Introduction:
The BS 476-12 Ignitability Tester is designed according to the
BS476-12:1991. Method of test for ignitability of products by
direct flame impingement.The accuracy of the Ignitability tester
meets the requirements of relevant standards and meets the control
requirements for the accuracy of measurement.
Standards:
BS 476-12:Fire tests on building materials and structures - Part 12: Method
of test for ignitability of products by direct flame impingement
Structure:
1.Voltage:220V + 10%, 50Hz;
2.Burner.
(1)Ignition source D. A gas burner comprising a 185 mm long
horizontal stainless steel tube(12.0 mm outside diameter, 9.0 mm
inside diameter) closed at each end and fitted with a central gas
supply pipe. The burner tube shall have a row of 14 holes of 1.5 mm
diameter at 12.5 mm centres arranged so that the gas jets issue at
an angle of 45 below the horizontal .
The flowmeter shall be calibrated to supply a propane gas flow rate
at 25C of 2 l/min
NOTE: Under these conditions the flame height is approximately 240
mm.
(2)Ignition source E. a gas burner comprising a 185 mm long
horizontal stainless steel tube(12.0 mm outside diameter, 9.0 mm
inside diameter)closed at each end and fitted with a central gas
supply pipe. The burner tube shall have a row of 14 holes of 1. 5
mm diameter at 12.5 mm centres arranged so that the gas jets issue
at an angle of 45 below the horizontal.
3.A burner carriage consisting of a movable column which
incorporates a 10 mm On x 1 mm wall stainless steel tube terminated
by a threaded boss to which the various burners can be fixed.
4.BS 476-12 Ignitability Tester adopts a length of 5 mm internal
diameter hose not greater than 3.0 m in length to connect the
flowmeters to the burner carriage via a gas cock mounted on the
carriage.
5.Test frame. A horizontal steel platform to which a sliding burner
carriage and burner tube are attached. At one end of the platform,
means shall be provided to maintain the specimen holder in a
vertical position.
6.Specimen holder. The vertical specimen holder shall be capable of
accommodating the largest size of specimen Specimens shall be
gripped at intervals along both vertical edges.
For narrower specimens, holders may be designed to fit within the
widest holder in order to provide a common position for testing.
7.Burner carriage and tube. The ignition source shall be mounted on
a burner support tube fitted to the burner carriage(see Figure 1).
The tube shall be equipped with means to allow vertical adjustment
of the ignition source position as required by the various tests.
The burner carriage shall be designed in such a way that the
distance between the burner and the specimen is obtained
accurately. reproducibly and automatically and manufactured so that
the ignition source can be brought into the prescribed position
smoothly and within 1s.
8.BS 476-12 Ignitability Tester has a clamp used to fix the soft
wood.
9. Draught shields. BS 476-12 Ignitability Tester has draught
shields of 9 mm thick non-combustible board, triangular in shape,
with a base of approximately 500 mm and approximately 750 mm in
height shall be provided for use with ignition sources A. B and C.
Gas and air system
1.Gas (prepared by user)
(1)Propane and LPG.
(2)Air supply pipe, compression release valve, safety valve.
2.Air source system (prepared by user)
(1)Compressed air: 0-6kgf
(2)Switch valve and pressure gauge
Technical Parameters
| 1 | Propane flow | 10-1000±5 mL / min |
| 2 | Air flow | 0-100L/min |
| 3 | Burning angle | 45 and 90º |
| 4 | Control | touch screen +PLC control |
| 5 | Test time | 1-99mins arbitrary set |
| 6 | Dimension | Testing Panel:1300*600*2240mm
Control cabinet:500*450*500mm |
