ISO 4709:2000 download.Composition cork — Gasket material — Classification system, requirements, sampling, packaging and marking.
ISO 4709 gives a classification system for composition cork intended to be used as gaskets in the mechanical industry. It provides a means for specifying or describing the relevant properties.
Since not all properties that contribute to gasket performance are included, the use of this system is limited to the selection of materials in accordance with specified requirements.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of ISO 4709. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on ISO 4709 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 Intemauonal Standards.
ISO 633. Cork— Vocabulary.
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AOL) for lot-by-lot inspection.
ISO 4708, Composition cork — Gasket material — Test methods.
ISO 7322, Composition cork — Test methods.
ISO 9392, Agglomerated cork discs — Sealing behaviour.
3 Terms and definitions
For the purposes of ISO 4709, the terms and definitions given in ISO 633 apply.
4 Basis of classification
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 ISO 4709 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).
5 Description of the system
5.1 Basic characteristics
5.1.1 The first numeral in the “line call-our is related to the tppe of raw material that is the base of the gasket material: for cork products the number 2 shall be used.
7 Sampling
Test specimens shall be selected from sheets of suitable size. They shall be cut squarely. The grain direction shall be noted by an arrow, whenever possible. See ISO 2859-1 for sampling schemes.
8 Packaging
Composition cork shall be kept in moisture-resistant packages or pallets which ensure transportation without damaging the products until arrival at their destination.
9 Marking
Packages shall show the following information:
a) reference to ISO 4709, i.e. ISO 4709;
b) product designation in accordance with 4.2;
c) manufacturer identification, even if coded;
d) source.