Normy

Obsah

ČSN EN ISO 4210-1 ed. 2 This document specifies terms and definitions related to safety and performance requirements for the design, assembly, and testing of bicycles and sub-assemblies having maximum saddle height 635 mm or more. This document does not apply to specialized types of bicycle such as delivery bicycles, recumbent bicycles, tandems, BMX bicycles, and bicycles designed and equipped for use in severe applications such as sanctioned competition events, stunting, or aerobatic manoeuvres. NOTE - For bicycles with a maximum saddle height of 435 mm or less, see national regulations for ride-on toys, and with a maximum saddle height of more than 435 mm and less than 635 mm, see ISO 8098[1].

Obsah

ČSN EN IEC 62631-3-1 ed. 2 This part of IEC 62631 specifies a method of test for the determination of volume resistance and volume resistivity of electrical insulating materials by applying a DC voltage.

Obsah

ČSN EN IEC 60034-18-1 ed. 3 Norma pojednává o obecných směrnicích pro funkční hodnocení elektroizolačních systémů, které jsou používány v točivých elektrických strojích v rozsahu uvedeném v IEC 60034-1, a to s cílem zajištění jejich kvalifikace.

Obsah

ČSN EN 50173-20 Tato norma specifikuje: a) konfigurace kabeláže, které používají komponenty splňující požadavky EN 50173-1, ale neodpovídají struk-tuře univerzální kabeláže stanovené v dokumentech specifických pro dané prostory EN 50173-2 až EN 50173-6; b) požadavky na přenos kanálu a požadavky na vlastnosti prostředí včetně požadavků uvedených v EN 50173-1. POZNÁMKA - Konfigurace v tomto dokumentu nenahrazují řešení univerzální kabeláže podle EN 50173-2, EN 50173-3, EN 50173-4, EN 50173-5 a EN 50173-6. Zkušební postupy pro ověření shody konfigurací symetrické kabeláže s požadavky na přenosové vlastnosti kabeláže podle tohoto dokumentu jsou uvedeny v EN 50697. Požadavky na bezpečnost a elektromagnetickou kompatibilitu (EMC) jsou mimo rozsah tohoto dokumentu a jsou řešeny jinými normami a předpisy.

Obsah

ČSN EN 460 This document gives guidance on the selection of wood and wood-based products for use in situations where they can be subject to degradation by fungi, wood destroying insects or marine borers. This guidance includes information on factors that can influence the service life of a wood or wood-based product when considering biological degradation. In many end uses, design, workmanship and maintenance will also influence the service life of the wood or wood-based product. This document is a step toward the evaluation of the service life of a wood product. This document does not consider: 1) the durability characteristics of the glue used in wood-based products; 2) the aesthetic function of wood products (discoloration, surface weathering, mould).

Obsah

ČSN EN ISO 5263-3 This document specifies an apparatus and the procedures for the laboratory wet disintegration of mechanical pulps that exhibit latency except when brightness is measured. This apparatus and procedure can be used for preparation of the test portion in other International Standards dealing with pulps. This document is applicable to all kind of mechanical pulps (i.e. mechanical, semi-chemical and chemi-mechanical pulps) exhibiting latency.

Obsah

ČSN EN 1186-3 Norma ČSN EN 1186-3 (64 7110) specifikuje metody stanovení celkové migrace materiálů a předmětů z plastu určených pro styk s potravinami kontaktem zkušebních vzorků s odpařitelnými simulanty potravin při teplotách vyšších nebo rovných 4 °C a nepřesahujících teplotu refluxu. Zatímco ČSN EN 1186-3 z ledna 2023 převzala EN 1186-3:2022 schválením k přímému používání jako ČSN oznámením ve Věstníku UNMZ, tato norma ji přejímá překladem.

Obsah

ČSN EN ISO 7784-1 This document specifies a method for determining the resistance to abrasion of coatings, for which two loaded, freely rotatable but eccentrically arranged abrasive-paper covered wheels affect the coating of the rotating test specimen.

Obsah

ČSN EN ISO 7784-2 This document specifies a method for determining the resistance to abrasion of coatings, for which two loaded, freely rotatable but eccentrically arranged abrasive rubber wheels affect the coating of the rotating test specimen.

Obsah

ČSN EN ISO 8536-2 This document specifies the shape, dimensions, material, performance requirements and labelling of closures for infusion bottles as specified in ISO 8536-1. The dimensional requirements are not applicable to barrier-coated closures. Closures specified in this document are intended for single use only. NOTE - The potency, purity, stability and safety of a medicinal product during its manufacture and storage can strongly be affected by the nature and performance of the primary packaging.

Obsah

ČSN EN ISO 24370 This Standard specifies a test method for determining the fracture toughness of monolithic ceramic materials at room temperature by the chevron-notched beam (CNB) method. This Standard is applicable to monolithic ceramics and whisker- or particulate-reinforced ceramics that are regarded as macroscopically homogeneous. It is not applicable to continuous-fibre reinforced ceramic composites. This Standard is usually applicable to ceramic materials with a fracture toughness less than about 12 MPa(m1/2). The test method is applicable to materials with a flat crack-growth resistance curve and may be applicable to materials with a rising crack-growth resistance curve (R-curve).

Obsah

ČSN EN ISO 20509 This Standard describes the method of test for determining the oxidation resistance of non-oxide monolithic ceramics, such as silicon nitride, Sialon1) and silicon carbide at high temperatures. This Standard is intended to provide an assessment of the mass and dimensional changes of test pieces following oxidation at high temperature in an oxidizing atmosphere, and to assess whether oxidation has a significant effect on the subsequent strength. This test method may be used for materials development, quality control, characterization, and design data generation purposes.