EN ISO 1182:2020 pdf download.Reaction to fire tests for products – Non-combustibility test [ISO 1182:2020).
The furnace tube shall be fitted in the centre of a surround made of insulating material 150 mm in height and of 10 mm wall thickness, and fitted with top and bottom plates recessed internally to locate the ends of the furnace tube. The annular space between the tubes shall be filled with a suitable insulating material.
NOTE 1 An example of a typical furnace tube design is given in 112.
An open-ended cone-shaped airflow stabilizer shall be attached to the underside of the furnace. The stabilizer shall be 500 mm in length, and reduce uniformly from 75 ± 1 mm internal diameter at the top to 10 ± 0,5 mm at the bottom. The stabilizer shall be manufactured from 1 mm-thick sheet steel, with a smooth finish on the inside. The joint between the stabilizer and the furnace shall be a close, airtight fit, with a smooth finish internally. The upper half of the stabilizer shall be insulated externally with a suitable insulating material.
NOTE 2 An example of suitable insulating material is given in 113.
4.2.2 Draught shield, made of the same material as the stabilizer cone, and provided at the top of the furnace. It shall be 50 mm high and have an internal diameter of (75 ± 1) mm. The draught shield and its joint with the top of the furnace shall have a smooth finish internally, and the exterior shall be insulated with a suitable insulating material.
NOTE An example of suitable insulating material is given in BA.
4.2.3 Stand, firm and horizontal, on which the assembly of the furnace, stabilizer cone and draught shield are mounted. There shall be a base and draught screen attached to the stand to reduce draughts around the bottom of the stabilizer cone. The draught screen shall be 550 mm high and the bottom of the stabilizer cone shall be 250 mm above the base plate.
4.3 Specimen holder and insertion device
4.3.1 Specimen holder, as specified in Figure 1 and made of nickel/chromium or heat-resisting steel wire. A fine metal gauze tray of heat-resisting steel shall be placed in the bottom of the holder. The mass of the holder shall be (15 ± 2) g.
Due to ageing, specimen holders can lose weight. The mass of the holder shall be regularly checked.
4.3.2 InsertIon device, suitable for lowering the specimen holder precisely down the axis of the furnace tube smoothly and carefully, such that the geometric centre of the specimen is located rigidly at the geometric centre of the furnace during the test. The insertion device shall consist of a metallic sliding rod moving freely within a vertical guide fitted to the side of the furnace.
The specimen holder for loose fill materials shall be cylindrical and of the same outer dimensions as the specimen (see Sd), and made of a fine metal wire gauze of heat-resisting steel similar to the wire gauze used at the bottom of the normal holder specified in 431. The specimen holder shall have an open end at the top. The mass of the holder shall not exceed 30 g.
4.4 Thermocouples, with a wire diameter of 0,3 mm and an outer diameter of 1,5 mm. The hot junction shall be insulated and not earthed. The thermocouples shall be of either type K or type N. They shall be of tolerance class I in accordance with IEC 60584-1. The sheathing material shall he either stainless steel or a nickel-based alloy. All new thermocouples shall be artificially aged before use to reduce reflectivity
NOTE A suitable method of ageing is to run a test without any test specimen inserted for I h.
The two furnace thermocouples, TC1 and TC2. shall be located with each of their hot junctions (10 ± 0,5) mm from the tube wall and at a height corresponding to the geometric centre of the furnace tube (see Figure 2). In the upper picture of Figure 2. the two furnace thermocouples (key 8 and 9) are inserted in this plane to indicate the dimensions, i.e. the distances to the furnace wall and the specimen surface, but are not located in this plane. The position of the furnace thermocouples in relation to each other and to the surface thermocouple can be seen in the lower drawing of Figure 2. The correct position of the thermocouple shall be maintained with the help of a guide attached to the draught shield.
The position of the thermocouples shall be set using the locating guide illustrated in Figure 3. The length of the furnace thermocouple outside the guide shall be (40 ± 5) mm.
The furnace thermocouples shall be initially calibrated at 750 °C. Any correction term received at the calibration shall be added to the output.
The furnace thermocouples shall be replaced after 200 test runs.
Details of any additional thermocouples required and their positioning are given in Annex C. The use of these two thermocouples is optional.
4.5 Thermal sensor, made of a thermocouple of the type specified in 4.4. brazed to a copper cylinder of diameter (10 ± 0,2) mm and height (15 ± 0,2) mm. The hot junction shall be at the geometrical centre of the copper cylinder.EN ISO 1182 pdf download.