BS ISO 10294-5 pdf download – Fire resistance tests ——Fire dampers for air distribution systems—— Part 5: Intumescent fire dampers

BS ISO 10294-5 pdf download – Fire resistance tests ——Fire dampers for air distribution systems—— Part 5: Intumescent fire dampers.
NOTE The reason for the 5Ocycle test for mechanical dampers s to demonstrate the Iikehhood 01 their functioning ellen called upon to do so, without janwiing or disintegrating Clearly a product that is activated by an Irreversible diemoal activity cannot be activated more than once. There are no parts moving mechanically in ai intwieecent lire damper. o4 the swelbng of the irlumescent material alien activated by heat
4.1 .3.1 .2 Time to close
There is no requirement for the damper to close before 2 miii, but it shall satisfy leakage requirements after 5 mm into the test.
NOTE The 2 me limit In the test for mechanical dampers a the time beyond which a deemed that dampers that have not dosed will not do so; therefore, continuation of the test would be irrelevant. Since the time deemed necessary for the tumace to stabilize is S nn and no sensor values are considered accurate enouØi to record until that time has elapsed, the 2 mm period has no relevne in the case of inlumescent dampers
4.1.3.1.3 CondensIng device
A suitable condensing device may be considered to be a water tank fed with water at ambient temperature
with about 9 m of measuring duct immersed lithe tank prior to reaching the measuring device.
4.2 Reaction to fire tests — Intumescent materials
42.1 General
To ensure some equivalence with a mechanical damper, the lollowing tests are described that allow an assessment of the reliability ot Intumescent materials used for mntumescent fire dampers. These tests can be used as an initial type test to get the performance of an inturnescerrt material tested. The result is normally used to define the specification for the matenal. In this case 10 specimens shall normally be tested. For the purpose of tactory control, two specimens are normally used to show compliance with the specification.
Thermal activation and faulty setoff are normally tested only in the course of the initial type test but all three alternatives br ‘expansion pressure’ are suitable tests for factory control.
Expansion pressure is normally determined at various temperatures during the initial type test to find out the range of m.nrum temperature dependence. For the purposes of factory production control these tests are normally conducted at a temperature in the range of temperature independence to ensure that the effect of temperature variation on the resutts is minimized
Complete components or sections of components of the damper, in sufficient quantity to complete the range of testing required by the test authority and manufacturer, shall be nominated as representative specimens for initial type testing and all subsequent production control contormity tests, as dictated by local certification/approval needs.
Sample sets shalt be placed in ambient laboratory conditions consisting of a temperature of 23 C z 4 DC and a humidity of 50% for a minimum of seven days.
The mass of the stainless steel weight shall have an accuracy of 2.5%.
The configuration of the stainless steel pipe and weights is shown ii Figure B.2.
42.4.3.1.3 Muffle furnace, capable of maintaining the chosen temperature with an accuracy of * 3 C.
42.4.3.1.4 Test specimens
Sheet material shad be tested In a disc form witti a diameter to suite the Internal diameter of the pe and a minimum thickness ci 3mm.
42.4.3.1.5 Test method
The thickness of specimen shall be measured Ic) Pie nearest 0,1 mm at five locations. The five measurements shall be used to obtain the average thidness.
Each specimen shall be placed inside the steel pipe. The specimen shall be totally covered with the weight selected depending on the anticipated expansion pressure of the material. The pipe containing the specimen shall be placed in the preheated muffle furnace for 30 mm, After 30 mm. the steel pipe shall be removed from the muttle furnace and cooled to ambient temperature.
After cooling, the height of the char shall be measured to the nearest 0,1 mm
NOTE This can be accomplished by measuwig the displacement cm the steel weight from its original position.
The expansion factor is the ratio of the expanded thickness to the initial measured thickness.
4.2.4.4 Dle-set pressure test — for covered, skinned or shaped specimens
42.4.4.1 Apparatus
42.4.4.1.1 Oven or muffle furnace, capable of maintaining the chosen temperatures with an accuracy of ±3 C.
42.4.4.1.2 Two piece die set produced with a minimum thermal mass using materials of good thermal conductivity to minimize thermal lag.