Normy

Obsah

ČSN EN 2591 This document specifies the general requirements for the micrographic determination of content of non-metallic inclusions of metallic materials for aerospace applications. It also gives tables of standard acceptance criteria for particular steel types. It shall be applied when referred to in the EN technical specification or material standard unless otherwise specified on the drawing, order or inspection schedule. This document is mainly applicable to steel but may be used on other metallic materials. This document is not normally applicable to austenitic corrosion resisting steel, other than precipitation hardening, or to free-machining steel unless invoked in the material standards.

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ČSN EN 2510 This document specifies the requirements relating to: Aluminium alloy 2024-T42 Drawn tubes for structural applications for aerospace applications.

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ČSN EN 2638 This document specifies the requirements relating to: Aluminium alloy 2024-T3 Extruded bar and section 1,2 mm

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ČSN EN 4852 This European standard specifies dimensions and gauging system for external MORTORQ super bolt head spiral drive system.

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ČSN EN 3086 This European standard specifies the designation method for hose assemblies within 15 digits.

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ČSN EN 4867 This European Standard specifies the marking rules for aerospace products, semi-finished products, and ready to use parts, which need surface marking by discoloration using a laser source to identify the part and/or enhance its traceability. This type of marking can be used on a wide range of materials (both metallic and non-metallic) and coatings (paints, varnishes.). It is in line with the part definition.

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ČSN EN IEC 63146 Tento dokument stanovuje požadavky na údajové listy pro LED součástky emitující bílé světlo v aplikacích všeobecného osvětlování. Tento dokument neobsahuje kritéria shody.

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ČSN EN ISO 21484 This document describes a method for determining the Oxygen-to-Metal (O/M) ratio in mixed uranium-plutonium oxide (U,Pu)O2 ± X pellets. The parameters given in the following paragraphs are relevant for pellets within a range of O/M ratio corresponding to 1,98 to 2,01. The method described in the document is adapted, with regard to the parameters, if the expected values of O/M ratio are outside the range.

Obsah

ČSN EN ISO 12800 This document gives guidelines on the determination of the specific surface area of as-fabricated uranium dioxide powder by volumetric or gravimetric determination of the amount of nitrogen adsorbed on the powder, and can be applied to other similar materials, e.g. U3O8, UO2-PuO2 powders, and other bodies with similar surface areas, e.g. powder granules or green pellets, provided that the conditions described are fulfilled. Modifications using other adsorbing gases are included. The method is relevant as long as the expected value is in the range between 1 m2/g and 10 m2/g.

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ČSN EN ISO 12799 This International Standard describes a procedure for measuring the nitrogen content of UO2, (U,Gd)O2, and (U,Pu)O2 pellets. Nitrogen in nuclear fuel may be present either as elemental nitrogen or chemically combined in the form of nitrogenous compounds. The technique described herein serves to determine the total content of nitrogen excluding those compounds whose decomposition temperature is above 2 200 °C (most notably Pu and U nitrides).

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ČSN EN ISO 9202 This document specifies a range of fineness of precious metal alloys (excluding solders) recommended for use in the field of jewellery. NOTE There is a possibility that national legal requirements for the designation, marking, and stamping of finished articles exist in the respective countries.

Obsah

ČSN EN 17085 This document specifies a method of obtaining representative samples from a lot of paper and board for recycling for testing to determine whether or not its composition and quality comply with the requirements of EN 643 and/or other specifications. This document also specifies the positioning of probes, when in situ measurements are performed. It defines the sampling procedures which apply when sampling is carried out to resolve compliance issues and commercial disputes between buyer and seller relating to a lot of paper and board for recycling, at any point in the value chain, where those procedures are not defined in the contract between buyer and seller. This document is not specifically intended for routine monitoring of processes or quality, but the procedures described may be used to form the basis of an agreement between supplier and buyer. This document is not applicable if the material is not intended for recycling. The method is not intended for determining the variability within a lot, however, the general sampling principles can be applied.