Normy

Obsah

ČSN EN 13203-2 This European Standard is applicable to gas-fired appliances producing domestic hot water. It applies to both instantaneous and storage appliances; waters-heaters and combination boilers that have: heat input not exceeding 70 kW, and hot water storage capacity (if any) not exceeding 300 l. In the case of combination boilers, with or without storage, domestic hot water production is integrated or coupled, the whole being marketed as a single unit. This European Standard EN 13203 is formed in two parts, which cover two aspects of domestic hot water production EN 13203-1 sets out in qualitative and quantitative terms the performance in delivery of domestic hot water for a selected variety of uses. It also gives a system for presenting the information to the user. This first part compliments EN 26, EN 89 and EN 625. The present European Standard EN 13203-2 sets out a method for assessing the energy performance of the appliances. It defines a number of daily tapping cycles for each domestic hot water use, kitchen, shower, bath and a combination of these, together with corresponding test procedures, enabling the energy performances of different gas-fired appliances to be compared and matched to the needs of the user.

Obsah

ČSN EN ISO 8980-3 This document specifies requirements for the transmittance properties of uncut and unmounted finished spectacle lenses, including attenuation of solar radiation. This document is not applicable to - spectacle lenses having specific transmittance or absorption characteristics prescribed for medical reasons, - products to which specific personal protective equipment transmittance standards apply, and - products intended for direct observation of the sun, such as for solar-eclipse viewing. NOTE 1 - By reference to ISO 21987 and ISO 14889, this document also applies to lenses mounted in spectacles. NOTE 2 - Optical and geometric requirements are given for uncut finished spectacle lenses in ISO 8980-1 and ISO 8980-2, and for mounted lenses, in ISO 21987.

Obsah

ČSN EN 2349-001 This document specifies the requirements and test procedures of switching devices for use in aircraft electrical systems to EN 2282.

Obsah

ČSN EN IEC 61169-71 This part of IEC 61169, which is a sectional specification (SS), provides information and rules for the preparation of detail specifications (DS) for RF coaxial connector, typically for use in 50 Ohm radio communication systems, type NEX10R. NEX10R is an example of a suitable product available commercially. This information is given for the convenience of users of this document and does not constitute an endorsement by IEC of this product. This document describes mating face dimensions for general purpose connectors (grade 2), dimensional details of standard test connectors (grade 1), gauging information and tests selected from IEC 61169-1, applicable to all detail specifications relating to type NEX10R RF coaxial connectors. This document indicates recommended performance characteristics to be considered when writing a detail specification and it covers test schedules and inspection requirements for assessment levels M and H.

Obsah

ČSN EN IEC 60384-19 ed. 3 This part of IEC 60384 is applicable to fixed surface mount capacitors for direct current, with metallized electrodes and polyethylene-terephthalate dielectric for use in electronic equipment. These capacitors have metallized connecting pads or soldering strips and are intended to be mounted directly onto printed boards or onto substrates for hybrid circuits. These capacitors can have "self-healing properties" depending on conditions of use. They are primarily intended for applications where the AC component is small with respect to the rated voltage. This part of IEC 60384 specifies preferred ratings and characteristics, and selects from IEC 60384-1:2021 the appropriate quality assessment procedures, tests and measuring methods, and gives general performance requirements for this type of capacitor. Test severities and requirements specified in detail specifications referring to this sectional specification are of an equal or higher performance level. Lower performance levels are not permitted. Capacitors for electromagnetic interference suppression are not included, but are covered by IEC 60384-14.

Obsah

ČSN EN IEC 60794-3-40 ed. 2 Tato norma je rodová specifikace, která se vztahuje na kabely a kabelovody pro instalaci zafukováním a/nebo zatahováním v přístupných a nepřístupných dešťových a odpadních kanálech. Systémy sestavené ze součástí, na které se vztahuje tento dokument, podléhají požadavkům dílčí specifikace IEC 60794-3. Konstrukce kabelů a kabelovodů do dešťových a odpadních kanálů musí splňovat různé požadavky společností provozujících kanalizaci a/nebo sdružení, pokud jde o chemické, environmentální, provozní, čisticí a obecně údržbové podmínky. Přednostní použití, popisující vlastnosti kabelů do dešťových a odpadních kanálů v závislosti na způsobech instalace, je uvedeno v příloze A a v příloze B pro nepřístupné kanalizace. Norma obsahuje informativní přílohu A, B a C. Příloha A popisuje kabely do dešťových a odpadních kanálů, příloha B uvádí kabely pro nepřístupné kanály a příloha C uvádí příklady kabelovodů a kabelů.

Obsah

ČSN EN ISO 16638-2 This document specifies the minimum requirements for the design of professional programmes to monitor workers exposed to a risk of ingestion to uranium compounds. This document establishes principles for the development of compatible goals and requirements for monitoring programmes and dose assessment for workers occupationally exposed to internal contamination. It establishes procedures and assumptions for risk analysis, monitoring programmes and the standardized interpretation of monitoring data in order to achieve acceptable levels of reliability for uranium and its compounds. It sets limits for the applicability of the procedures in respect to dose levels above which more sophisticated methods need to be applied. This document addresses those circumstances when exposure could be constrained by either radiological or chemical toxicity concerns. This document addresses, for ingestion of uranium and its compounds, the following items: a) purposes of monitoring and monitoring programmes; b) description of the different categories of monitoring programmes; c) suitable methods for monitoring and criteria for their selection; d) information that is collected for the design of a monitoring programme; e) procedures for dose assessment based on reference levels for special monitoring programmes; f) criteria for determining the significance of monitoring results; g) uncertainties arising from dose assessment and interpretation of bioassays data; h) reporting/documentation; i) quality assurance; j) record keeping requirements. It is not applicable to the following items: a) detailed descriptions of measuring methods and techniques for uranium; b) modelling for the improvement of internal dosimetry; c) potential influence of counter-measures (e.g. administration of chelating agents); d) investigation of the causes or implications of an exposure; e) dosimetry for inhalation exposures and for contaminated wounds.

Obsah

ČSN EN ISO 20031 This document specifies the requirements for personal contamination monitoring and dose assessment following wounds involving radioactive materials. It includes requirements for the direct monitoring at the wound site, monitoring of uptake of radionuclides into the body and assessment of local and systemic doses following the wound event. It does not address: - details of monitoring and assessment methods for specific radionuclides; - monitoring and dose assessment for materials in contact with intact skin or pre-existing wounds, including hot particles; - therapeutic protocols. However, the responsible entity needs to address the requirements for decontamination and decorporation treatments if appropriate.

Obsah

ČSN P CEN ISO/TS 23818-2 This document provides a scheme for the assessment of conformity of RFC products for the rehabilitation of existing pipelines, in accordance with the applicable parts of ISO 11296, ISO 11297 and ISO 11298, and intended to be included in the manufacturer's quality plan as part of the quality management system and for the establishment of certification procedures. It applies to cured-in-place pipe (CIPP) products only. It applies to non-pressure pipe liners, and to independent (fully structural, class A) and interactive (semi-structural, class B) pressure pipe liners, as defined in ISO 11295, which do not rely on adhesion to the existing pipeline. NOTE - In order to help the reader, summary tables of overall scheme requirements are provided in Annex E.

Obsah

ČSN EN 15776 This document specifies requirements for the design, material, manufacturing and testing of cast iron pressure vessels and pressure vessel parts made from materials for which details are specified from the following material standards for specific grades which meet the criterion of an elongation after fracture less than or equal to 15 %: - EN 1561:2011, Founding - Grey cast irons; - EN 1563:2018, Founding - Spheroidal graphite cast irons; - EN 13835:2012, Founding - Austenitic cast irons. The application of this document is limited to pressure equipment and pressure parts containing a fluid of group 2 (non-hazardous fluid) according to the European legislation for pressure equipment.

Obsah

ČSN EN 1097-6 Tento dokument určuje referenční metody pro stanovení objemové hmotnosti zrn a nasákavosti hutného a pórovitého kameniva, používané při zkouškách typu a v případě pochybnosti. V jiných případech, konkrétně při kontrole řízení výroby, se smí použít jiné metody s podmínkou, že jsou vhodné a podobné stanovené referenční metodě. Pro usnadnění jsou některé z těchto jiných metod také popsány v tomto dokumentu.

Obsah

ČSN EN 1366-1+A1 (73 05857 Tato norma specifikuje metodu pro stanovení požární odolnosti svislých a vodorovných vzduchotechnických potrubí včetně takových krytů revizních otvorů, které jsou nedílnou součástí zkoušeného potrubí. Zkouška hod-notí chování potrubí vystaveného požáru z vnějšku (potrubí A) a požáru zevnitř potrubí (potrubí B). Tato norma se užívá ve spojení s EN 1363-1. Tento dokument zahrnuje změnu A1 schválenou CEN dne 2020-06-01. Obecný návod a základní informace jsou uvedeny v příloze A. Tato evropská norma neplatí pro: a) potrubí, jejichž požární odolnost závisí na požární odolnosti podhledu nebo stěny (kde potrubí prochází uzavřenými požárně odolnými šachtami nebo podhledy); b) potrubí obsahující požární klapky v místech, kde procházejí požárně dělicími konstrukcemi; c) jedno-, dvou- nebo třístranná potrubí; d) upevnění závěsných zařízení (např. kotvy) ke stropům nebo stěnám.