Strojírenství

Oblast zaměření: Tlakové nádoby
Komise : CEN/TC 54 (Unfired pressure vessels)
Původce: CEN
K připomínkám do: 6.03.2017
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This document (EN 13445-4:2014/prA2:2017) has been prepared by Technical Committee CEN/TC 54 “Unfired pressure vessels”, the secretariat of which is held by BSI.

This document is currently submitted to the CEN Enquiry.

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 2014/68/EU.

For relationship with EU Directive 2014/68/EU, see informative Annex ZA, which is an integral part of EN 13445-4:2014.

Oblast zaměření: Chlazení
Komise : CEN/TC 182 (Refrigerating systems, safety and environmental requirements)
Původce: CEN
K připomínkám do: 16.03.2017
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This European Standard specifies the requirements for material, design, manufacturing, testing and documentation for stationary pressure vessels intended for use in refrigerating systems and heat pumps. These systems are referenced in this standard as refrigerating systems as defined in EN 378-1.

This European Standard applies to vessels, including welded or brazed attachments up to and including the nozzle flanges, screwed, welded or brazed connectors, or to the edge to be welded or brazed at the first circumferential joint connecting piping or other elements.

This European Standard applies to pressure vessels with an internal pressure down to – 1 bar, to account for the evacuation of the vessel prior to charging with refrigerant.

This European Standard applies to both the mechanical loading conditions and thermal conditions as defined in EN 13445-3 associated with refrigerating systems. It applies to pressure vessels subject to the maximum allowable temperatures for which nominal design stresses for materials are derived using EN 13445-2 and EN 13445-3 or as specified in this standard. In addition, vessels designed to this standard should have a maximum allowable temperature not exceeding 150 °C and a maximum design pressure not exceeding 160 bars. Outside of these limits, it is important that EN 13445 be used for the design, construction and inspection of the vessel. Under these circumstances, it is important that the unique nature of refrigerating plant, as indicated in the introduction to this standard, also be taken into account.

It is important that pressure vessels used in refrigerating systems and heat pumps of category less than II as de-fined in Annex H comply with other relevant clauses of EN 378-2 for vessels.

This European Standard applies to pressure vessels where the main pressure bearing parts are manufactured from metallic ductile materials as defined in Clause 4 and Annex I of this standard.

This European Standard does not apply to vessels of the following types:

—    vessels of riveted construction;

—    multi-layered, autofrettaged or prestressed vessels;

—    vessels directly heated by a flame;

—    « roll bond » heat exchangers.

Oblast zaměření: Chlazení
Komise : CEN/TC 182 (Refrigerating systems, safety and environmental requirements)
Původce: CEN
K připomínkám do: 16.03.2017
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1.1     This European Standard specifies the requirements for material, design, manufacturing, testing and documentation for stationary piping intended for use in refrigerating systems, heat pumps and secondary cooling and heating systems. These refrigerating systems and heat pump systems are referenced in this standard as refrigerating systems as defined in EN 378‑1.

1.2     This European Standard applies to piping, including welded or brazed attachments up to and including the flanges, screwed, welded or brazed connectors, or to the edge to be welded or brazed at the first circumferential joint connecting piping or other elements.

1.3     This European Standard applies to the selection, application and installation of safety accessories intended to protect the piping during the various phases of the refrigeration cycle.

1.4     This European Standard applies to the following piping:

—    heat exchanger consisting of piping for the purpose of cooling or heating air where piping aspects are predominant;

—    piping incorporated into an assembly (e.g. self-contained system, condensing unit);

—    field erected piping.

1.5     This European Standard applies to piping with an internal pressure down to – 1 bar, to account for the evacuation of the piping prior to charging with refrigerant.

1.6     This European Standard applies to both the mechanical loading conditions and thermal conditions as defined in EN 13480‑3 associated with refrigerating systems. It applies to piping subject to the maximum allowable temperatures for which nominal design stresses for materials are derived using prEN 14276‑1 or as specified in this European Standard. In addition piping designed to this standard needs to have a maximum design temperature not exceeding 150 °C and a maximum design pressure not exceeding 160 bar. Outside of these limits, EN 13480 should be used for the design construction and inspection of the piping. Under these circumstances, the unique nature of a refrigerating plant, as indicated in the introduction of prEN 14276‑1, needs also to be taken into account.

1.7     This European Standard applies to piping where the main pressure bearing parts are manufactured from metallic ductile materials as defined in Clause 4 and in prEN 14276‑1.

Oblast zaměření: Rozvod vzduchu
Komise : CEN/TC 156 (Ventilation for buildings)
Původce: CEN
K připomínkám do: 3.04.2017
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This European Standard specifies requirements and testing for rating and performance of non- residential Air Handling Units (AHU). It specifies requirements, classifications and testing of components and sections of ventilation units.

For many components and sections it refers to component standards, but it also specifies restrictions or applications of standards developed for stand-alone components.

This European Standard applies to tests in a laboratory and in situ. This European Standard is applicable both for mass produced air handling units and tailor made Air Handling Units.

This European Standard applies to AHU and individual sections of AHU with the designed air flow > 250 m3/h.

NOTE          Units complying with this European Standard can be used in multi dwelling residential buildings.