Normy

Obsah

ČSN EN ISO/ASTM 52940 This document specifies the characterization of ceramic slurry for use as feedstock in vat photopolymerization additive manufacturing (AM) processes. The characterization includes the composition and properties of the slurry, such as solids content, dynamic viscosity, particle size distribution, chemical composition, and solid dispersion stability. This document also provides available methods on sampling and preparing slurry samples for testing. This document does not deal with safety aspects.

Obsah

ČSN EN ISO/ASTM 52967 1.1 This practice is intended to be used to assign part classifications across the aviation industries that use AM to produce parts. 1.2 This practice is applicable to all AM technologies defined in ISO/ASTM 52900 used in aviation. 1.3 This practice is intended to be used to establish a metric for AM parts in downstream documents. 1.4 This practice is not intended to establish criteria for any downstream processes, but rather to establish a metric that these processes can use. 1.5 The part classification metric could be utilized by the engineering, procurement, non-destructive inspection, testing, qualification, or certification processes used for AM aviation parts. 1.6 The classification scheme in this practice establishes a consistent methodology to define and communicate the consequence of failure associated with AM aviation parts. 1.7 This practice is not intended to supersede the requirements and definitions of the applicable regulations or policies, including but not limited to the ones listed in Annex A1. 1.8 Tables A.1.1-A.1.3 align the existing regulations and guidance with the four part classes established herein. However, this alignment should not be construed as an alignment of the existing regulations to each other. 1.9 The material or process, or both, in general does not affect the consequence of failure of a part, therefore the classification scheme defined in this document may be used outside AM. 1.10 The user of this standard should not assume regulators' endorsement of this standard as accepted mean of compliance. 1.11 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.12 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ČSN EN ISO 3506-7 This document specifies the mechanical and physical properties of flat washers made of corrosion resistant austenitic, ferritic and duplex stainless steels, designed to be used in bolted joints in combination with bolts, screws, studs and nuts with specified grades and property classes in accordance with ISO 3506-1 and ISO 3506-2. These types of washers are also used with other stainless steel fasteners such as screws forming their own mating thread (see e.g. ISO 3506-4). ISO 3506-6 provides general rules and additional technical information on suitable stainless steels and their properties (detailed properties of stainless steel grades, corrosion behaviour with regards to pitting, crevice and intergranular corrosion, magnetic properties, etc.) WARNING - Washers conforming to the requirements of this document are tested at the ambient temperature range of 10 °C to 35 °C and are used in applications ranging from -20 °C to +150 °C. However, these washers are also used outside this range down to -196 °C and up to +300 °C for specific applications. It is possible that they do not retain the specified mechanical and physical properties at lower and/or elevated temperatures. Therefore, it is the responsibility of the user to determine the appropriate choices based on the service environment conditions of the assembly (see also Clauses 6 and 7). This document applies to the following flat non-captive and captive washers with thickness 0,2 mm to 6 mm (see 5.1): - plain washers and flat washers (with or without knurls, ribs or chamfers), - square washers, - square hole washers, - shaped plates. The term "washer" is used in the following for all types of washers and plates within the scope of this document. This document does not specify requirements for functional properties such as weldability.

Obsah

ČSN EN ISO 17779 Norma ČSN EN ISO 17779 specifikuje požadavky na specifikaci a kvalifikaci postupů tvrdého pájení kovových materiálů. Norma specifikuje požadavky na tvrdé pájení zkušebního tělesa, zkoušení zku-šebního tělesa, základní proměnné a jejich rozsah kvalifikace, kritéria přípustnosti, protokol o kvalifi-kaci postupu tvrdého pájení (BPQR) a specifikaci postupu tvrdého pájení (BPS). Vztahuje se na ná-sledující metody tvrdého pájení podle ISO 857-2 a ISO 4063:2009 s lokálním a globálním ohřevem - 911 Infračervené tvrdé pájení, 912 Plamenové tvrdé pájení, 913 Laserové tvrdé pájení, 914 Elektro-nové tvrdé pájení, 916 Indukční tvrdé pájení, 918 Odporové tvrdé pájení, 919 Difuzní tvrdé pájení, 921 Tvrdé pájení v peci, 922 Tvrdé pájení ve vakuu, 923 Tvrdé pájení v pájecí lázni, 924 Tvrdé pájení v solné lázni, 925 Tvrdé pájení v tavidlové lázni, 926 Tvrdé pájení ponořením a 972 Tvrdé pájení oblou-kovým svařováním. Nevztahuje se na tvrdé pájení pro letecké a kosmické aplikace, pro které platí norma ISO 11745.

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ČSN P CEN/TS 18209 This document specifies the operational procedures and best practices when checking transportation racks for LPG cylinders before and during loading and unloading prior to the vehicles going on the road and at any break during the journey. This document applies to racks containing transportable refillable LPG cylinders of water capacity from 0,5 l up to and including 150 l. This document applies to the following equipment: - rack frame/structure; - rack closures; - rack fixing equipment or accessories on to the vehicle. This document applies to checks performed: - at cylinder filling plants and depots; - or at cylinder manufacturing and/or refurbishment facilities; - or at any place where racks are used or moved. This document also provides guidance and examples for rack maintenance and repair procedures, including rejection criteria and for establishing operational procedures. Transportation racks are also called stillages, pallets or racks (see Clause 3). This document does not cover the design and the manufacturing of racks. This document does not apply to presentation display racks at points of sale.

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ČSN EN 16683 This document covers heavy rail rolling stock. This document does not cover urban rail rolling stock. NOTE 1 - EN 17355 covers communication device requirements for urban rail rolling stock. This document specifies: - the functional requirements for a call for aid system and communication device system; - the dynamic analysis of the call for aid system. NOTE 2 - "Dynamic analysis" is understood here as a sequence of actions. NOTE 3 - In a formation of vehicles where one complies with this document with one that does not, it is possible that the call for aid system is not fully functional. NOTE 4 - The call for aid system function is separate from the Passenger Alarm System (PAS) function, which is provided to deal with emergency situations. The PAS is described in EN 16334-1:2014+A1:2022. NOTE 5 - The communication device system can be different from the PAS, but it can share some or all parts of the PAS to achieve its functionalities. NOTE 6 - The PAS is regarded as a safety relevant system whereas the CFA system and communication device system are non-safety relevant aids to passengers.

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ČSN EN 12082-2 This document is a part of a package of standards: EN 12080, EN 12081, EN 12082-1 and EN 12082-2. This document specifies the principles and methods for deployment of the system of axlebox rolling bearing(s), housing, seal(s) and grease, required for reliable operation of trains on European networks. It covers the conformity assessment with respect to design requirements on the rolling bearing(s) according EN 12080 and grease according EN 12081 as well as the performance of (rig) tests according to EN 12082-1. This document is historically developed for outboard applications with rotating inner rings, but can be used for vehicles with inboard bearing arrangements with rotating inner rings. The present document describes the complete deployment procedure for new axleboxes and it specifies the necessary type and extent of testing. For certain cases and based on a documented risk assessment, a reduced deployment procedure is described. This document only applies to axleboxes equipped with rolling bearings and greases according to EN 12080 and EN 12081. It is not within the scope of EN 12082-2 to specify the technical details of the testing procedures, these are covered by EN 12082-1. It is not within the scope of EN 12082-2 to define the validation procedure of box housings, sleeves or covers from a structural point of view. The relevance of these parts in the scope of this document is limited to the interaction with the axle box rolling bearing with respect to the required service.

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ČSN EN 3043 This document specifies the technical and quality assurance requirements for externally threaded fasteners in material FE-PA92HT (A286) of tensile strength class 900 MPa at room temperature, maximum test temperature of material 650 °C, either manufactured by machining from bar or forging. Primarily for aerospace applications, it is applicable to such externally threaded fasteners when referenced on the product standard or drawing.

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ČSN EN IEC 60153-2 ed. 2 This part of the IEC 60153 specifies straight hollow metallic tubing of ordinary rectangular cross-section for use as waveguides in radio frequency electrical applications. The principal cross-section for such tubing is shown in Figure 1 together with its defining geometrical dimensions. The objective of this document is to specify for hollow metallic waveguides: a) the details necessary to ensure compatibility and, as far as is essential, interchangeability; b) test methods; c) uniform requirements for the electrical and mechanical properties. This document does not contain any binding specifications for the materials to be used, but merely examples. The exact selection of materials is subject to agreement between the customer and the supplier.

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ČSN EN IEC 61189-3-302 This part of IEC 61189 describes a method for the detection of plating defects in unpopulated circuit boards using computed tomography (CT). This document is applicable to non-destructive testing of metallized holes.

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ČSN EN IEC 62933-4-3 This part of IEC 62933 applies to the effects of the environmental conditions on battery-based energy storage systems (BESS). This document addresses these effects and identifies causes, chains of events and final effects on the BESS. Based on those effects, preventative or mitigating measures are described. Typical environmental effects on the BESS include, but are not limited to, the effects of lightning, seismic activities, water, air, flora, fauna, and humans. The described measures focus on the entire BESS including all power and communication connections and their point of connections (POCs).