1220-04-05-.26
Utility Inspections And Tests
Cite as Tenn. Comp. R. & Regs. 1220-04-05-.26
(1)
Each utility shall make inspections and tests of meters and associated metering devices as
follows:
(a)
Pre-installation Inspections and Tests
Every meter and/or associated metering devices shall be inspected, tested, and sealed
before being placed in service, and the accuracy of each meter shall be within the
tolerances permitted by Rule 1220-04-05-.27.
(b)
As Found Tests
All meters and/or associated metering devices shall be tested after they are removed
from service. Such tests shall be made before the meters and/or associated metering
devices are adjusted, repaired, or retired.
(c)
Leak Tests
Repaired meters, and meters that have been removed from service, shall be leak
tested prior to installation. New meters shall be leak tested in accordance with a
sampling method acceptable to the Commission. Each meter tested shall be subjected
to an internal pressure of at least twenty (20) inches W.C. and checked for the
presence of leaks by one of the following tests:
1.
Immersion test.
REGULATIONS FOR GAS COMPANIES
CHAPTER 1220-04-05
2.
Soap test.
3.
Pressure drop test of a type acceptable to the Commission.
(d)
Request Tests
Upon request by a customer and accompanied by a payment of five dollars ($5), the
utility shall make a test of the meter serving him, provided that such tests need not be
made more frequently than once in eighteen (18) months.
1.
The customer, or his/her representative, may be present when his/her meter is
tested.
2.
A report of the results of the test shall be made to the customer within a
reasonable time after the completion of the test, and a record of the report,
together with a complete record of each test, shall be kept on file at the office of
the utility.
(e)
Periodic Tests
Unless otherwise authorized by the Commission each utility shall make periodic tests of
meters, associated devices and instruments, to assure their accuracy. Such tests shall
be scheduled within the calendar year, or earlier, when the interval shall not be longer
than provided for in the following schedule where applicable. (Note: Maintenance
programs suggested by manufacturers of the following meters and devices should be
carefully followed.)
1.
Positive displacement meters
(i)
Up to 250 c.f. / hr………………………………………………….…..10 years
(ii)
250 c.f. / hr. ………………………………………..……………………7 years
2.
Orifice meters …………………….……………………………………..…...6 months
(i)
Plates and Tubes ………………………………………………….……2 years
3.
Base pressure correcting devices ………………………………………..… 2 years
4.
Base volume correcting devices ……………………………………………....2 years
5.
Secondary standards
(i)
Test bottles, one cubic foot …………………………………...………10 years
(ii)
Dead weight testers ……………………………………..6 months–minimum
6.
Working standards
(i)
Bell provers……………………………………………………….…..…..3 years
(ii)
Rotary displacement test meters …………………………….…..…..5 years
(iii)
Flow provers ………………………………………………………..……5 years
REGULATIONS FOR GAS COMPANIES
CHAPTER 1220-04-05
(iv)
Laboratory quality indicating pressure gauges ………………..….6 months
(v)
Temperature recorders …………………………………………..…..6 months
(vi)
Gravitometers ………………………………………………….………6 months