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Old November 25th 04, 04:01 PM
Andrew Mawson
 
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Default Gas main pressure

Anyone know the pressure range to be expected in a low pressure gas main ie
the one presented to the govenor before it goes through the domestic meter ?
Obviously it will vary with demand in the area but what are the limits?

I know on the consumer side of the meter it should be 20-22 mBar on full
load but would be interested to know how much range the govenor has to work
on.

AWEM



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Old November 25th 04, 04:33 PM
tarquinlinbin
 
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On Thu, 25 Nov 2004 16:01:44 +0000 (UTC), "Andrew Mawson"
wrote:

Anyone know the pressure range to be expected in a low pressure gas main ie
the one presented to the govenor before it goes through the domestic meter ?
Obviously it will vary with demand in the area but what are the limits?

I know on the consumer side of the meter it should be 20-22 mBar on full
load but would be interested to know how much range the govenor has to work
on.

AWEM

The mains pressure could range from around 25Mb to around 39Mb
depending on area ,state of the local distribution network and demand.
Typically though its around the 30Mb mark give or take a couple of Mb,
Assuming that you have a standard low pressure supply and not a medium
or intermediate supply.

It cannot be assumed that the supply will be low pressure as it is
becoming increasingly common to supply premises using medium to low
pressure regulators. It would probably be obvious if you had one of
these though..

joe

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Old November 25th 04, 05:18 PM
Set Square
 
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In an earlier contribution to this discussion,
Andrew Mawson wrote:

Anyone know the pressure range to be expected in a low pressure gas
main ie the one presented to the govenor before it goes through the
domestic meter ? Obviously it will vary with demand in the area but
what are the limits?

I know on the consumer side of the meter it should be 20-22 mBar on
full load but would be interested to know how much range the govenor
has to work on.

AWEM


ISTR that in the days before new-fangled units like millibars were invented
duck, it came in at 20" H2O, and was governed down to 8". So, in round
figures, the input pressure was 50 mB.
--
Cheers,
Set Square
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