BS ISO 23529:2016 pdf download – Rubber — General procedures for preparing and conditioning test pieces for physical test methods
1 Scope This document specifies general procedures for the preparation, measurement, marking, storage, and conditioning of rubber test pieces for use in physical tests specified in other International Standards, and the preferred conditions to be used during the tests. Special conditions, applicable to a particular test or material or simulating a particular climatic environment, are not included, nor are special requirements for testing whole products. This document also specifies the requirements for the time interval to be observed between forming and testing of rubber test pieces and products. Such requirements are necessary to obtain reproducible test results and to minimize disagreements between customer and supplier.
2Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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.
ISO 1795, Rubber, raw natural and raw synthetic — Sampling and further preparative procedures
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1382 apply.
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4? Identification? and? record? keeping
Records shall be kept of the identity of each test piece so that it is identifiable with the sample supplied and such that all the relevant details of preparation, storage, conditioning and measurement are traceable to each individual test piece.
Each sample or test piece shall be individually identifiable by marking or segregation at each stage of its preparation and testing. Where marking is used as the method of identification, the markings shall be sufficiently durable to ensure that the test piece or sample remains identifiable until discarded. Where grain effects can be significant, the direction of the grain shall be identified on each sample or test piece.
The method of marking shall not affect the properties of the sample or test piece and shall avoidsignificant surfaces, i.e.surfaces which are to be directly tested ( abrasion tests) or surfaces atwhich a fracture terminates in the test (e.g.tear or tensile tests).
5 Standard laboratory conditions
5.1Standard laboratory temperature
The standard laboratory temperature shall be either (23 ± 2) C or (27 ± 2) °C in accordance withnational practice.If a closer tolerance is required, it shall be ±1 C.
NOTE The temperature 23 C is normally the standard laboratory temperature in temperate countries and27 °C is normally the standard laboratory temperature in tropical and subtropical countries.
5.2Standard laboratory humidity
lf control of both temperature and humidity is necessary, they shall be selected from Table 1.
5.3 Other conditions When control of temperature and humidity is not necessary, the prevailing ambient temperature and humidity can be used. The latter conditions shall be used where standard laboratory conditions cannot easily be achieved.
6 Storage of samples and test pieces
6.1 Samples awaiting the preparation of test pieces and test pieces prior to conditioning shall be stored under conditions which minimize the possibility of degradation by ambient conditions, such as heat or light, or of contamination, e.g. cross-contamination from other samples.
6.2 For all tests, the minimum time between forming the material and testing shall be 16 h. When test pieces are cut from a product or where a whole product, e.g. bridge bearings, is tested, considerably more time than 16 h between forming the material and testing can be necessary. In these cases, the minimum time shall be as given in the product specification or relevant test method.BS ISO 23529 pdf download.