Hi, first time poster here and hoping for some help.
I work on sites across the UK with different non-domestic gas setups, I never have to deal with anything upstream of our particular equipment so no meters etc. Tightness testing involves just the pipework on our equipment which in total is usually around 2 metres of 2" tube. Isolation valve is present for isolating it from the main.
Now, usually we have mains supply pressure around 21mbar, but there are some outliers that need to use gas boosters because of flow problems. The pressures vary, but the highest I have seen is 80mbar. This pressure is only present when our equipment is started, it triggers the booster. It goes straight to the gas valves so in effect the whole system is at this 80mbar pressure, no reducers.
Where I'm unsure is what tightness test to apply. Normally we would use IGEM/UP/1B, but in the booster example our OP is 80mbar so we can't use that. IGE/UP/1A only goes up to <40mbar on OP so that is out as well. As far as I can tell 1C is just for meter installs and not for downstream.
I queried this with my office and got the "everyone before you did it this way" response but I just want to check. Any ideas?
I work on sites across the UK with different non-domestic gas setups, I never have to deal with anything upstream of our particular equipment so no meters etc. Tightness testing involves just the pipework on our equipment which in total is usually around 2 metres of 2" tube. Isolation valve is present for isolating it from the main.
Now, usually we have mains supply pressure around 21mbar, but there are some outliers that need to use gas boosters because of flow problems. The pressures vary, but the highest I have seen is 80mbar. This pressure is only present when our equipment is started, it triggers the booster. It goes straight to the gas valves so in effect the whole system is at this 80mbar pressure, no reducers.
Where I'm unsure is what tightness test to apply. Normally we would use IGEM/UP/1B, but in the booster example our OP is 80mbar so we can't use that. IGE/UP/1A only goes up to <40mbar on OP so that is out as well. As far as I can tell 1C is just for meter installs and not for downstream.
I queried this with my office and got the "everyone before you did it this way" response but I just want to check. Any ideas?