ISO 12472:2003 木材ドアアセンブリの耐火性-膨張性シールの有効性を判断する方法 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 12472 was prepared by Technical Committee ISO/TC 92, Fire safety, Subcommittee SC 2, Fire containment.

Introduction

This test method has been developed for a number of reasons, the primary one being the recognition of the need to have a repeatable and reproducible test procedure by which the performance of intumescent products can be evaluated, particularly so as to ascertain any change in performance resulting from “real time” ageing.

It is a common requirement under any critical product certification scheme that durability be able to be quantified. There are no recognized accelerated ageing methods suitable for use with intumescent sealing products and, as a consequence, real time ageing tests are carried out. It was considered that over a period of twenty years, manufacturing variations would probably occur on any type of proprietary fire-resisting door. The effect of such variations would be to mask any performance changes. The testing apparatus specified here is capable of being built to reproducible and repeatable specification, which will allow even small variations in performance to be identified.

The fact that the method has eradicated most of the variables, making it repeatable and reproducible, also makes it suitable for quality control purposes. As a quality control test it has the added advantage of heating the intumescent seals in the same manner as they would be in practice; in the case of pressure-forming intumescent materials, the method also allows the pressure-forming characteristics of the materials to be characterized for their shear resistance in a comparative manner. This is not measured by any other known technique.

Finally, because the test heats the specimen in a characteristic way and applies typical movement or shear forces, repeatable product-by-product comparisons can be made. This permits a restricted amount of product interchangeability covering the least onerous door modes and configurations. Even under these conditions, the intumescent material proposed to replace the existing material must itself have been the subject of a full-scale test on another door design, if confidence is to be gained in its performance at large scale.

1 Scope

This International Standard specifies a test method for determining the effective sealing capability of intumescent materials or systems in the context of sealing door–to–frame clearances in timber door assemblies. Intumescent seals extend the duration for which the gap between the leaf edge and the frame will satisfy the integrity criteria of the fire resistance test, and sealing systems can be compared using this method. The method is suitable for evaluating the efficacy of exposed intumescent sealing systems used in conjunction with timber fire resisting doors of up to 1 h fire resistance. It is not suitable for comparing concealed intumescent seals. The results can be applied to proven, single-acting, single-leaf, latched, timber door assemblies of sizes up to that given in the field of direct application.

This International Standard is applicable to timber door assemblies whose intumescent seals have been tested in accordance with ISO 3008 and have satisfied the integrity and — if appropriate — the insulation criterion, whilst incorporating another form of heat-activated seal for a period appropriate to the application. The suitability of any sealing system for use on timber door assemblies of any other configuration (i.e. unlatched single doors, double leaf assemblies etc., or doors constructed of other materials) can only be evaluated by subjecting a full-sized door assembly, complete with seals, to testing in accordance with ISO 3008.

The method does not provide any measure of the ability of the seal to resist the flow of smoke (although a gap that is sealed will provide a reduction in the flow of hot products of combustion) or any information as to the additional protection that could be needed at hardware/ironmongery positions.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 13943 and the following apply.