Part l — Test Criteria and Procedures for Showing Compliance with JAR 25.853, or 25.855.
Text derived from JAR–25 Appx F, Part I at Chg 14, plus Amendment 93/1, dated 08/03/93
(a) Material test criteria
(1) Interior compartments occupied
by crew or passengers.
(i) Interior ceiling panels,
interior wall panels, partitions, galley
structure, large cabinet walls, structural
flooring, and materials used in the
construction of stowage compartments
(other than underseat stowage
compartments and compartments for
stowing small items such as magazines
and maps) must be self-extinguishing
when tested vertically in accordance
with the applicable portions of Part I of
this Appendix. The average burn length
may not exceed 152.40 mm (6 inches)
and the average flame time after
removal of the flame source may not
exceed 15 seconds. Drippings from the
test specimen may not continue to flame
for more than an average of 3 seconds
after falling.
(ii) Floor covering, textiles
(including draperies and upholstery),
seat cushions, padding, decorative and
non-decorative coated fabrics, leather,
trays and galley furnishings, electrical
conduit, thermal and acoustical
insulation and insulation covering, air
ducting, joint and edge covering, liners
of Class B and E cargo or baggage
compartments, floor panels of Class B,
C, D, or E cargo or baggage
compartments, insulation blankets,
cargo covers and transparencies,
moulded and thermoformed parts, air
ducting joints, and trim strips
(decorative and chafing), that are
constructed of materials not covered in
sub-paragraph (iv) below, must be selfextinguishing
when tested vertically in
accordance with the applicable portions
of Part I of this Appendix or other
approved equivalent means. The
average burn length may not exceed
203·2 mm (8 inches), and the average
flame time after removal of the flame
source may not exceed 15 seconds.
Drippings from the test specimen may
not continue to flame for more than an
average of 5 seconds after falling.
(iii) Motion picture film must be
safety film meeting the Standard
Specifications for Safety Photographic
Film PHI.25 (available from the
American National Standards Institute,
1430 Broadway, New York, NY 10018).
If the film travels through ducts, the
ducts must meet the requirements of
sub-paragraph (ii) of this paragraph.
(iv) Clear plastic windows and
signs, parts constructed in whole or in
part of elastomeric materials, edge
lighted instrument assemblies consisting
of two or more instruments in a common
housing, seat belts, shoulder harnesses,
and cargo and baggage tiedown
equipment, including containers, bins,
pallets, etc, used in passenger or crew
compartments, may not have an average
burn rate greater than 63·5 mm
(2·5 inches) per minute when tested
horizontally in accordance with the
applicable portions of this Appendix.
(v) Except for small parts (such
as knobs, handles, rollers, fasteners,
clips, grommets, rub strips, pulleys, and
small electrical parts) that would not
contribute significantly to the
propagation of a fire and for electrical
wire and cable insulation, materials in
items not specified in paragraphs
(a)(1)(i),(ii),(iii), or (iv) of Part I of this
Appendix may not have a burn rate
greater than 101.6 mm (4 inches) per
minute when tested horizontally in
accordance with the applicable portions
of this Appendix.
(2) Cargo and baggage compartments
not occupied by crew or passengers.
(i) Thermal and acoustic
insulation (including coverings) used in
each cargo and baggage compartment
must be constructed of materials that meet
the requirements set forth in sub-paragraph
(a)(1)(ii) of Part I of this Appendix.
(ii) A cargo or baggage
compartment defined in JAR 25.857 as
Class B or E must have a liner
constructed of materials that meet the
requirements of sub-paragraph (a)(1)(ii)
of Part I of this Appendix and separated
from the aeroplane structure (except for
attachments). In addition, such liners
must be subjected to the 45 degree
angle test as specificed in sub-paragraph
(b) (6) of Part I of this Appendix. The
flame may not penetrate (pass through)
the material during application of the
flame or subsequent to its removal. The
average flame time after removal of the
flame source may not exceed
15 seconds, and the average glow time
may not exceed 10 seconds.
(iii) A cargo or baggage
compartment defined in JAR 25.857 as
Class B, C, D, or E must have floor
panels constructed of materials which
meet the requirements of sub-paragraph
(a)(1)(ii) of Part I of this Appendix and
which are separated from the aeroplane
structure (except for attachments). Such
panels must be subjected to the 45
degree angle test as specified in subparagraph
(b) (6) of Part I of this
Appendix. The flame may not penetrate
(pass through) the material during
application of the flame or subsequent
to its removal. The average flame time
after removal of the flame source may
not exceed 15 seconds, and the average
glow time may not exceed 10 seconds.
(iv) Insulation blankets and
covers used to protect cargo must be
constructed of materials that meet the
requirements of sub-paragraph (a)(1)(ii)
of Part I of this Appendix. Tiedown
equipment (including containers, bins,
and pallets) used in each cargo and
baggage compartment must be
constructed of materials that meet the
requirements of sub-paragraph (a)(1)(v)
of Part I of this Appendix.
(3) Electrical system components.
Insulation on electrical wire or cable installed
in any area of the fuselage must be selfextinguishing
when subjected to the 60 degree
test as specified in sub-paragraph (b) (7) of
Part I of this Appendix. The average burn
length may not exceed 76·2 mm (3 inches)
and the average flame time after removal of
the flame source may not exceed 30 seconds.
Drippings from the test specimen may not
continue to flame for more than an average of
3 seconds after falling.
(b) Test Procedures –
(1) Conditioning. Specimens must be
conditioned to 70 ± 5°F (21·11 ± 3°C), and at
50% ± 5% relative humidity until moisture
equilibrium is reached or for 24 hours. Each
specimen must remain in the conditioning
environment until it is subjected to the flame.
(2) Specimen configuration. Except
for small parts and electrical wire and cable
insulation, materials must be tested either as a
section cut from a fabricated part as installed
in the aeroplane or as a specimen simulating a
cut section, such as a specimen cut from a flat
sheet of the material or a model of the
fabricated part. The specimen may be cut
from any location in a fabricated part;
however, fabricated units, such as sandwich
panels, may not be separated for test. Except
as noted below, the specimen thickness must
be no thicker than the minimum thickness to
be qualified for use in the aeroplane. Test
specimens of thick foam parts, such as seat
cushions, must be 12·7 mm (½-inch) in
thickness. Test specimens of materials that
must meet the requirements of sub-paragraph
(a)(1)(v) of Part I of this Appendix must be
no more than 3·175 mm (1/8-inch) in
thickness. Electrical wire and cable specimens
must be the same size as used in the
aeroplane. In the case of fabrics, both the
warp and fill direction of the weave must be
tested to determine the most critical
flammability condition. Specimens must be
mounted in a metal frame so that the two long
edges and the upper edge are held securely
during the vertical test prescribed in subparagraph (4) of this paragraph and the two
long edges and the edge away from the flame
are held securely during the horizontal test
prescribed in sub-paragraph (5) of this
paragraph. The exposed area of the specimen
must be at least 50·8 mm (2 inches) wide and
304·8 mm (12 inches) long, unless the actual
size used in the aeroplane is smaller. The
edge to which the burner flame is applied
must not consist of the finished or protected
edge of the specimen but must be
representative of the actual cross-section of
the material or part as installed in the
aeroplane. The specimen must be mounted in
a metal frame so that all four edges are held
securely and the exposed area of the specimen
is at least 203·2 mm by 203·2 mm (8 inches
by 8 inches) during the 45° test prescribed in
sub-paragraph (6) of this paragraph.
(3) Apparatus. Except as provided in
sub-paragraph (7) of this paragraph, tests
must be conducted in a draught-free cabinet
in accordance with Federal Test Method
Standard 191 Model 5903 (revised Method
5902) for the vertical test, or Method 5906
for horizontal test (available from the General
Services Administration, Business Service
Centre, Region 3, Seventh & D Streets SW.,
Washington, DC 20407, USA). Specimens
which are too large for the cabinet must be
tested in similar draught-free conditions.
(4) Vertical test. A minimum of three
specimens must be tested and results
averaged. For fabrics, the direction of weave
corresponding to the most critical
flammability conditions must be parallel to
the longest dimension. Each specimen must
be supported vertically. The specimen must
be exposed to a Bunsen or Tirril burner with a
nominal 9·525 mm (3/8-inch) I.D. tube
adjusted to give a flame of 38·1 mm
(1½ inches) in height. The minimum flame
temperature measured by a calibrated
thermocouple pyrometer in the centre of the
flame must be 843·33 °C (1550 °F). The
lower edge of the specimen must be
19·05 mm (¾-inch) above the top edge of the
burner. The flame must be applied to the
centre line of the lower edge of the specimen.
For materials covered by sub-paragraph
(a)(1)(i) of Part I of this Appendix, the flame
must be applied for 60 seconds and then
removed. For materials covered by subparagraph (a)(1)(ii) of Part I of this
Appendix, the flame must be applied for
12 seconds and then removed. Flame time,
burn length, and flaming time of drippings, if
any, may be recorded. The burn length
determined in accordance with sub-paragraph
(7) of this paragraph must be measured to the
nearest 2·54 mm (tenth of an inch).
(5) Horizontal test. A minimum of
three specimens must be tested and the results
averaged. Each specimen must be supported
horizontally. The exposed surface, when
installed in the aircraft, must be face down for
the test. The specimen must be exposed to a
Bunsen or Tirrill burner with a nominal
9·525 mm (3/8-inch) I.D. tube adjusted to give
a flame of 38·1 mm (1½ inches) in height.
The minimum flame temperature measured by
a calibrated thermocouple pyrometer in the
centre of the flame must be 843·33°C
(1550°F). The specimen must be positioned
so that the edge being tested is centred
19·05 mm (¾-inch) above the top of the
burner. The flame must be applied for
15 seconds and then removed. A minimum of
254 mm (10 inches) of specimen must be used
for timing purposes, approximately 38·1 mm
(1½ inches) must burn before the burning
front reaches the timing zone, and the average
burn rate must be recorded.
(6) Forty-five degree test. A minimum
of three specimens must be tested and the
results averaged. The specimens must be
supported at an angle of 45° to a horizontal
surface. The exposed surface when installed
in the aircraft must be face down for the test.
The specimens must be exposed to a Bunsen
or Tirrill burner with a nominal 9·525 mm
(3/8-inch) I.D. tube adjusted to give a flame of
38·1 mm (1½ inches) in height. The minimum
flame temperature measured by a calibrated
thermocouple pyrometer in the centre of the
flame must be 843·33°C (1550°F). Suitable
precautions must be taken to avoid draughts.
The flame must be applied for 30 seconds
with one-third contacting the material at the
centre of the specimen and then removed.
Flame time, glow time, and whether the flame
penetrates (passes through) the specimen must
be recorded.
(7) Sixty degree test. A minimum of
three specimens of each wire specification
(make and size) must be tested. The specimen
of wire or cable (including insulation) must
be placed at an angle of 60° with the
horizontal in the cabinet specified in subparagraph (3) of this paragraph with the
cabinet door open during the test, or must be
placed within a chamber approximately
609·6 mm (2 feet) high by 304·8 mm by
304·8 mm (1 foot by 1 foot), open at the top
and at one vertical side (front), and which
allows sufficient flow of air for complete
combustion, but which is free from draughts.
The specimen must be parallel to and
approximately 152·4 mm (6 inches) from the
front of the chamber. The lower end of the
specimen must be held rigidly clamped. The
upper end of the specimen must pass over a
pulley or rod and must have an appropriate
weight attached to it so that the specimen is
held tautly throughout the flammability test.
The test specimen span between lower clamp
and upper pulley or rod must be 609·6 mm
(24 inches) and must be marked 203·2 mm
(8 inches) from the lower end to indicate the central point for flame application. A flame
from a Bunsen or Tirrill burner must be
applied for 30 seconds at the test mark. The
burner must be mounted underneath the test
mark on the specimen, perpendicular to the
specimen and at an angle of 30° to the
vertical plane of the specimen. The burner
must have a nominal bore of 9·525 mm
(3/8-inch) and be adjusted to provide a
76·2 mm (3-inch) high flame with an inner
cone approximately one-third of the flame
height. The minimum temperature of the
hottest portion of the flame, as measured with
a calibrated thermocouple pyrometer, may not
be less than 954·44°C (1750°F). The burner
must be positioned so that the hottest portion
of the flame is applied to the test mark on the
wire. Flame time, burn length, and flaming
time of drippings, if any, must be recorded.
The burn length determined in accordance
with sub-paragraph (8) of this paragraph must
be measured to the nearest 2·54 mm (tenth of
an inch). Breaking of the wire specimens is
not considered a failure.
(8) Burn length. Burn length is the
distance from the original edge to the farthest
evidence of damage to the test specimen due
to flame impingement, including areas of
partial or complete consumption, charring, or
embrittlement, but not including areas sooted,
stained, warped, or discoloured, nor areas
where material has shrunk or melted away
from the heat source.
Part II — Flammability of Seat Cushions
Text derived from: JAR–25 Appendix F, Part II at Chg 12, plus Amendment 86/1, 16/6/86, and reissued by
Chg 13 15/10/89
(a) Criteria for Acceptance. Each seat
cushion must meet the following criteria:
(1) At least three sets of seat bottom
and seat back cushion specimens must be
tested.
(2) If the cushion is constructed with
a fire blocking material, the fire blocking
material must completely enclose the cushion
foam core material.
(3) Each specimen tested must be
fabricated using the principal components
(i.e. foam core, flotation material, fire
blocking material, if used, and dress
covering) and assembly processes
(representative seams and closures) intended
for use in the production articles. If a
different material combination is used for the
back cushion than for the bottom cushion,
both material combinations must be tested as
complete specimen sets, each set consisting of
a back cushion specimen and a bottom
cushion specimen. If a cushion, including
outer dress covering, is demonstrated to meet
the requirements of this Appendix using the
oil burner test, the dress covering of that
cushion may be replaced with a similar dress
covering provided the burn length of the
replacement covering, as determined by the
test specified in JAR 25.853(b), does not
exceed the corresponding burn length of the
dress covering used on the cushion subjected
to the oil burner test.
(4) For at least two-thirds of the total
number of specimen sets tested, the burn
length from the burner must not reach the side
of the cushion opposite the burner. The burn
length must not exceed 431.8 mm (17 inches).
Burn length is the perpendicular distance
from the inside edge of the seat frame closest
to the burner to the farthest evidence of
damage to the test specimen due to flame
impingement, including areas of partial or
complete consumption, charring, or
embrittlement, but not including areas sooted,
stained, warped, or discoloured, or areas
where material has shrunk or melted away
from the heat source.
(5) The average percentage weight
loss must not exceed 10 percent. Also, at least
two-thirds of the total number of specimen
sets tested must not exceed 10 percent weight
loss. All droppings falling from the cushions
and mounting stand are to be discarded before
the after-test weight is determined. The
percentage weight loss for a specimen set is
the weight of the specimen set before testing
less the weight of the specimen set after
testing expressed as the percentage of the
weight before testing.
(b) Test Conditions. Vertical air velocity
should average 0.127 m/s ± 0.05 m/s (25 fpm
± 10 fpm) at the top of the back seat cushion.
Horizontal air velocity should be below 0.05 m/s (10 fpm) just above the bottom seat cushion. Air velocities should be measured with the ventilation hood operating and the burner motor off.
(c) Test Specimens
(1) For each test, one set of cushion
specimens representing a seat bottom and seat
back cushion must be used.
(2) The seat bottom cushion specimen
must be 457 ± 3 mm (18 ± 0·125 inches) wide
by 508 ± 3 mm (20 ± 0·125 inches) deep by
102 ± 3 mm (4 ± 0·125 inches) thick,
exclusive of fabric closures and seam overlap.
(3) The seat back cushion specimen
must be 432 ± 3 mm (18 ± 0·125 inches) wide
by 635 ± 3 mm (25 ± 0·125 inches) high by
51 ± 3 mm (2 ± 0·125 inches) thick, exclusive
of fabric closures and seam overlap.
(4) The specimens must be
conditioned at 21 ± 2ºC (70 ± 5ºF) 55%
± 10% relative humidity for at least 24 hours
before testing.
(d) Test Apparatus. The arrangement of the
test apparatus is shown in Figure 1 through 5
and must include the components described in
this paragraph. Minor details of the apparatus
may vary, depending on the model burner used.
(1) Specimen Mounting Stand. The
mounting stand for the test specimens consist
of steel angles, as shown in Figure 1. The
length of the mounting stand legs is 305 ±
3 mm (12 ± 0·125 inches). The mounting
stand must be used for mounting the test
specimen seat bottom and seat back, as shown
in Figure 2. The mounting stand should also
include a suitable drip pan lined with
aluminium foil, dull side up.
(2) Test Burner. The burner to be
used in testing must –
(i) Be a modified gun type;
(ii) Have an 80-degree spray
angle nozzle nominally rated for
2·25 US gallons/hour at 100 psi;
(iii) Have a 305 mm (12-inch)
burner cone installed at the end of the
draft tube, with an opening 152 mm
(6 inches) high and 208 mm (11 inches)
wide, as shown in Figure 3; and
(iv) Have a burner fuel pressure
regulator that is adjusted to deliver a
nominal 2·0 US gallon/hour of # 2
Grade kerosene or equivalent required
for the test.
(3) Calorimeter
(i) The calorimeter to be used
in testing must be a 0–17·0 Watts/cm2
(0–15·0 BTU per ft2 sec) calorimeter,
accurate ± 3%, mounted in a 152 by
305 mm (6 inch by 12 inch) by 19 mm
(0·75 inch) thick calcium silicate
insulating board which is attached to a
steel angle bracket for placement in the
test stand during burner calibration, as
shown in Figure 4.
(ii) Because crumbling of the
insulating board with service can result
in misalignment of the calorimeter, the
calorimeter must be monitored and the
mounting shimmed, as necessary, to
ensure that the calorimeter face is flush
with the exposed plane of the insulating
board in a plane parallel to the exit of
the test burner cone.
(4) Thermocouples. The seven
thermo-couples to be used for testing must be
0·0625 to 0·125 inch metal sheathed, ceramic
packed, type K, grounded thermocouples with
a nominal 22 to 30 American wire gauge
(AWG)-size conductor (0·643 mm (0·0253
inches) to 0·254 mm (0·010 inches) diameter).
The seven thermocouples must be attached to
a steel angle bracket to form a thermocouple
rake for placement in the test stand during
burner calibration as shown in Figure 5.
(5) Apparatus Arrangement. The test
burner must be mounted on a suitable stand to
position the exit of the burner cone a distance
of 102 ± 3 mm (4 ± 0·125 inches) from one
side of the specimen mounting stand. The
burner stand should have the capability of
allowing the burner to be swung from the
specimen mounting stand during warmup
periods.
(6) Data Recording. A recording
potentiometer or other suitable calibrated
instrument with an appropriate range must be
used to measure and record the outputs of the
calorimeter and the thermocouples.
(7) Weight Scale. Weighing Device –
A device must be used that with proper
procedures may determine the before and
after test weights of each set of seat cushion
specimens within 9 grams (0·02 pound). A
continuous weighing system is preferred.
(8) Timing Device. A stopwatch or
other device (calibrated to ± 1 second) must
be used to measure the time of application of
the burner flame and self-extinguishing time
or test duration.
(e) Preparation of Apparatus. Before
calibration, all equipment must be turned on and
the burner fuel must be adjusted as specified in
sub-paragraph (d)(2).
(f) Calibration. To ensure the proper
thermal output of the burner, the following test
must be made:
(1) Place the calorimeter on the test
stand as shown in Figure 4 at a distance of
102 ± 3 mm (4 ± 0·125 inches) from the exit
of the burner cone.
(2) Turn on the burner, allow it to run
for 2 minutes for warmup, and adjust the
burner air intake damper to produce a reading
of 11·9 ± 0·6 Watts/cm2 (10·5 ± 0·5 BTU per
ft2 sec) on the calorimeter to ensure steady
state conditions have been achieved. Turn off
the burner.
(3) Replace the calorimeter with the
thermocouple rake (Figure 5).
(4) Turn on the burner and ensure that
the thermocouples are reading 1038 ± 38ºC
(1900 ± 100ºF) to ensure steady state
conditions have been achieved.
(5) If the calorimeter and
thermocouples do not read within range,
repeat steps in sub-paragraphs 1 to 4 and
adjust the burner air intake damper until the
proper readings are obtained. The
thermocouple rake and the calorimeter should
be used frequently to maintain and record calibrated test parameters. Until the specific
apparatus has demonstrated consistency, each
test should be calibrated. After consistency
has been confirmed, several tests may be
conducted with the pre-test calibration before
and a calibration check after the series.
(g) Test Procedures. The flammability of
each set of specimens must be tested as follows:
(1) Record the weight of each set of
seat bottom and seat back cushion specimens
to be tested to the nearest 9 grams
(0·02 pound).
(2) Mount the seat bottom and seat
back cushion test specimens on the test stand
as shown in Figure 2, securing the seat back
cushion specimen to the test stand at the top.
(3) Swing the burner into position and
ensure that the distance from the exit of the
burner cone to the side of the seat bottom
cushion specimen is 102 ± 3 mm (4 ± 0·125
inches).
(4) Swing the burner away from the
test position. Turn on the burner and allow it
to run for 2 minutes to provide adequate
warmup of the burner cone and flame
stabilization.
(5) To begin the test, swing the burner
into the test position and simultaneously start
the timing device.
(6) Expose the seat bottom cushion
specimen to the burner for 2 minutes and then
turn off the burner. Immediately swing the
burner away from the test position. Terminate
test 7 minutes after initiating cushion
exposure to the flame by use of a gaseous
extinguishing agent (i.e. Halon or CO2).
(7) Determine the weight of the
remains of the seat cushion specimen set left
on the mounting stand to the nearest 9 grams
(0·02 pound) excluding all droppings.
(h) Test Report. With respect to all
specimen sets tested for a particular seat cushion
for which testing of compliance is performed,
the following information must be recorded:
(1) An identification and description
of the specimens being tested.
(2) The number of specimen sets
tested.
(3) The initial weight and residual
weight of each set, the calculated percentage
weight loss of each set, and the calculated
average percentage weight loss for the total
number of sets tested.
(4) The burn length for each set
tested.
Част III - Тестов метод за установяване
устойчивостта на облицовката на
товарното отделение на проникване на
пламък
Текст, извлечен от: JAR-25 Приложение F,
Част III при Промяна 12, плюс Изменение 86/2 5/10.86, и преиздаден при Промяна 13
(a) Критерии за одобрение.
(1) Трябва да бъдат тествани поне три образеца от стенни или таванни облицовъчни панели от товарното отделение
(2) Всеки тестван образец трябва да
имитира стенния или таванния
облицовъчен панел на товарното
отделение, включително всякакви
характеристики на дизайна, като съединения, лампови елементи и др.,
повредата на които би повлияла на
способността на облицовката безопасно да задържи пожар.
(3) В рамките на 5 минути след прилагане на източника на пламък, не трябва да има проникване на пламъка в никой образец, а върховата температура, измерена на 4 инча над горната повърхност на
хоризонталната тестова проба не трябва да надвишава 222.22ºC (400ºF).
(b) Обобщение на метода. Този метод
осигурява лабораторна тестова процедура за измерване на способността на облицовъчните материали в товарното отделение да издържат на проникване на пламък при източник на огън до 2
американски галона керосин от Клас 2 на час или еквивалентен такъв. Таванните и стенните облицовъчни панели могат да бъдат тествани индивидуално, при условие че се използва преграда, симулираща липсващия панел. Всеки образец, който премине теста като таванен облицовъчен панел, може да се
използва като стенен облицовъчен панел.
(c) Тестови образци
(1) Образецът, който ще се тества, трябва да е с размери 406 ± 3 mm (16 ± 0.125 инча) на 610 ± 3 mm (24 ± 0.125 инча).
(2) Образецът трябва да е климатизиран при 21ºC ± 2ºC (70ºF ± 5ºF) и влажност 55% ± 5% поне за 24 часа преди теста.
(d) Тестова апаратура. Подредбата на
тестовата апаратура, която е показана на Илюстрация 3 от Част II и на Илюстрации от 1 до 3 в тази Част на Приложение F трябва да включва компонентите, описани в тази алинея. Незначителните подробности на апаратурата могат да варират в зависимост от използвания модел горелка.
(1) Стойка за образеца. Стойката за
поставяне на тестовия образец се състои от стоманени ъгли, както е показано на Илюстрация 1.
(2) Тестова горелка. Горелката, която
ще се използва за теста трябва:
(i) Да е от вида модифициран пистолет;
(ii) Да има подходяща дюза и да поддържа налягане на горивото, което дава поток на горивото от 2 американски галона на час.
Например: 80 градусова дюза с номинален капацитет от 2.25 американски галона на час и работеща при 85 паунда на квадратен инч (PSI) за да дава 2.03 американски галона на час.
(iii) Да има удължител на горелката с
дължина 305 mm (12 инча), монтиран на края на изтеглящата тръба, с отвор, висок 152 mm (6 инча) и широк 280 mm (11 инча), както е показано на Илюстрация 3 от Част II на това Приложение.
(iv) Да има регулатор на инжекторното горивно налягане, настроен да доставя номинал от 2.0 американски галона керосин от Клас 2 или еквивалентен, на час.
(3) Калориметър
(i) Калориметърът, който ще се използва за теста трябва да е мерител на общ топлинен поток, тип Gardon (фолиев), с подходящ обхват, приблизително 0-17.0 вата/cm2 (0-15.0 BTU на ft2 сек). Калориметърът трябва да е монтиран в изолационен блок с размери 152 на 305 mm (6 инча на 12 инча) и дебелина 19 mm (0.75 инча), който е прикрепен към стоманена ъглова скоба за поставяне в
тестовата стойка по време на калибровката на горелката, както е показано на Илюстрация 2 в тази Част на това Приложение.
(ii) Изолационният блок трябва да се
наблюдава за изменения и при нужда
закрепването да се уплътнява, за да е сигурно, че лицето на калориметъра е успоредно на изходната равнина на конуса на тестовата горелка.
(4) Термодвойки. Седемте термодвойки, които се използват в теста, трябва да са заземени термодвойки от вид K, в керамична обшивка от 0.0625 инча, с проводник с номинална американска дебелина за жица (AWG) от 30 (диаметър 0.254 mm (0.010 инча)). Седемте
термодвойки трябва да са прикрепени
към стоманена ъглова скоба, за да образуват гребло от термодвойки, което да се постави в тестовата стойка, по време на калибровката на горелката, както е показано на Илюстрация 3 в тази Част на това Приложение.
(5) Подредба на апаратурата.
Тестовата горелка трябва да е монтирана на подходяща поставка, така че изхода на конуса на горелката да е на разстояние 203.2 mm (8 инча) от таванния облицовъчен панел и 50.8 mm (2 инча) от стенния облицовъчен панел. Стойката на
горелката трябва да позволява завъртането на горелката настрани от тестовия образец по време на загряващия период.
(6) Измервателни уреди. За измерване и записване отчитанията на калориметъра и термодвойките, трябва да се използва записващ потенциометър или друг подходящ калибриран уред с подходящ обхват.
(7) Уред за измерване на времето. За
измерване времето на прилагане на
пламъка и времето за проникване на
пламъка, ако това стане, трябва да се
използва хронометър или друг уред.
(e) Подготовка на апаратурата. Преди
калибровката, цялото оборудване трябва да бъде включено и оставено да се стабилизира, а потокът на горивото за горелката трябва се настрои, както е посочено в подточка (d)(2).
(f) Калибровка. За да се осигури подходяща изходна температура от
горелката, трябва да се проведе следният тест:
(1) Отстранете удължителя на горелката от края на изтеглящата тръба. Включете издухващата част от горелката, без да включвате горивото или възпламенителите. Измерете скоростта на въздуха като използвате анемометър с гореща тел в центъра на изтеглящата тръба, през лицето на отвора. Настройте
регулатора така, че скоростта на въздуха да е в диапазона от 7.97 до 9.14 m/s (1550 до 1800 fpm). Ако при изхода на изтеглящата тръба се използват тримери, те трябва да се отстранят преди това измерване. Поставете отново удължителния конус на изтеглящата тръба.
(2) Поставете калориметъра на тестовата стойка, както е показано на Илюстрация 2, на разстояние 203 mm (8 инча) от изхода на конуса на горелката, за да симулирате
позицията на хоризонталния тестов
образец.
(3) Включете горелката, оставете я да работи 2 минути за да загрее и настройте регулатора така, че да дава отчитане на калориметъра от 9.1 ± 0.6 вата/cm2 (8.0 ± 0.5 BTU на ft2 сек).
(4) Заменете калориметъра с греблото термодвойки (Илюстрация 3).
(5) Включете горелката и се уверете, че всяка от седемте термодвойки отчита 927 ± 38ºC (1700 ± 100ºF), за да е сигурно, че са постигнати условия на стабилно състояние. Ако температурата е извън този обхват, повторете стъпките от 2 до 5 докато получите правилно отчитане.
(6) Изключете горелката и отстранете
греблото с термодвойките.
(7) Повторете (f)(1) за да се уверите, че горелката е в правилния диапазон.
(g) Тестова процедура
(1) Поставете термодвойка от същия вид като използваната при калибровката, на разстояние 101 mm (4 инча) над хоризонталния (таванен) образец. Термодвойката трябва да е центрирана над конуса на горелката.
(2) Поставете тестовия образец на тестовата стойка, показана на Илюстрация 1, във вертикално или хоризонтално положение. Поставете изолационния материал в другото положение.
(3) Позиционирайте горелката така, че пламъците да не въздействат на образеца. Включете горелката и я оставете да работи 2 минути. Завъртете горелката за да приложите пламъка към образеца и в
същото време включете уреда за измерване на времето.
(4) Изложете тестовия образец на пламъка за 5 минути, след което изключете горелката. Ако се наблюдава проникване на пламъка, тестът може да бъде прекратен по-рано.
(5) При тестването на таванни облицовъчни панели, запишете
връхната температура, измерена на
101.6 mm (4 инча) над образеца.
(6) Запишете времето на проникване
на пламъка, ако е приложимо.
(h) Тестов доклад. Тестовият доклад
трябва да включва следното:
(1) Пълно описание на тестваните
материали, включително вид, производител, дебелина и други подходящи данни.
(2) Наблюдения на поведението на
тестовите образци по време на излагането на пламъка, като разслояване, запалване на смола, дим и др., включително времето на тези събития.
(3) Времето на проникване на пламъка, ако е приложимо, за всеки от трите тествани образеца.
(4) Ориентация на панела (таванен или стенен).
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