Been for a bubble bath and a pint of ap favourite?
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0.5mb drop on tightness test - Should I be worried?
- Thread starter EastMidsTiler
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View the thread, titled "0.5mb drop on tightness test - Should I be worried?" which is posted in UK Plumbers Forums on UK Plumbers Forums.
Been for a bubble bath and a pint of ap favourite?
Have you got a chuffin camera in my bathroom ?
I heard he was scrubbing your back?
your a brummie , totally understandable
cheers mr fields no disrespect intended just a northern thing
You dont need to do a TT on a service
What is the record number of posts on the subject of tightness testing in one thread?
Has this one won yet?
Has this one won yet?
I can't say I would be surprised. 😀
Agreed, there almost certainly isn't a leak, and none within the meaning of the regs. No system would be totally leak free - if you left it for a year the pressure would fall. As others have said, change of temperature could easily cause that sort of pressure change. A fall of about 0.15°C is all it needs for the pressure to fall by 0.5mb.
O
Old Account
You are funny as usual... how about air or N nitrogenium!?!?!
O
Old Account
How come, I come across quite often steel gas pipes which are either under the floor connected to copper or bedded in concrete? However, the point I made is to check for weaknesses and cracks which could be hidden due to slag or other debris.
S
Sharp Point
They use to use steel many moons ago and with threaded fittings. I guess with you mentioning slag, that the joints are welded over there?
not funny cant air test past 0.5 bar
you test at op and thats it
O
Old Account
Overkill ? Sorry mate but I disagree with that term. A gas pipe should be tested with a lot higher pressure than just 30mbar. You have to check the pipe under a load test which means with higher pressure than the one you will have when the pipe is in use. You will test the material and joints for weaknesses , hairline cracks or pinholes which are covered by slag. Due to the higher pressure you make sure to find those weaknesses or cracks which you won’t find by mbar.
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Old Account
Lol and then complaining when properties blow up what a rule.
so do you remove the boiler cooker and fires to do the test as these can only take 20 mbar
O
Old Account
I know that but we having a discussing about what is right and what is wrong. I personally have a different approach to checking and testing gaspipes.
JTplumbingservices
Gas Engineer
Unless you
But the pressure in the pipe is in mbar, we’re only talking about domestic installation pipework with a working pressure of 19-23 mbar and standing pressure usually a few mbar higher than that so why the need to test to 1 bar?
S
Sharp Point
Do you live in the U.K.?
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Old Account
Yes, you would need to otherwise you will ruin the appliances. You can only test them via there operating pressure as you know. But when it comes to testing the pipework throughout the property when installed new then you will need to use the appropriate fittings to cap them off and test them with higher pressure ( but that’s the way we do it in Germany ). We do 2 test before bedding pipes into the concrete, load testing ( 1bar with air or N ) for 30min -1hour and then a 15 min test leak test.
Sorry but it is difficult to explain german terms in English. I think you can’t be careful enough when it comes to gas. I know it’s done differently here and I do whatever is required but I would wish few things would be different.
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Sharp Point
If I can decipher his posts, I think the gas pipework in his home country is welded and welded joints can be terrible, so it makes sense to test at much higher pressure
O
Old Account
We have also 18-25mbar but when it comes to test pipework we have to undertake those tests and get that printed off with a special machine.
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