Normy

Obsah

ČSN EN ISO 29463-5 (12 5002) This document specifies the test methods for determining the efficiency of filters at their most penetrating particle size (MPPS). It also gives guidelines for the testing and classification for filters with an MPPS of less than 0,1 µm (Annex B) and filters using media with (charged) synthetic fibres (Annex C). It is intended for use in conjunction with ISO 29463-1, ISO 29463-2, ISO 29463-3 and ISO 29463-4.

Obsah

ČSN EN ISO 14644-9 (12 5301) This document establishes a procedure for the assessment of particle cleanliness levels on solid surfaces in cleanrooms and associated controlled environment applications. Recommendations on testing and measuring methods, as well as information about surface characteristics, are given in Annexes A to D. This document applies to all solid surfaces in cleanrooms and associated controlled environments, such as walls, ceilings, floors, working environments, tools, equipment and products. The procedure for the assessment of surface cleanliness by particle concentration (SCP) is limited to particles of between 0,05 µm and 500 µm. The following issues are not considered in this document: - requirements for the cleanliness and suitability of surfaces for specific processes; - procedures for the cleaning of surfaces; - material characteristics; - references to interactive bonding forces or generation processes that are usually time-dependent and process-dependent; - selection and use of statistical methods for assessment and testing; - other characteristics of particles, such as electrostatic charge, ionic charges and microbiological state.

Obsah

ČSN EN ISO 14644-10 (12 5301) This document establishes appropriate testing processes to determine the cleanliness of surfaces in cleanrooms with regard to the presence of chemical compounds or elements (including molecules, ions, atoms and particles). This document is applicable to all solid surfaces in cleanrooms and associated controlled environments such as walls, ceilings, floors, worksurfaces, tools, equipment and devices. NOTE 1 - For the purpose of this document, consideration is only given to the chemical characteristics of a particle. The physical properties of the particle are not considered and this document does not cover the interaction between the contamination and the surface. NOTE 2 - This document does not include the contamination generation process or any time-dependent influences (e.g. deposition, sedimentation, ageing) or process-dependent activities such as transportation and handling. Neither does it include guidance on statistical quality-control techniques to ensure compliance.

Obsah

ČSN EN ISO 28921-1 This document specifies requirements for design, dimensions, material, fabrication and production testing of gate, globe, ball/plug and butterfly valve design types used as isolation valves and check valves for low-temperature applications. This document is applicable to isolation valves for use in low and cryogenic temperature service where the design low-temperature service is -50 °C down to -196 °C. This document does not apply to valves for cryogenic services, designed in accordance with ISO 21011, used with cryogenic vessels. Where the requirements of this document vary from those given in the valve product standards, the requirements of this document apply. This document is applicable to valves with body, bonnet, bonnet extension or cover made of metallic materials. This document is applicable to: - valves of nominal sizes DN: 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500; 600; 650; 700; 750; 800; 850; 900; 950; 1 000; 1 050; 1 200; 1 350; 1 400; 1 500; 1 600; 1 650; 1 800, - corresponding to nominal pipe sizes NPS: 3/8; 1/2; 3/4; 1; 1 1/4; 1 1/2; 2; 2 1/2; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; 24; 26; 28; 30; 32; 34; 36; 38; 40; 42; 48; 54; 56; 60; 64; 66; 72, and applies to pressure designations: - PN 16; 25; 40; 100; 160; 250; 400, - Class 150; 300; 600; 800; 900; 1 500; 2 500. NOTE - Not all type and size combination are available in all pressure ratings. This document does not apply to safety valves and control valves.

Obsah

ČSN EN ISO 4373 This document specifies the functional requirements of instrumentation for measuring the level of water surface (stage), primarily for the purpose of determining flow rates. This document is supplemented by Annex A, which provides guidance on the types of automatic water level measurement devices currently available and the measurement uncertainty associated with them. The manually operated measuring devices are described in Annex B. This document is applicable to both contact and non-contact methods of measurement. The non-contact methods are not in direct material contact with the water surface but measure the height of the water level with ultrasonic or electromagnetic waves.

Obsah

ČSN EN 16334-1+A1 ! This document specifies the characteristics and the performance requirements of the Passenger Alarm System (PAS). The aim of the PAS is to: - allow passengers, in case of emergency situations, to inform the driver; - allow the driver to keep the train moving or to stop the train at a safe location; - stop the train automatically: a) at a platform, b) if there is no acknowledgement by the driver. This document covers the PAS fitted to passenger carrying rolling stock and specifies: - the functional requirements for an alarm triggered in the driving cab (Clause 6); - the communication channel between the driver and passengers or on-board staff (6.4) - the dynamic analysis of the PAS (Clause 7); - the requirements for the degraded modes management (Clause 8); - the safety related requirements (Clause 9); - requirements for the Passenger Alarm Device (PAD) and PAD area (Clause 10). This document applies to heavy rail rolling stock, which is in the field of the EU Directive 2016/797/EU. This document does not apply to metros, trams and light rail, as defined by the CEN/CENELEC Guide 26. Existing passenger alarm systems may require modification to work in conjunction with vehicles that comply with this document. NOTE - Most of the requirements of UIC 541-6 are compliant with this document. Other communication systems such as "communication device for passengers", "call for aid", "emergency call" or "call for assistance" are covered by the EN 16683 series."

Obsah

ČSN EN IEC 62631-2-2 This part of IEC 62631 specifies test methods for the determination of permittivity and dissipation factor properties of solid insulating materials in a high frequency range from 1 MHz to 300 MHz.

Obsah

ČSN EN IEC 61754-4 ed. 3 Norma specifikuje rozměry normovaných rozhraní pro druh optických konektorů typu SC. Norma obsahuje informativní přílohu A, která obsahuje požadavky na rozměry výřezů zkušebního panelu.

Obsah

ČSN EN IEC 60318-8 Tato norma popisuje akustickou spojku pro zatížení sluchadla nebo vloženého sluchátka se stanovenou akustickou impedancí při zkoušení jeho akustických vlastností v kmitočtovém rozsahu až do 16 kHz. Je vhodná pro sluchadla a sluchátka se vzdušným vedením, spojená s uchem pomocí ušních vložek, ušních tvarovek nebo podobných zařízení. Akustická spojka nesimuluje lidské ucho. Má však účinný objem pouze 0,4 cm3, který je dostatečně malý na to, aby ve spojce nevznikaly významné rezonance v kmitočtovém rozsahu pod 16 kHz. Proto zatíží sluchátko známou akustickou impedancí, což umožňuje získat opakovatelná měření s nízkou nejistotou na sluchátkách používaných při audiometrii v rozšířeném rozsahu vysokých kmitočtů.

Obsah

ČSN EN 17649 (38 6431) This document specifies requirements on the development and implementation of a Safety Management System (SMS) and a Pipeline Integrity Management System (PIMS). The SMS is applicable for system operators of a gas infrastructure. The PIMS is applicable for system operators of gas infrastructure with a maximum operating pressure (MOP) over 16 bar. This document refers to all activities and processes related to safety aspects and performed by system operators of a gas infrastructure, including those activities entrusted to contractors. It includes safety-related provisions on operation of the gas infrastructure. This document is applicable to infrastructure for the conveyance of processed, non-toxic and non-corrosive natural gas according to EN ISO 13686 and gases such as biomethane and hydrogen and to mixtures of these gases with natural gas. This document covers also gases classified as group H, that are to be transmitted, injected into and from storages, distributed and utilized, as specified in EN 16726. For the requirements and test methods for biomethane at the point of entry into a natural gas network, reference is made to EN 16723-1. This document can be applied for gas infrastructure conveying gases of the 3rd gas family as classified in EN 437 or for other gases such as carbon dioxide. Specific requirements for occupational health and safety are excluded from this document. For these, other European and/or international standards, e.g. ISO 45001, apply. This document specifies common basic principles for gas infrastructure. It is important that users of this document are expected to be aware that more detailed national standards and/or codes of practice exist in the CEN member countries. This document is intended to be applied in association with these national standards and/or codes of practice setting out the above-mentioned basic principles. In the event of conflicts in terms of more restrictive requirements in national legislation/regulation with the requirements of this document, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts). NOTE - CEN/TR 13737 (all parts) contains: - clarification of relevant legislation/regulations applicable in a country; - if appropriate, more restrictive national requirements; - national contact points for the latest information.

Obsah

ČSN P CEN/TS 1555-7 Tento dokument poskytuje návod pro posuzování shody směsi, výrobků, spojů a sestav prováděných podle EN 1555 (soubor) a má být součástí plánu kvality výrobce v rámci jeho systému managementu kvality pro stanovení postupů používaných při certifikaci třetí stranou. Společně s částmi 1 až 5 EN 1555 se tento dokument používá pro plastové potrubní systémy z polyethylenu (PE) určené pro rozvod plynných paliv. Používá se pro PE trubky, tvarovky a ventily, jejich spoje a spoje se součástmi z dalších materiálů, které jsou určeny k použití za následujících podmínek: a) nejvyšší provozní přetlak, MOP, do 10 barů včetně 1); b) provozní teplota 20 °C jako referenční teplota.

Obsah

ČSN EN 14805 This document is applicable to sodium chloride intended for on-site electrochlorination of water intended for human consumption using non-membrane technology. It describes the characteristics and specifies the requirements and the corresponding test methods for sodium chloride (see Annex B). It gives information on its use in water treatment.