BS EN 1366-13:2019 pdf free.Fire resistance tests for service installations.
The test shall be made on a test specimen representative of the complete chimney construction on which information is required. The method of fixing or support inside and outside the test furnace shall be representative of that used in practice. The parts of the test specimen can be parts from different manufacturers but they shall have been tested together as a complete system in the fire test. The test specimen shall be arranged as shown in the  orresponding Figures 1 and 2.There is no limit to the number of test specimen that may be tested simultaneously in the same test furnace, provided that there is sufficient space to do so, in accordance with the dimensions shown in the corresponding figures. The maximum separation intended to use in practice shall be provided between the horizontal test specimen and the floor, and if this is not possible, the distance between the horizontal test specimen and the floor shall be at least 500 mm. The distance between the horizontal test chimney and the furnace ceiling shall be at least 500 mm.  There shall be a minimum separation of at least 500 mm between the sides of the horizontal or vertical test chimneys and the test furnace walls. The clearance between single specimens in the test shall be at least 200 mm.Test specimen A does not have any opening inside the test furnace. Cleaning and inspection doors and draught regulators, if part of the system, have to be part of the test specimen inside and outside the test furnace. During the test they are closed.In both vertical and horizontal chimneys the openings shall have the same width to height ratio as the connected flue of the test specimen and the same opening area as the connected flue. Cleaning and inspection doors and draught regulators, if part of the system, may not be taken into consideration inside the test furnace. If cleaning and inspection doors for an inspection opening or draught regulators on different levels are part of the system chimney they have to be tested mounted according to the manufacturers instruction outside of the furnace. If the system has already shown the resistance against soot fire the cleaning and inspection doors for an inspection opening or draught regulators outside the furnace can be omitted.BS EN 1366-13 pdf download.