GB 7633-87
security standardization Commission 1987-03-12 approved 10-1987-01
implemented this standard is applicable to buildings have no worth mentioning is worth mentioning is the door, door and curtain of fire resistance test, test to determine its fire resistance.
This standard equivalent ISO 3008-1976 the whole worth mentioning doors and shutter fire resistance test ", in the standard format and wording of the provisions required by GB 1.1 — 81 of the standardization work of writing standards prepared the General provisions of law.
1
1.1 test equipment
door heater and shutter fire resistance test is implemented by the furnace. Furnace should be one of the specimen under fire surface subjected to the provisions of Chapter 2 of the elevated temperature conditions and the provisions of Chapter 3 and pressure conditions should be met to install and test specimen and observation requirements.
1.2 furnace temperature
test device furnace temperature tests should use wire thickness 0.75 ~ 1.50mm thermocouple, its quantity not less than 5 PCs. Thermocouple for thermal contacts should give sleeve ends 25mm, furnace temperature measurement accuracy of ± 15 ° c in less than 24 hours.
1.3 specimen back fire surface temperature
specimen test device back fire surface temperature tests should use diameter not greater than 0.70mm thermocouple, its number is worth mentioning the door; setting and shutter not less than 8 branches, worth mentioning is the door of no less than 5 PCs. Specimen back fire surface temperature measurement accuracy should be ± 5 ℃.
1.4 furnace pressure
test device furnace pressure test should be used within an accuracy of ± 1Pa measuring gauge and static pressure probe tube (see Figure 3).
1.5 specimen back fire surface radiation heat
specimen test device back fire surface radiation heat test can adopt single-phase thermal radiometers or insulating power meter.
2 warming conditions 2.1 warming
door form and shutter fire resistance test using flame heating to be similar to the actual fire flame effect.
2.2 time a temperature
test standard curve, furnace temperature rise over time and are subject to the following functions:
relationships control T-T0 = 345lg (8t + 1) ... ... ... ... ... ... ... ... ... ... ... ... (1)
Type: t-test of time,
min, T-warming to/time of furnace temperature,
T0 ¡æ,-furnace initial temperature, ℃.
Indicated above function curve as shown in Figure 1.
0_i1025 style="WIDTH: 330pt; HEIGHT: 306.75pt "type =" # _x0000_t75 "coordsize =" 21600,
21600 ">
figure 1 time a representative of the relationship between temperature values are shown in the following table
;
time/(min) 5 10 15 30 60 90 120 temperature T-T0 (° c) 556 659 718 821 925
2.3 986 1029 furnace temperature tolerance and furnace
temperature uniformity requirements furnace temperature rise allowed average deviation by type (2)
identified:
... ... ... ... ... ... ... ... ... ... ... ... (2)
Type: A — average temperature in the furnace to the time function
integral values, B-time temperature standard curve on time function integral values.
Average deviation of allowed values must meet the following criteria
; (a) before the test is 15 per cent in 10min;
(b) trial begins 11 ~ 30min within 10 per cent;
(c) since start of 5 per cent after 30min.
On time integral of the function is: (a), the interval of time not exceeding 1min, (b), not exceeding 2min, (c)
, does not exceed 5min.
When test to any 10min, temperature measurement point measured furnace temperature and the time difference between the nominal temperature shall not be greater than ± 100 ℃. Test with a lot of combustible materials of specimen, after the trial began 10min, no temperature measurement point of furnace temperature and the time difference between the nominal temperature shall not be greater than ± 200 ℃.
3 furnace pressure
test conditions start 5min, should remain in-furnace pressure in the upper part, even if a third location above the specimen from bottom of the furnace pressure higher than the indoor air pressure 102Pa.
4.1 4 specimens
door dimensions or shutter of specimen should be a complete portfolio, its size should be consistent with our building modular system requirements, and have the engineering use of representation. If the actual size is large and cannot be installed on a test furnace, the specimen should take furnace can hold maximum dimensions, its appropriate size should be not less than the width 2m, high
2.5m provisions:
on number 4.2 structure symmetry of the door or curtain, sample quantity is 1, the structural asymmetry, specimen number is 2 (see Chapter 5).
4.3
doors constructed and shutter specimen of production, the decoration and flame treatment should and actual use of exactly the same, and should include all hardware and accessories.
4.4
specimen installed installation should reflect the actual situation. (See Figure 2) door leaf and door frame in between the cracks should be consistent with the construction and installation the project quality and acceptance criteria. On the wooden door hinges, door leaf and door frame in between the cracks should be the same as the actual usage. If the slit size cannot be determined, the slit width is reserved and should not, and diameter shorter than 3 mm, the specific values should be written to the test report.
Door or curtain should be installed on the actual use of similar wall to experiment. When the walls-not sure, you can select concrete wall or brick walls, its thickness may act according to the expected duration of the test. If the expected test duration in 2h following, available thickness of not less than ·adjustment wall, if the estimated time over 2h or 2h available thickness of not less than mm wall.
Specimen should normally be installed so that the door frame and the wall back fire surface. But when a specimen of the type can be installed, or that the install may affect the specimen under fire intensity, or actual use in the absence of such circumstances.
4.5
when curing specimens containing hygroscopic materials should be construction for drying or conservation. Test specimen before the wet state should be in the building's actual use roughly the same.
Installation piece in the wall, in the case of brick wall, before the test, not less than two weeks in the case of concrete masonry, wall, you should test for a period of not less than four weeks prior to the time stamp, and curing and drying process.
5 试验程序
> When the specimen is a symmetrical structure, you can make either side of the fire to experiment. If the specimen is not symmetrical structure, dealing with two different surfaces to experiment and to which poor fire performance to determine its fire resistance. If you can determine the asymmetric structure to hit the surface of the specimen, you select the critical surface to experiment. Test period shall be adjusted according to Chapter 6 of the articles require observation. In the test, when a specimen appears in Chapter 7 of the judgment under any terms and conditions, the test conditions shall be terminated, or that does not appear in Chapter 7, but has reached its scheduled time, the test can also be completed.
6 test observation 6.1
furnace temperature furnace should be uniform layout 5-8 temperature measuring points (see Figure 2). Each measurement has its specimens under fire surface 100mm. The temperature in the furnace and the average temperature should not exceed 5min record once. Average temperature should be ready to automatically appear on the screen.
6.2
furnace pressure furnace at least should be set to three static pressure measurement point and along the edges of the near specimen a axis arrangement, i.e. the top edge of the specimen, bottom and one-third of the height of the specimen position a (see Figure 2). Furnace pressure distribution should bring samples from more than one third of the parts maintain the provisions of Chapter 3 of pressure.
6.3 specimen back fire
specimen surface temperature back fire surface temperature requirements with 1.3 be determination of device. For non-insulated layer of metal doors, iron curtain or door of glass mosaic, determination of the temperature may not. Back to fire surface temperature measurement points should be c door leaf arrangement 5 temperature measuring points, i.e. a quarter of the door leaf and door of the center point, door frame 3 temperature measurement point, i.e. the second vertical edges on the navigating bridge and in the height and the center of the point. Door leaf temperature measurement points should not be arranged in the rebar and metal connectors, or inadequate from the edge of the specimen, door frame ·adjustment for temperature measurement points should be from the specimen edge 15mm. Thermocouples of hot-end with a diameter of 12mm, thickness of the copper plate 0.2mm circle circle welding. Measuring point arrangement in the sample, the application area of copper sheets 30mm× 30mm, thickness 2mm, bulk density to 1000kg/m3 drying of square blocks of asbestos.
6.4 specimen back fire surface radiation heat specimen back fire surface radiation heat intensity applied radiant heat meter along the center of the normal direction of specimen, leaving the specimen back fire surface — set distance. For a door insulation, the distance to the width of a door, for without thermal insulation layer of curtain or door, the distance to the height of the specimen.
6.5
cotton pad test test, when the door leaf and the surrounding a flame and gas possible channel appears, be it cracks, holes or other porous, should be in the channel, at regular intervals with a cotton pad. Cotton pad should not be in contact with the sample, but it should be centre near cracks, holes or other porous, distance in 20 ~ 30mm, dwell time of not less than 10s, not greater than 30s. If cotton pad in the previous post already moisture or scorched, should not be used.
Cotton pad size approximately is 100 mm square, 20mm thick. Cotton pad should be new, non staining, soft, cotton fiber, should not be mixed with man-made fibres, its weight is 3 ~ 4g. Cotton pad should be placed in the oven in 100 ° c, dry at least 0.5h. Cotton pad should be clipped in φ 1 m m of wire made of area is 100 mm × ·adjustment frame, frame installed a root length about 750mm metal handle. In the cotton pad start on fire, you should record the time and position of combustion.
6.6 other
observed issues should also be recorded in the test specimen of deformation and specimen appears when all or part of the damage. Specimen back fire surface such as a flame going up to more than 10s or 10s, and where there's smoke, a situation should also be recorded. After trial, the door or curtain opens and the mechanical properties should be description.
7 fire resistance
door conditions and shutter fire resistance of insulated by integrity and condition of the judgment. Test, when any of the following provisions determine the conditions, the fire resistance of the specimen has been achieved.
7.1
lost integrity 7.1.1 specimen back fire surface
specimen appears flame fire backSurface appear as flame and 10s or 10s over time should be recorded.
7.1.2 ignition
cotton cushion cotton pad originally appeared on fire when time should be recorded.
7.1.3 collapse if required to determine the collapse, in the conditions 7.1.1 and 7.1.2, the pilot appears to continue. Specimen collapse or penetrating an opening formed or door locks, door latch mechanism of the time when the damage occurs should be recorded.
7.2 loss
insulation 7.2.1 specimen back fire surface average temperature rise
reached 140 ℃ specimen back fire surface average temperature than its initial temperature of more than 140 ° c time should be recorded.
7.2.2 specimen back fire surface maximum temperature rise
reached 180 ° c non-framed glass surface or a heat insulation layer of specimen back fire surface maximum temperature than its initial temperature of more than 180 ℃ time should be recorded.
7.2.3 door orbital back fire surface maximum temperature rise
reached 180 ° door back fire surface maximum temperature than its initial temperature of more than 180 ℃ time should be recorded.
7.2.4 specimen back fire surface
thermal radiation intensity in accordance with the provisions of clause 6.4 distance, measured specimen back fire surface radiation intensity exceeds the critical time when the heat radiation intensity should be recorded.
When staff retention time clock for 5s, critical heat radiation intensity as 0.96W/
cm2; when residence time clock for 3s, the critical heat radiation intensity as 1.05W/cm2.
8
test test report should include the following
content: a test organization entrusted with such a name. ";
b £ ® test organizer name; c.
test date; d £ ® factory name and the name
products; e. specimen constructed detailed description and the drawings, materials for technical data, the gap between door leaf and door frame;
records f. specimen with the surrounding wall, fixed, specimens and the surrounding wall is there seams between should also be
g; if the thickness of glass, should indicate with glass
; h. specimen under fire
side; I
. test results (1) heating time/pressure diagrams and time/temperature
curve; (2), in accordance with 7.2.1, 7.2.2 7.2.3 requirements measured each time/temperature
of outcomes; (3) no longer meets the conditions for determining the fire resistance;
time (4) test procedure for the performance of any other specimens, including specimen cooling capacity and after turn on
mechanical properties; (5) the door or curtain according to Chapter 7 a judgment criteria identified in the fire resistance.
Additional notes: the standard public security Ministry by People's Republic of China.
This standard by the Ministry of public security fire fight Science Graduate School in Sichuan province, the Ministry of public security fire fight Science Graduate School in Tianjin is responsible for drafting.
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