DIYbanter - View Single Post

On 2006-02-06, wrote:

Capped ends seal better than valves. You might get some miniscual
leak through a ball valve which would cause the pressure to drop
over the duration of the test. Capping the valves avoids the
possiblity of getting a false fail.

Thanks for the response. It seems like it would be fine to test with
shutoff valves in place, the valves turned off, and the downstream end
of the valves open. Then if there is a slow leak, first check the
valves by plugging their downstream ends.

The operating pressure and test pressure of natural gas are so low
that you will never break a valve or pipe from overpressure.

Yet I understand the test pressure can damage the meter. So is a 600
psi WOG ball valve just after the meter sufficient to safely isolate
the meter?

Cheers, Wayne