Normy

Obsah

ČSN EN ISO 899-1 Tento dokument předepisuje metodu stanovení krípu v tahu plastů ve tvaru standardních zkušebních těles za předepsaných podmínek, jako je předběžná úprava, teplota a vlhkost. Metoda je vhodná pro tuhé a polotuhé nevyztužené, plněné a vlákny vyztužené plastové materiály v podobě zkušebních těles ve tvaru oboustranných lopatek tvářených přímo nebo připravených strojním opracováním z desek nebo výlisků. Metoda je určena k získání údajů pro konstrukční účely, výzkum a vývoj. Údaje pro konstrukční účely vyžadují použití extenzometrů pro měření délky zkušebního tělesa. Údaje pro výzkumné účely a pro kontrolu kvality mo-hou využít změnu délky mezi čelistmi (nominální prodloužení). Kríp v tahu se značně mění změnami v přípravě těles, jejich rozměrů a zkušebního prostředí. Tepelná historie zkušebního tělesa může rovněž mít velký vliv na jeho krípové chování (viz příloha A). V důsledku toho musí být uvedené faktory pečlivě sledovány při požadavku přesných srovnatelných výsledků. Pokud jsou vlastnosti krípu v tahu využívány pro konstrukční účely, mají být příslušné plasty hodnoceny v širokém rozsahu napětí, časů a v různých prostředích.

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ČSN EN 17098-2 This document specifies a method for determining the gas permeability of films using a static technique. This document is applicable to thermoplastic barrier films for agricultural and horticultural soil disinfection using the fumigation technique.

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ČSN EN 438-9 This European Standard specifies performance requirements for alternative core laminates intended for interior use, the core layer compositions of which are not covered by EN 438-3 [1], EN 438-4 [2], EN 438-5 [3], EN 438-6 [4] and EN 438-8 [5]. The core layer types (coloured core layer and metal reinforced core layer) are defined in this part of EN 438. EN 438-2 specifies the test methods relevant to this European Standard.

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ČSN EN ISO 23900-3 This part of ISO 23900 specifies a method of determining in polyethylene (PE) the colouristic properties of a test pigment relative to a standard, and the ease of dispersion DHPE of pigments from the differences in colour strength on dispersing colouring materials under various conditions. Method A is appropriate for use with organic powder pigments and carbon black pigments in powder form, many of which are subject to compaction (reagglomeration under pressure), for inorganic pigments in powder form and for pigment preparations in powder or flake form. Method B is appropriate for testing pigments and pigment preparations in granular form and for inorganic pigments in any form. The ease of dispersion determined in this way is valid only for the dispersion equipment, dispersion conditions and dispersion medium being used. The use of test conditions differing from those specified may give different results; this applies both to the absolute magnitude and to the relation between values of the ease of dispersion of various pigments. The subscript DHPE is therefore used to designate the value obtained as specified in this part of ISO 23900.

Obsah

ČSN EN ISO 23900-2 This part of this ISO 23900 specifies a method of determining the colouristic properties of a test pigment relative to a standard, and the ease of dispersion DHPVC-P of pigments from the differences in colour strength on dispersing colouring materials under various conditions in plasticized polyvinyl chloride (PVC-P) compounds. The method is appropriate for use with organic and inorganic black and colour pigments and for pigment preparations. The ease of dispersion determined in this way is valid only for the dispersion equipment, dispersion conditions and dispersion medium being used. The use of test conditions differing from those specified may give different results; this applies both to the absolute magnitude and to the relation between values of the ease of dispersion of various pigments. The subscript DHPVC-P is therefore used to designate the value obtained as specified in this part of ISO 23900. The principle of this part of ISO 23900 may also be used for routine quality control purposes by reference to the photometric data generated from the sheets milled at 130 °C. For quality control purposes, the ratio of pigment to TiO2 may be agreed between the interested parties. Ratios of 1:10 for organic pigments and 0,2 to 0,5:1 for inorganic pigments are suggested as convenient and widely used standard ratios. Annex A is informative and gives a description of a suitable basic compound.

Obsah

ČSN EN ISO 23900-1 This part of ISO 23900 provides an introduction to the various parts of ISO 23900 which describe methods for dispersing pigments and extenders in plastics materials in order to determine their dispersion characteristics and colouristic properties. Methods of assessing dispersion characteristics are described in the subsequent parts of ISO 23900. The various procedures described permit comparison to be made between similar pigments (for example between a test sample and an agreed reference pigment). The results provide an indication of relative dispersibility under practical conditions of use, provided that the test procedure and plastics material selected are appropriate.

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ČSN 83 8032 Tato norma platí pro navrhování, výstavbu a kontrolu těsnicích systémů skládek odpadů při výstavbě nových skládek i při jejich provozu. Dále platí pro navrhování, výstavbu a kontrolu těsnicích systémů při jejich uzavírání a rekultivaci. Pro návrh těsnicího systému skládky norma stanoví vhodné materiály nebo jejich kombinace i parametry těchto materiálů, pro výstavbu těsnění doporučuje vhodné technologické postupy a pro kontrolu materiálů i zhotoveného těsnění rozsah a metody této kontroly.

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ČSN 83 8035 Tato norma stanoví základní podmínky pro uzavírání a rekultivaci těles a skládek, jejichž technické provedení odpovídá ČSN 83 8030.

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ČSN CLC/TS 61400-14 This part of IEC 61400 gives guidelines for declaring the apparent sound power level and tonality of a batch of wind turbines. The measurement procedures for apparent sound power level and tonality are defined in IEC 61400-11.

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ČSN EN IEC 62677-3-101 This part of IEC 62677 is applicable to heat shrinkable low voltage moulded shapes in a range of configurations suitable for insulation, environmental sealing, mechanical protection, strain relief for power cable terminations, joints and stop ends. These moulded shapes have been found suitable for use for temperatures between -40 C and 100 C. The moulded shapes can be supplied with a pre-coated adhesive. A guide to adhesive compatibility and temperature performance is given in Annex A. The manufacturers/suppliers can be consulted for options. The material is available in two types: Type A - Flame retardant Type B - Not flame retardant Materials which conform to this document meet established levels of performance. However, the selection of a material by a user for a specific application will be based on the actual requirements necessary for adequate performance in that application and will not be based on this document alone. The tests specified are designed to control the quality of the moulded shapes but it is recognized that they are designed to be used in low and medium voltage cable accessories and, as such, electrical performance will be proven as part of the assembly. Examples of this are described in EN 50393, HD 629 and IEC 60502-1.

Obsah

ČSN EN IEC 62677-3-102 This part of IEC 62677 is applicable to heat shrinkable medium voltage moulded shapes in a range of configurations suitable for insulation, environmental sealing, mechanical protection, strain relief for power cable terminations, joints and stop ends. These moulded shapes have been found suitable for use for temperatures between -40 C and 100 C. The moulded shapes can be supplied with a pre-coated adhesive. A guide to adhesive compatibility and temperature performance is given in Annex A. The manufacturers/suppliers can be consulted for options. Materials which conform to this document meet established levels of performance. However, the selection of a material by a user for a specific application will be based on the actual requirements necessary for adequate performance in that application and will not be based on this document alone. The tests specified are designed to control the quality of the moulded shapes but it is recognized that they are designed to be used in low and medium voltage cable accessories and as such electrical performance will be proven as part of the assembly. Examples of this are described in IEC 60502 (all parts), EN 50393 and HD 629.

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ČSN EN 50655-2 Tato norma specifikuje zkušební metody a požadavky na identifikaci (definované v 3.13) teplem smrštitelných komponentů, určených k použití pro elektrickou izolaci a/nebo mechanickou ochranu v příslušenství kabelů pro nízké a střední napětí podle EN 50393, HD 629.1 a HD 629.2.