realise that. Your missing the point. say It locked out because I let to much pressure in to quick when it locked out my gauge was 20milbar the system would still hold the pressure put in as long as there was not a leak.so you would still be testing it.

 

[newcastle phill]

Yes but wouldnt you not be testing the anaconda etc then ??
And what if the only leak was situated there

 

[Dotty]

Part of this argument is making my teeth itch.

It's LOCK UP..... not lock out........

 

[newcastle phill]

Keep drinking that bottle'o'dog croppie and relax

 

[MC_Bob]

Even more so. The governor closes the path of gas as its reached pressure. Its not shut up shop and gone home.

 

[Ermintrude]

Part of this argument is making my teeth itch.

It's LOCK UP..... not lock out........

It's locking out the gas. Not up

 

[Dotty]

It's regulator lock up.

Or are you talking about the slam shut?

 

[tamz]

It's locking out the gas. Not up

Its UP on lp

Mp is OUT

 

[kris]

Lock Up,

 

[kris]

http://www.sgas.co.uk/wp-content/uploads/2010/06/Click-to-open-the-Gas-Dictionary.swf

Great little gas dictionary, lock out and lock up both there,

 

[solutions]

The govenor won't lock out if you increase the pressure to 20, it will only lock if you turn it on too high/fast causing it to

I realise that. Your missing the point. say It locked out because I let to much pressure in to quick when it locked out my gauge was 20milbar the system would still hold the pressure put in as long as there was not a leak.so you would still be testing it.

You would indeed still be testing the pipework, but importantly not all of it. As i am sure has been said a tightness test is required to test from the ecv forward including the annaconda and couplings prior to the regulator.
With the regulator locked out you are only testing from the regulator to the appliances not from the ecv to the appliances so not a proper or full tightness test.

 

[mooey]

You would indeed still be testing the pipework, but importantly not all of it. As i am sure has been said a tightness test is required to test from the ecv forward including the annaconda and couplings prior to the regulator.
With the regulator locked out you are only testing from the regulator to the appliances not from the ecv to the appliances so not a proper or full tightness test.

Hooray someone understands what im saying .
Got there in the end
Now eho does a tt when servicing

 

[Reg Man]

Can't believe this thread, its rudimentary in safe gas work.

 

[kirkgas]

Hooray someone understands what im saying .
Got there in the end
Now eho does a tt when servicing

Hooray indeed, now read back over the previous posts and see where we have been telling you that, but hey oh you got there in the end, that's the main thing

 

[newcastle phill]

Why I was thinking more elementary myself dear reg man