Emerson Process Management GmbH & Co. OHG 4-5
4
Maintenance
X-STREAM X2FD
Instruction Manual
HASXMDE-IM-EX
01/2015
4.1.2 Tests on Flame Arrestors
4.1 Verifi cations and Tests
The following procedure describes how to
perform a leak test with the fl ame arrestor
installed at the instrument.
Required tools
Manometer for max. 7.25 psi (500 mbar)
Stop valve
EXPLOSION HAZARD AND HAZARD FROM GASES !
Maintaining the FA shall be carried out considering all applicable safety
and legislative rules. Maintenance should be carried out by instructed and
trained personnel only!
Before opening gas paths they must be purged with safe air or neutral gas
(N
2
) to avoid hazards caused by toxic, fl ammable, explosive or harmful to
health sample gas components!
Maintenance is limited to performing visual
inspections, leak testing and pressure drop
tests on at least a regular basis. The time
interval has to be operator defi ned, conside-
ring operating conditions and composition of
supplied gases.
The fl ame arrestor is completely welded, no
inner parts are user accessible. Therefore
the fl ame arrestor has to be replaced by a
new one, if
- a fi re occurred on the fl ame arrestor
element
- the housing or the fi ttings show visible
mechanical damages
- contamination of inner elements is
detected (e.g. by pressure drop test)
-
the fl ame arrestor did not pass leak testing
4.1.2.1 Leak Testing
Procedure
Connect the manometer to the analyzer‘s
sample gas outlet to the fl ame arrestor´s
outlet fitting (disconnect external gas
lines).
Install the stop valve between gas inlet
fi tting and a Nitrogen (N
2
) supply.
Open the stop valve until the internal gas
path is under pressure of approx. 0.725
psi/50 mbar (corresponding to approx.
19.7 inch/500 mm water column)
Close the stop valve. After a short time
for the pressure to balance, the level must
not change over a time period of approx.
5 minutes!
When using a water fi lled u-tube
manometer prevent water from
entering backwards into the fl a-
me arrestor!
Don‘t exceed the maximum
pressure applicable to the ana-
lyzer as specifi ed in it´s instruc-
tion manual!
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