Normy

Obsah

ČSN EN 10025-6+A1 Tento dokument specifikuje technické dodací podmínky pro ploché a dlouhé výrobky z legovaných ušlechtilých ocelí s vyšší mezí kluzu. Značky ocelí a jakostní stupně jsou uvedeny v tabulkách 1 až 3 (chemické složení) a v tabulkách 4 až 6 (mechanické vlastnosti) a jsou dodávány v zušlechtěném stavu. Oceli uvedené v tomto dokumentu jsou určeny na ploché výrobky válcované za tepla v rozmezí tlouštěk od minimálně 3 mm do maximálně 200 mm včetně, z ocelí S460, S500, S550, S620 a S690, maximální jmenovité tloušťky 125 mm pro oceli S890 a S960 u ocelí, které po zušlechťování mají mez kluzu od 460 MPa do 960 MPa.

Obsah

ČSN EN 13888-2 Tento dokument specifikuje metody pro stanovení charakteristik spárovacích hmot používaných při vnitřní a vnější instalaci keramických obkladových prvků. Tento dokument neobsahuje požadavky na provedení ani doporučení pro návrh a instalaci keramických obkladových prvků. Jsou popsány následující zkušební metody: - Stanovení pevnosti v tahu ohybem a pevnosti v tlaku (9.1); - Stanovení nasákavosti (9.2); - Stanovení smrštění (9.3); - Stanovení odolnosti proti opotřebení (9.4); - Stanovení chemické odolnosti (9.5). Spárovací hmoty pro keramické obkladové prvky lze použít i na jiné druhy obkladů (přírodní a aglomerovaný kámen apod.), pokud nepůsobí nepříznivě na kameny.

Obsah

ČSN ETSI EN 301 489-3 V2.3.2 The present document covers the assessment of Short Range Devices (SRD) operating in the frequency range 9 kHz to 246 GHz in respect of ElectroMagnetic Compatibility (EMC). The present document specifies the applicable test conditions, performance assessment, and performance criteria for Short Range Devices (SRD) and the associated ancillary equipment. The present document applies to the categories of SRD listed in Table 1 with the exception that the present document does not apply to devices for which a product specific harmonised EMC standard is available. NOTE 1 - The entries in Table 1 of the present document are based on the Decision (EU) 2019/1345 [i.1], Table 1. Technical specifications related to the antenna port of radio equipment and radiated emissions from the enclosure port of the radio equipment are not included in the present document. Such technical specifications are normally found in the relevant product standards for the effective use of the radio spectrum. Emissions requirements in the present document are only specified for frequencies above 9 kHz. The environmental classification and the emission and immunity requirements used in the present document are as stated in ETSI EN 301 489 1 [1], except for any special conditions included in the present document. NOTE 2 - The relationship between the present document and essential requirements of article 3.1(b) of Directive 2014/53/EU [i.2] is given in annex A.

Obsah

ČSN EN 1335-1+A1 Tento dokument stanovuje rozměry čtyř typů kancelářských pracovních židlí a zkušební metody pro jejich určení. Tento dokument se nevztahuje na sedací nábytek pro děti, pro který existuje samostatná evropská norma. Příloha A (informativní) obsahuje odůvodnění rozměrů kancelářských židlí. Příloha B (informativní) obsahuje příklad pro objasnění použití tabulky 2. Příloha C (informativní) obsahuje návrhy rozměrů opěrek hlavy. Příloha D (informativní) obsahuje nejistotu měření.

Obsah

ČSN EN ISO 17295 This document provides specifications and illustrations for the positioning and orientation of parts with regards with coordinate systems and testing methodologies for additive manufacturing (AM) technologies in an effort to standardize the method of representation used by AM users, producers, researchers, educators, press/media, and others, particularly when reporting results from testing of parts made on AM systems. Included specifications cover coordinate systems and the location and orientation of parts. It is intended to be in accordance with the principles of ISO 841 and to clarify the specific adaptation of those principles for additive manufacturing.

Obsah

ČSN EN ISO 14581 This document specifies the characteristics of hexalobular socket countersunk flat head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M2 to M10, and with product grade A. If in certain cases other specifications are requested, stainless steel grades can be selected from ISO 3506-1, and dimensional options from ISO 888 or ISO 4753. NOTE 1 - The reduced loadability (related to the countersunk head dimensions in combination with penetration of the hexalobular socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes; see Table 3. NOTE 2 - Hexalobular socket countersunk head screws (high head), with full loadability are specified in ISO 14582, but these products are not interchangeable, because of different head heights. NOTE 3 - Particular attention is needed to ensure alignment of the countersunk head with the bearing surface of the countersink in the assembly.

Obsah

ČSN EN ISO 7380-2 This document specifies the characteristics of hexagon socket button head screws with collar, with reduced loadability due to head design, in steel, with metric coarse pitch threads M3 to M16, and with product grade A. If in certain cases other specifications are requested, dimensional options can be selected from ISO 888 or ISO 4753. NOTE - The reduced loadability (related to the head dimensions in combination with penetration of the hexagon socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes, see Table 4.

Obsah

ČSN EN ISO 7380-1 This document specifies the characteristics of hexagon socket button head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M3 to M16, and with product grade A. If, in certain cases, other specifications are requested, stainless steel grades can be selected from ISO 3506-1, and the dimensional options from ISO 888 or ISO 4753. NOTE - The reduced loadability (related to the head dimensions in combination with penetration of the hexagon socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes, see Table 4.

Obsah

ČSN EN ISO 2702 This document specifies the mechanical and physical properties of heat treated tapping screws made of steel, with thread sizes ST2,2 to ST9,5 in accordance with ISO 1478, when tested at the ambient temperature range of 10 °C to 35 °C, and the related test methods. Tapping screws are designed to form mating threads in sheet metals, without their own threads being deformed. Tapping screws are not intended to be pretensioned by design, even though they can experience varying degrees of low-level tensile stress after installation.

Obsah

ČSN EN 14700 Tento dokument platí pro přídavné a pomocné svařovací materiály pro vytváření tvrdého povlaku. Rozsah použití zahrnuje povrchy nových konstrukčních částí, polotovarů jakož i opravy povrchů konstrukčních částí, které musí odolávat mechanickému, chemickému, tepelnému nebo kombinovanému namáhání. Tento dokument uvádí požadavky pro klasifikaci všech svařovacích materiálů založené na chemickém složení svarového kovu obalených elektrod, plněných elektrod, plněných tyčí, plněných páskových elektrod, spékaných páskových elektrod, spékaných tyčí a kovových prášků a také na chemickém složení plných svařovacích drátů, svařovacích tyčí, páskových elektrod a litých tyčí.

Obsah

ČSN EN 15218 This document specifies the terms, definitions, test conditions, test methods and requirements for rating the performance of air conditioners and liquid chilling packages, with electrically driven compressors and with evaporatively cooled condenser when used for space cooling. The evaporatively cooled condenser is cooled by air and by the evaporation of external additional water. This additional external water is fed by a specific water supply circuit or by a water tank. This document is not applicable to air-to-air and air-to-water air conditioners with a condenser cooled by air and by the evaporation of water condensed on their evaporator. This document is applicable to units equipped with a water tank or with a continuous water circuit supply that can also operate without water feeding. However, this document only concerns the testing of these units with water feeding. This document is applicable to factory-made units which can be ducted. This document is applicable to factory-made units of either fixed capacity or variable capacity by any means. Packaged units, single split and multisplit systems are covered by this document. With regard to units consisting of several parts, this document applies only to those designed and supplied as a complete package. For evaporatively cooled condenser units that can also operate in heating mode, their performance in this mode is determined according to EN 14511:2022 (all parts). Units used for industrial processes cooling are not within the scope of this document. This document specifies the conditions for which performance data will be declared for compliance with the Ecodesign Regulation 206/2012 and with the Energy Labelling Regulation 626/2011 of air conditioners with evaporatively cooled condenser in cooling mode. NOTE - All the symbols given in this text can be used regardless of language.

Obsah

ČSN EN 2235 This document specifies the required characteristics, test methods, qualification and acceptance conditions of single and multicore cables, screened, jacketed and multicore jacketed cables for use in aircraft electrical systems.