ONORM EN 1366-3:2025

Fire resistance tests for service installations - Part 3: Penetration seals

This part of the EN 1366 series specifies a test method and criteria for assessing (including rules for direct application) the ability of a penetration seal to maintain the fire resistance of a separating element at the point where one or more services pass through it. Penetration seals for perimeter joints around chimneys, ventilation systems, ventilation ducts, service ducts and shafts, as well as smoke extraction ducts and extended combination penetration seals with a defined fire resistance duration are excluded from this part of the EN 1366 series. NOTE: EN 15882-5 [6] deals with penetration seals containing ventilation ducts and fire dampers. In this part of the EN 1366 series, supporting structures are used as representatives for separating elements, such as walls and ceilings. These simulate the interactions between the test specimen and the separating component into which the penetration seal is to be installed in practice. This part of the EN 1366 series of standards is intended for use in conjunction with EN 1363-1. The test described in this part of the EN 1366 series of standards serves to assess the integrity and thermal insulation performance of the penetration seal, the continuous pipe(s), and the separating component around the penetration seal. The test does not provide any information about the extent to which the presence of such penetrations and seals influences the load-bearing capacity of the separating component. It is assumed that the lintel above a penetration seal in the wall is designed in all cases, in both the hot and cold states, so that it does not impose additional vertical loads on the seal. The purpose of this test is not to provide quantitative information on the leakage rate of smoke and/or hot gases or the transmission or generation of smoke gases. Such observations are only recorded in the test report when describing the general behavior of the test specimens during testing. Tests carried out in accordance with this part of the EN 1366 series do not provide information on the performance of a penetration seal to resist stresses induced by movement or displacement of the services passing through it. The risk of downward fire spread caused, for example, by burning material dripping down a pipe into the storey below is not currently addressed in this document. Tests performed in accordance with this part of the EN 1366 series do not address risks associated with the release of dangerous liquids or gases due to pipe failure in the event of fire. Tests performed in accordance with this part of the EN 1366 series of pipe penetration seals for pneumatic tube systems, compressed air systems, etc., simulate a situation in which the systems are shut down in the event of fire. Explanations for this test method are given in Annex H. All values without specified tolerances in this document are nominal values unless otherwise stated. All pipe diameters are outside diameters unless otherwise stated.