Normy

Obsah

ČSN EN ISO 11265 This document specifies an instrumental method for the routine determination of the specific electrical conductivity in an aqueous extract of soil, sludge, biowaste or waste. The determination is carried out to obtain an indication of the content of water-soluble electrolytes in a sample. This document is applicable to all types of air-dried samples of soil, sludge, biowaste and waste.

Obsah

ČSN EN ISO 5832-2 This document specifies the characteristics of, and corresponding test methods for, unalloyed titanium for use in the manufacture of surgical implants. Six grades of titanium based on tensile strength are listed in Table 2. NOTE - The mechanical properties of a sample obtained from a finished product made of this metal do not necessarily conform with those specified in this document.

Obsah

ČSN EN 17984-4 This document defines requirements for the training of assistance dogs. Assistance dogs can be trained by structured programmes/schools, owner-trained under supervision or owner-trainers. Specifically, this document deals with the following topics: - preparation of assistance dogs; - socialization and/or puppy raising of assistance dogs; - training of assistance dogs; - guide dogs; - hearing dogs; - mobility assistance dogs; - Post-Traumatic Stress Disorder (PTSD) assistance dogs; - medical alert/response assistance dogs; - developmental disorder assistance dogs; - multi-purpose assistance dogs.

Obsah

ČSN EN 650 This document specifies the characteristics of floor coverings based on polyvinyl chloride and modifications thereof, on jute or polyester backing or on polyester felt with polyvinyl chloride backing, supplied in either tile or roll form. To encourage the consumer to make an informed choice the document includes a classification system (see EN ISO 10874) based on intensity of use, which shows where these floor coverings give satisfactory service. It also specifies requirements for marking.

Obsah

ČSN EN ISO 32679 This document specifies a test procedure for determination of the size of industrial radiographic gamma sources of 0,5 mm or greater, made from the radionuclides Iridium 192, Ytterbium 169, Selenium 75 or Cobalt 60, by a radiography method with X-rays. The source size of a gamma radiation source is an important factor which affects the image quality of gamma ray images. The source size is determined with an accuracy of ±10 % but typically not better than ±0,1 mm. The source size is provided by the manufacturer as the mechanical dimension of the source insert. A measurement can be required if the manufacturing process is validated or monitored after implementation of the source into the holder. This document can be used for other radionuclides after validation. The standard test method ASTM E1114 provides further information on the measurement of the Ir-192 source size, the characterization of the source shape, and its correct assembly and packaging.

Obsah

ČSN EN ISO 8739 This document specifies the characteristics of parallel grooved pins with pilot point and full-length diamond grooves (with closed-end at the insertion side), in steel and stainless steel, and with nominal diameter 1 mm to 25 mm. These grooved pins are designed to fulfil the main following function: locking together two or more parts, with the easiest installation (due to the pilot point) and a highest level of pull-out resistance (due to the elastic fit behaviour of the pin). The general requirements (including functional principles for grooved pins and assembly) are specified in ISO 13669.

Obsah

ČSN EN ISO 5821 Norma ČSN EN ISO 5821 specifikuje rozměry a tolerance elektrodových čepiček pro odporové bodové svařování kovových materiálů. Rozměry kužele a tolerance elektrodových čepiček odpovídají hodnotám uvedeným v normě ISO 1089. Čepičky elektrod s pojistnými kužely jsou uvedeny v normě ISO 20168. Elektrodové zástrčné čepičky jsou specifikovány v normě ISO 5830.

Obsah

ČSN EN ISO 13971 This International standard describes requirements, design and installation of flexible pipe elements (e.g., metallic flexible pipe, metallic flexible tube, vibration isolator, expansion joint) and non-metallic tube used in the refrigerant circuits of refrigerating systems and heat pumps. It also describes the requirements to qualify the tightness and permeability of non-metallic tubes (e.g., plastic) used in evaporating and/or condensing sides of refrigerating systems and heat pumps. This International standard does not apply to flexible pipes that are only occasionally stressed beyond the elastic limit (e.g., during repair work), or to joints that are free to rotate or hinge.

Obsah

ČSN EN ISO 1120 This document specifies a static test method for measuring the strength of a conveyor belt mechanical fastening; the mechanical joints can be either of the type employing a connecting rod or of a type which does not employ a connecting rod. This document does not cover vulcanized joints. This document is neither applicable to nor valid for light conveyor belts, as described in ISO 21183-1. NOTE - The purpose of the test specified in this document is to eliminate mechanical fastenings of insufficient static strength. It is intended to establish a dynamic test at a later date.

Obsah

ČSN EN 2714-013 This document specifies the characteristics of UV laser printable DR family, single and multicore screened (spiral) and jacketed electrical lightweight cables for use in the on-board electrical systems of aircraft, at operating temperatures between -55 °C and 260 °C. Nevertheless, if needed, -65 °C is also acceptable as shown by cold test. It is also possible to mark these cables by qualified compatible marking. These markings are compliant with EN 3838:2022.

Obsah

ČSN EN IEC 63489 This document specifies the definition of cross-domain product data concepts (classes and properties) in the context of smart manufacturing. This document will be published as a set of concepts within cross-domain data dictionary "General Items (IEC 61360 7)" in the IEC CDD.