ISO 4709:2000 pdf download – Composition cork — Gasket material — Classification system, requirements, sampling, packaging and marking.
2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 633, Cork— Vocabulary. ISO 2859-1 , Sampling procedures for inspection by attributes —Part1: Sampling schemes indexed by acceptance quality limit(AQL) forlot-by-lotinspection. ISO 4708, Composition cork— Gasketmaterial—Test methods. ISO 7322, Composition cork— Testmethods. ISO 9392, Agglomeratedcorkdiscs — Sealing behaviour.
4.1.2 This classification system is versatile enough to also cover new materials and test methods as they are introduced. It is based on the principle that non-metallic gasket materials should be described, as far as possible, in terms of specific physical and mechanical properties and that an infinite number of such descriptions can be formulated by using one or more statements, based on tests. 4.1.3 Users of gasket materials may, by selecting different combinations of different statements, specify different combinations of desired properties. Suppliers may, likewise, report properties available in their respective products. 4.2 Significance of the system 4.2.1 This classification system establishes letter or number symbols or both (“line call-out”) for various performance levels of each property or characteristic (see clause 5). 4.2.2 Various levels of specification or description may be established by increasing or decreasing the number of letter-numeral symbols used in the “line call-out”. 4.2.3 The specification or description of gasket materials, in this system, shall include a reference to this International Standard followed by six numerals, e.g. ISO 4709 (220340). 4.2.4 Each numeral represents one characteristic (see clause 5). 4.2.5 The numeral “0” is used when the description of any characteristic is not desired. 4.2.6 The numeral “9” is used when the description of any characteristic is specified by some supplement to this classification system, such as engineering drawings. 4.2.7 To specify or describe gasket materials further, each “line call-out” may include one or more suffix letter- numeral symbols (see Table 1 ).