FTS004 Deep Fat Fryers
FTS004 Deep Fat Fryers
FTS004 Deep Fat Fryers
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Product KAU/SPU
18 Apr 2002
Fire test summary HI-FOG systems for protection of deep fat fryers.
Test standard
ISO 15371:2000 Ships and marine technology - Fire-extinguishing systems for protection of
galley deep-fat cooking equipment Fire tests
Summary
Twelve fire tests were conducted to evaluate the fire extinguishing capability of two different
HI-FOG systems for the fire protection of galley deep fat fryers. Both configurations, the selfcontained accumulator system and the pumped system, quickly extinguished the fires
without causing any splashing of oil, and hence met all the fire performance requirements of
the test standard.
Conclusions
The HI-FOG fire extinguishing systems, with the installation criteria below, were shown to
comply with the fire performance requirements set out in the ISO 15371 for fire-fighting
equipment for galley deep fat fryers.
Spray head OR
Sprinkler
1.35 m
Marioff Corporation Oy reserves the right to revise and improve its products and recommended system configurations as it deems necessary without notification. The information contained herein is
intended to describe the state of Hi-fog products and system configurations at the time of its publication and may not reflect the product and/or system configurations at all times in the future.
HI-FOG
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1. Introduction
International Maritime Organisation (IMO) requires that galley deep fat cooking equipment on ships complying
with the SOLAS convention must be protected by a fire extinguishing system. The system requirements are specified
in MSC/Circ.800 that contains a draft new paragraph 9 to be added in SOLAS II-2/18. The fire-extinguishing systems
must be tested to an appropriate standard, like the ISO 15371. Systems meeting the requirements of this standard
are also suitable for protection of similar fryers in land-based installations.
Twelve fire extinguishing tests in accordance with ISO 15371 were conducted for two HI-FOG systems: for a selfcontained accumulator system and for a pumped system that may be a part of a larger fire protection system onboard
a ship.
2. Test arrangement
The tests were carried out in gesta, Sweden,
at a training facility of the Stockholm Fire Brigade.
The deep fat fryer used in the tests was representative of those encountered in shipboard
galley areas. The test fryer had two separate
vats about 4cm apart, each having a 240 mm
x 370 mm cooking surface area and a depth of
250mm. One vat was filled with oil in each test;
the other vat was filled with water up to the
same level. Figure 1 shows the test arrangement for an accumulator system.
Three tests were conducted for each system
as required by the standard:
- two extinguishing tests (at min and max nozzle distances, minimum discharge rate condition)
- one splash test (at the minimum nozzle distance, maximum discharge rate condition).
In total, four sets of tests were conducted. Prior
to each test, the fryer was cleaned and filled
with fresh oil. The oil was heated up to 363C
by which point it caught fire due to auto-ignition.
In the extinguishing tests, the ignited oil was
allowed to burn freely for 1 min with the heating source on. Then the heating source was
turned off and the extinguishing system was
manually activated. To pass the tests, the extinguishing system must (i) extinguish the fire
and (ii) prevent re-ignition for 20 minutes or
until the oil temperature is at least 34 C below
the observed auto-ignition temperature.
In the splash tests, the ignited oil was allowed
to burn freely for about 4 min till it stabilised,
after which the system was manually activated.
To pass the test, the extinguishing system must
(i) extinguish the fire and (ii) cause no splashing of grease.
Exit
to G
alley
Duct
s
Hoo
d
ryer
Fat F
Deep
4Pipe
Actu
ation
Valv
Pres
e
sure
Gau
ge
Shut
-off V
al
Wate
r
Cylin
12 m
ve
der
Gas
Cylin
der
HI-FOG
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3. HI-FOG system
Two different HI-FOG systems, each with two slightly differing parameters, were tested. In each case a spray head
of type 4S 1FA 4FA/4FB 1000 was applied. Alternatively, a sprinkler head of type 2B 1MA 4FA/4FB 100D may be
used, as was verified in a worst-case test. The spray head was placed centrally above the fryer and projecting
vertically down.
Water was supplied to the spray head by the following systems:
1. Self-contained system:
Accumulator unit consisting of one 20 litre water cylinder and one 10 litre (System A) or 20 litre (System B) pressurised N2 cylinder (nominally 200 bar). Discharge pressure at the spray head is shown in figure
2. Pumped system:
Constant pressure pump supplying a pressure between 60 bar (System C) and 140 bar (System D) at the spray
head.
Pressure at spray
head (bar)
200
150
100
50
8
Time (min)
4. Results
All the tests were passed: the fires were extinguished in less than 20 seconds, and the oil temperature decreased to
the required 34 C below the observed auto-ignition temperature in less than two minutes. No splashing was observed in the splash tests.
NOTE: The tests described form the basis for the relevant type approvals.
A complete description of the tests and their results are given in the
Test Report No. RTE1280/01, VTT Building and Transport, April 2001
Marioff Corporation Oy, P.O. Box 86, Virnatie 3, FIN-01301 Vantaa, Finland,
tel +358 9 870 851, fax +358 9 8708 5399, e-mail info@marioff.fi, www.hi-fog.com