In message , tony sayer
writes
In article , Jethro_uk
scribeth thus
On Mon, 16 Sep 2013 19:04:41 +0100, polygonum wrote:


My experiences of gas leaks over the past five to ten years suggests to
me that they have absolutely no idea where a huge proportion of gas
goes. They might know to the kilowatt hour exactly how much they push
down the pipes - and then they lose track of it.

When I worked for British Gas "Central Control", we'd vent cubic
*kilometres* of gas from offtakes when undertaking pigging runs. The CAA
had to be informed, as planes flying overhead could conceivably crash ...

What's a "pigging run" please?...

Guessing.. pipeline internal inspection by *pig*.


--
Tim Lamb