Normy

Obsah

ČSN EN ISO 11665-5 This document describes continuous measurement methods for radon-222. It gives indications for continuous measuring of the temporal variations of radon activity concentration in open or confined atmospheres. This document is intended for assessing temporal changes in radon activity concentration in the environment, in public buildings, in homes and in work places, as a function of influence quantities such as ventilation and/or meteorological conditions. The measurement method described is applicable to air samples with radon activity concentration greater than 5 Bq/m3.

Obsah

ČSN EN ISO 11665-6 This document describes radon-222 spot measurement methods. It gives indications for carrying out spot measurements, at the scale of a few minutes at a given place, of the radon activity concentration in open and confined atmospheres. This measurement method is intended for rapid assessment of the radon activity concentration in the air. The result cannot be extrapolated to an annual estimate of the radon activity concentration. This type of measurement is therefore not applicable for assessment of the annual exposure or for determining whether or not to mitigate citizen exposures to radon or radon decay products. The measurement method described is applicable to air samples with radon activity concentration greater than 50 Bq/m3.

Obsah

ČSN EN ISO 19226 This document provides a procedure for the evaluation of irradiation data in the region between the reactor core and the inside surface of the containment vessel, through the pressure vessel and the reactor cavity, between the ends of active fuel assemblies, given the neutron source in the core. The evaluation employs both neutron flux computations and measurement data from in-vessel and cavity dosimetry, as appropriate. This document applies to pressurized water reactors (PWRs), boiling water reactors (BWRs), and pressurized heavy water reactors (PHWRs). This document also provides a procedure for evaluating neutron damage properties at the reactor pressure vessel and internal components of PWRs, BWRs, and PHWRs. Damage properties are focused on atomic displacement damage caused by direct displacements of atoms due to collisions with neutrons and indirect damage caused by gas production, both of which are strongly dependent on the neutron energy spectrum. Therefore, for a given neutron fluence and neutron energy spectrum, calculations of the total accumulated number of atomic displacements are important data to be used for reactor life management.

Obsah

ČSN EN ISO 439 This document specifies a gravimetric method for the determination of the silicon content in steel and cast iron. The method is applicable to silicon contents between 0,10 % (mass fraction) and 5,0 % {mass fraction). NOTE - For samples containing molybdenum, niobium, tantalum, titanium, tungsten, zirconium or high levels of chromium, the results are less accurate than for unalloyed matrixes.

Obsah

ČSN EN ISO 4259-3 This document specifies the methodology for the regular monitoring of the test method precision achieved versus the precision published in the standard test method using data from proficiency testing schemes (PTSs) supported by the regular users of standard test methods. The procedures in this document are designed specifically for proficiency testing (PT) conducted on standard test methods, having a published reproducibility, for petroleum and petroleum-related products, which are presumed to be homogeneous, and where the data distribution is approximately normal. In addition, it is applicable to properties of interest that are (known to be) stable over time and transport. This document specifies the methodology for the statistical comparison of standard deviation under reproducibility conditions achieved in PT programmes versus that published. The purpose of this comparison is to find out if the published reproducibility precision is representative of that achievable by the regular participants in the PT programmes. This document also provides guidance on how to use a PT z-score to monitor an individual participant's performance over time.

Obsah

ČSN EN ISO 12922 This document specifies the minimum requirements of unused fire-resistant and less flammable hydraulic fluids for hydrostatic and hydrodynamic systems in general industrial applications. It is not intended for use in aerospace or power-generation applications, where different requirements apply. It provides guidance for suppliers and end users of these less hazardous fluids and to the manufacturers of hydraulic equipment in which they are used. Of the categories covered by ISO 6743-4, which classifies the different types of fluids used in hydraulic applications, only the following are detailed in this document: HFAE, HFAS, HFB, HFC, HFDR and HFDU. Types HFAE, HFAS, HFB, HFC and HFDR are "fire-resistant" fluids as defined by ISO 5598. Most HFDU fluids, while displaying an improvement in combustion behaviour over mineral oil, fall outside this definition and are more appropriately considered as "less flammable" fluids.

Obsah

ČSN EN ISO 15091 This document specifies a method for determining the electrical conductivity and the electrical resistance of coating materials. The conductivity is usually measured for water-borne paints and varnishes, including electrodeposition coating materials, and the resistance is usually measured for solvent-borne paints and varnishes. If required, the resistivity of the coating material is calculated from either of these measurements. The method is applicable to products having a conductivity less than 5 µS/cm, corresponding to a resistivity greater than 200 kOhm.cm. The conductivity of coating materials influences their processibility in the presence of an electric field. This is particularly important for electrodeposition paints and coating materials which are processed electrostatically.

Obsah

ČSN EN 13230-4+A1 Tato část souboru EN 13230 stanoví dodatečné technické požadavky, zkušební postupy stejně jako specifické mezní tolerance týkající se návrhu a výroby předpjatých pražců pro výhybky a výhybkové konstrukce, přitom délka pražců je maximálně 8,5 m. Výhybkové pražce delší než 8,5 m se považují za zvláštní prvky a podléhají EN 13230-5:2016. Do normy je zapracována změna 1 formou konsolidovaného znění.

Obsah

ČSN EN ISO 13164-2 This part of ISO 13164 specifies a test method for the determination of radon-222 activity concentration in a sample of water following the measurement of its short-lived decay products by direct gamma-spectrometry of the water sample (see Annex A). The radon-222 activity concentrations, which can be measured by this test method utilizing currently available gamma-ray instruments, range from a few becquerels per litre to several hundred thousand becquerels per litre for a 1 l test sample. This test method can be used successfully with drinking water samples. The laboratory is responsible for ensuring the validity of this test method for water samples of untested matrices. Annex B gives indication on the necessary counting conditions to meet the required sensitivity for drinking water monitoring.

Obsah

ČSN EN ISO 11393-4 Tato mezinárodní norma specifikuje požadavky na provedení, zkušební metody, konstrukční požadavky, typy a provedení, informace o identifikaci a značení pro rukavice, které poskytují ochranu proti pořezání ručními řetězovými pilami. Stanoví také měření ochranné plochy, přístrojové vybavení, makety rukou, ergonomické posouzení a zkoušku síly stisku. V příloze A je uvedena analýza a vyhodnocení rizik a návod na výběr rukavic.

Obsah

ČSN EN ISO 21043-2 This document specifies requirements for the forensic process focusing on recognition, recording, collection, transport and storage of items of potential forensic value. It includes requirements for the assessment and examination of scenes but is also applicable to activities that occur within the facility. This document also includes quality requirements. This document is not applicable to procedures for the recovery of data from digital storage media which is covered by ISO/IEC 27037. However, the storage medium itself can yield additional items of forensic value (e.g. fingerprints or DNA). Annex D shows the applicability of this document to the forensic process.

Obsah

ČSN EN ISO 14713-2 Norma uvádí směrnice a doporučení týkající se obecných zásad navrhování výrobků, které mají být po zhotovení žárově zinkovány ponorem za účelem ochrany proti korozi. Neplatí pro povlaky žárového zinku nanesené ponorem kontinuálně na dráty nebo plechy. Ochrana, kterou povlak žárového zinku nanesený ponorem výrobku poskytuje, závisí na způsobu nanášení povlaku, konstrukčním řešení výrobku a specifickém prostředí, kterému je výrobek vystaven. Žárově zinkovaný výrobek lze navíc chránit nanesením dalších povlaků (které nejsou předmětem této normy), např. organických povlaků (nátěrů nebo povlaků z práškových nátěrových hmot). Požadavky specifické pro konkrétní výrobky, pro které mohou existovat specifické normy (např. pro povlaky žárového zinku nanesené ponorem na trubkách nebo spojovacích součástech), mají před těmito obecnými doporučeními přednost.