ISO 4665:2016 pdf free download.Rubber, vulcanized or thermoplastic Resistance to weathering Caoutchouc vulcanisé ou therinoplastique — Résistance aux intempéries.
7.3.2 Instrumental assessment
Measure the colour of the test piece before and after each exposure stage in general accordance with Iso 18314-1. If required, also measure the colour of a file test piece or a masked area.
7.3.3 Visual assessment
Compare the contrast rating of the exposed test piece and an unexposed file test piece, and if required,
a masked area, after each exposure stage, in accordance with the procedure given in ISO 105-A02.
8 Changes in other appearance properties
Examine each test piece visually after each exposure stage for changes In appearance using, if appropriate, the procedure given in a relevant International Standard. Some examples of parameters used to assess change in appearance are listed in Annex B.
Ozone cracking shall be assessed in accordance with ISO 143 1-1.
NOTE Cracking or crazing in rubber test pieces exposed outdoors can result from light ageing as well as from ozone attack. A distinction is not always possible, particularly with light-coloured rubbers. Sunlight crazing is characterized by shallow cracks and usually occurs independently of strain, whereas a threshold strain has to be exceeded for ozone cracking to occur. Where there Is doubt, it is useful to expose an unstrained test piece alongside the strained test piece for comparison.
9 Changes in physical properties
9.1 General
The properties measured may be those specified in an International Standard for the material or as agreed between the interested parties. Some suitable properties are listed in Annex B.
9.2 Apparatus
Apparatus in accordance with the relevant International Standard for the determination of the properties shall be used.
9.3 Test pieces
Test pieces shall comply with the requirements of the relevant International Standard for the determination of the properties chosen.
Test pieces may be cut from an exposed sheet of material. In such cases, the test pieces shall be taken not less than 20 mm from any fixtures holding the material or from supports that are not intended to simulate the conditions of exposure of the material in service. In no circumstances shall any of the material be removed from the exposed face during test piece preparation.
9.4 Procedure
Condition the test pieces and carry out the property determination in accordance with the procedure given in the relevant International Standard. Determine the initial properties on unexposed test pieces and the properties of exposed test pieces after each exposure stage. If required, also determine the properties of file test pieces or masked areas.
Repeat the measurements carried out on the sample test pieces on test pieces from any control being used.
NOTE With some tests, the results will depend on which side of the test piece is exposed. For example, in tests involving bending or flexure, the result depends on whether the exposed or unexposed surface is placed under tension.ISO 4665:2016 pdf free download.
Tags: Rubber, vulcanized or thermoplastic
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ISO 15688-2012 pdf free download.Road construction and maintenance equipment – Soil stabilizers 一 Terminology and commercial specifications. This International Standard establishes the terminology, definitions of operation and commercial specifications for soil stabilizers and their components intended for use in road construction and pavement works. It does not apply to soil stabilizers used in agricultural applications. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.. ISO 3911, Wheels and rims for pneumatic tyres — Vocabulary, designation and marking ISO 6746-1, Earth-moving machinery — Definitions of dimensions and codes — Part 1: Base machine ISO 6746-2, Earth-moving machinery — Definitions of dimensions and codes — Part 2: Equipment and attachments ISO 7134. Earth-moving machinery — Graders — Terminology and commercial specifications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 soil stabilizer self-propelled machine, either towed or transported, with the function of pulverizing, breaking-up, aerating, homogenizing, and loosening existing and imported soil or paving materials and mixing them…
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ISO 18436-1-2012 pdf free.Condition monitoring and diagnostics of machines – Requirements for qualification and assessment of personnel一 Part 1: Requirements for assessment bodies and the assessment process. 5 Requirements for assessment body personnel 5.1 General provisions In order to ensure that the assessment process is carried out effectively and uniformly, the competence requirements for personnel involved in the entire process shall be defined by the assessment body and, in the case of a third party, be approved by the responsible TCC (in accordance with ISO/IEC 17024). The assessment body shall require its personnel (internal or external) to sign a contract, or other document, by which they commit themselves to comply with the rules defined by the assessment body, including those relating to confidentiality and those relating to independence from commercial and other interests, and from any prior or present link with the persons to be examined that would, in the opinion of the interested parties, compromise impartiality. Clearly documented instructions shall be available to the personnel, describing their duties and responsibilities. These instructions shall be maintained up to date. All personnel involved in any aspect of assessment activities shall possess appropriate educational qualifications, experience and technical expertise, which satisfy defined…