ONORM EN 1366-3:2026

Fire resistance tests for service installations - Part 3: Penetration seals (consolidated version)

This part of the EN 1366 series of standards specifies a test method and criteria for assessing (including rules for direct application) the ability of a firestop to maintain the fire resistance of a room-enclosing building component at the point where one or more conduits pass through it. Firestops for perimeter joints around chimneys, ventilation systems, ventilation ducts, service ducts and shafts, as well as smoke extraction ducts and extended combination firestops with a defined fire resistance rating are excluded from this part of the EN 1366 series of standards. NOTE: EN 15882-5 [6] deals with firestops containing ventilation ducts and fire dampers. In this part of the EN 1366 series of standards, load-bearing structures are used as representatives of room-enclosing building components, such as walls and ceilings. These tests simulate the interactions between the test specimen and the building component into which the firestop 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 serves to assess the firestop's integrity and thermal insulation performance, the pipe(s) passing through it, and the building component surrounding the firestop. The test does not provide information on the extent to which the presence of such penetrations and firestops affects the load-bearing capacity of the building component. It is assumed that the lintel above a firestop in the wall is designed in both hot and cold conditions so as not to impose any additional vertical stress on the firestop. The purpose of this test is not to determine quantitative data on the leakage rate of smoke and/or hot gases or the transmission or generation of flue gases. Such observations are only recorded in the test report when describing the general behavior of the test specimens during the test. Tests in accordance with this part of the EN 1366 series of standards do not provide any information on the performance of a firestop in resisting stresses caused by movement or displacement of the pipes through it. The risk of downward fire spread caused by burning material dripping, for example, down a pipe into the floor below, is not currently addressed in this document. The tests performed in accordance with this part of the EN 1366 series of standards do not address risks associated with the release of hazardous liquids or gases due to pipe failure in the event of a fire. Tests performed in accordance with this part of the EN 1366 series of standards for pipe penetrations in pneumatic tube systems, compressed air systems, etc., simulate a situation in which the systems are shut down in the event of a fire. Explanations of this test procedure are given in Annex H. All values in this document without specified limit deviations are nominal values unless otherwise stated. All pipe diameters are outside diameters unless otherwise stated.