Normy

Obsah

ČSN EN ISO 17639 Tato norma poskytuje doporučení pro přípravu vzorku, zkušební postupy a jejich hlavní záměry při makroskopické a mikroskopické kontrole.

Obsah

ČSN EN ISO 22434 This document specifies requirements for the inspection and maintenance of valves [including ball valves and valves with integrated pressure regulator (VIPRs)] for: a) refillable transportable gas cylinders; b) cylinder bundles; c) pressure drums and tubes; which convey compressed, liquefied or dissolved gases. This document does not apply to valves for liquefied petroleum gas (LPG). NOTE - Where there is no risk of ambiguity, gas cylinders, cylinder bundles, pressure drums and tubes are addressed with the collective term "gas cylinders" within this document. This document is applicable to valves reused at the time of the periodic inspection of gas cylinders, cylinder bundles, pressure drums and tubes, and can be applied at any other time, e.g. at a change of gas service (see ISO 11621). This document does not apply to the routine inspection of valves, e.g. carried out at the time of a gas cylinder filling.

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ČSN EN 3838 This document specifies tests that are to be performed on markings applied by the user to ensure that their durability is satisfactory and that, after application of markings directly to the cable insulation, jacket or sheath, the cable will meet the performance requirements laid down.

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ČSN EN 4261 This document specifies the rules for the drafting and presentation of test method standards.

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ČSN EN 2535 This document specifies the method for depositing cadmium layers according to the vacuum deposition process, for use in aerospace construction. According to this process, cadmium metal is vaporized under vacuum and deposited directly on the base material with an interlayer. The coating produced in this way is ductile and electrically conductive. This document is applicable whenever referenced.

Obsah

ČSN EN IEC 60794-1-220 Tato norma definuje zkušební normu pro stanovení schopnosti optického vláknového kabelu odolávat účinkům řízené solné atmosféry. Norma se týká zemnicích lan s optickými vlákny (OPGW) a fázových vodičů s optickými vlákny (OPPC). Zemnicí lano s optickými vlákny a fázový vodič s optickými vlákny jsou tvořeny několika kovovými vodiči, které jsou vystaveny okolnímu prostředí bez jakéhokoliv izolačního nebo ochranného pláště a obsahují optická vlákna.

Obsah

ČSN EN IEC 63033-2 ed. 2 (36 8609) This part of IEC 63033 specifies recording methods of the surround view system that is specified in IEC 63033-1 in order to view the video file recorded with "free eye point" technology.

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ČSN EN 10250-1 Tento dokument specifikuje obecné technické dodací podmínky pro volně kované výkovky, kované tyče a výrobky předkované a dotvářené na válcovací stolici, určené pro obecné použití. Obecné informace k technickým dodacím podmínkám jsou uvedeny v EN 10021.

Obsah

ČSN EN 17545 This document describes a procedure to gravimetrically determine the physical composition of paper and board for recycling by manually separating/sorting the individual components (including any unwanted materials) and determining the relative masses.

Obsah

ČSN EN ISO 18064 This document establishes a nomenclature system for thermoplastic elastomers based on the chemical composition of the polymer or polymers involved. It specifies symbols and abbreviated terms used to identify thermoplastic elastomers in industry, commerce, and government. It is not intended to conflict with, but to supplement, existing trade names and trademarks. NOTE 1 - The name of the thermoplastic elastomer is intended to be used in technical papers and presentations followed by the abbreviated term used to designate the elastomer in this document. NOTE 2 - Annex A gives thermoplastic-elastomer abbreviated terms that have been used in the past in materials standards, technical bulletins, textbooks, patents, and trade literature.

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ČSN P CEN/TS 17804 This document specifies a method for the detection and enumeration of Enterococcaceae in fertilizers of the following Product Function Categories (PFCs) of EU fertilizing products, as described in Regulation (EU) 2019/1009: - PFC 1(A): Organic fertilizer; - PFC 1(B): Organo-mineral fertilizer; - PFC 1(C): Inorganic fertilizer, which contains more than 1 % by mass of organic carbon, other than organic carbon from chelating or complexing agents, nitrification inhibitors, denitrification inhibitors or urease inhibitors, coating agents, urea or calcium cyanamide. The present method was validated on products known as present on the market in April 2021 and conform to Regulation (EU) 2019/1009 that are inorganic fertilizers with more than 1 % of organic carbon such as poultry manure and struvite with low level of organic matter. In case that other products would be developed having other physical and chemical characteristics, it might become necessary to develop different methods to correctly account for pathogens they might contain. This document specifies a colony-count technique on selective media, Slanetz Bartley agar or Bile Esculin Azide agar, respectively. The method is based on EN ISO 7899-2:2000.

Obsah

ČSN P CEN/TS 17481 This document describes a method for determination of the salt content in bitumen, conventionally expressed in mg of sodium chloride (noted NaCl as from this point of this document) per kg of bitumen. This method is valid for "equivalent NaCl contents" between 20 mg/kg and 500 mg/kg. WARNING - The use of this document may involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.