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23 Fluid systems and components for general use
New standards
EVS-EN IEC 61514:2026
Industrial-process control systems - Methods of evaluating the performance of valve positioners with pneumatic outputs
Scope: This International Standard specifies tests designed to determine the static and dynamic performance of single-acting or double-acting analogue positioners. The tests apply to positioners which receive standard analogue input signals (as specified in IEC 60381-1, IEC 60381-2 and IEC 60382) and have a pneumatic output.
Positioners with pulsed or digital input signals, positioners with digital controllers and positioners with pulsed outputs are outside the scope of this document.
Testing is conducted either on a positioner alone, independently of an actuator, or on a positioner mounted and connected to a specific actuator, as a combined unit. The text makes clear where different approaches are required.
The methods of evaluation given in this document are intended for use by manufacturers to determine the performance of their products, and by users, or independent testing establishments, to verify manufacturers' performance specifications.
The closest liaison between the evaluating body and the manufacturer is indispensable during the tests, including the possibility for the manufacturer to influence the test programme based on the manufacturer's specifications for the instrument and comment on both the test programme and the results.
This document is intended to provide definitions of positioner elements, actions, and characteristics, to specify uniform methods of measuring performance errors and effects of influence quantities on those characteristics, and to describe methods of reporting and evaluating the results of the measurement data obtained.
The test conditions described in this publication (for example range of ambient temperatures and power supply) relate to conditions which commonly arise in use. Consequently, the values specified are used where no other values are specified by the manufacturer or user. If other values are used, they will be stated. It is recognized that the manufacturer's specifications and instructions for installation and operation apply during all steps.
The tests specified in this document are not necessarily sufficient for instruments specifically designed for unusually arduous conditions. Conversely, a reduced series of tests can serve adequately for instruments designed to perform within a more limited range of conditions.
When a full evaluation, in accordance with this document, is not required or possible, only the tests which are required are performed and the results reported in accordance with the relevant parts of this document. In such cases, the test report will state that it does not cover the full number of tests specified herein.
Positioners with pulsed or digital input signals, positioners with digital controllers and positioners with pulsed outputs are outside the scope of this document.
Testing is conducted either on a positioner alone, independently of an actuator, or on a positioner mounted and connected to a specific actuator, as a combined unit. The text makes clear where different approaches are required.
The methods of evaluation given in this document are intended for use by manufacturers to determine the performance of their products, and by users, or independent testing establishments, to verify manufacturers' performance specifications.
The closest liaison between the evaluating body and the manufacturer is indispensable during the tests, including the possibility for the manufacturer to influence the test programme based on the manufacturer's specifications for the instrument and comment on both the test programme and the results.
This document is intended to provide definitions of positioner elements, actions, and characteristics, to specify uniform methods of measuring performance errors and effects of influence quantities on those characteristics, and to describe methods of reporting and evaluating the results of the measurement data obtained.
The test conditions described in this publication (for example range of ambient temperatures and power supply) relate to conditions which commonly arise in use. Consequently, the values specified are used where no other values are specified by the manufacturer or user. If other values are used, they will be stated. It is recognized that the manufacturer's specifications and instructions for installation and operation apply during all steps.
The tests specified in this document are not necessarily sufficient for instruments specifically designed for unusually arduous conditions. Conversely, a reduced series of tests can serve adequately for instruments designed to perform within a more limited range of conditions.
When a full evaluation, in accordance with this document, is not required or possible, only the tests which are required are performed and the results reported in accordance with the relevant parts of this document. In such cases, the test report will state that it does not cover the full number of tests specified herein.
Base documents: IEC 61514:2026; EN IEC 61514:2026
Replaces: EVS-EN 61514:2003
ISO 3567:2026
Vacuum gauges — Calibration by direct comparison with a reference gauge
Scope: This document specifies the physical, technical and metrological conditions to be fulfilled when calibrations of vacuum gauges are performed by direct comparison with a reference gauge at a calibration laboratory, whether accredited or not. From the conditions described, the design of an apparatus that can perform vacuum gauge calibrations in an adequate manner can be deduced.
This document is applicable for calibration of all types of vacuum gauges. Vacuum gauges can consist of several parts; typically, these are: gauge head, cable, and control unit. This entire set is considered as the unit to be calibrated. If only the gauge head (i.e. the part of the vacuum gauge directly exposed to the vacuum) is calibrated, all set-ups and conditions are recorded such that the user of the calibrated gauge head is able to perform the measurements in the same manner as during the calibration.
This document does not give guidance on how to treat special types of vacuum gauges, be they reference standards or units under calibration.
The applicable pressure range for calibrations treated in this document depends on the realized design of the calibration apparatus and on the type of reference gauge, and the range varies in its limits from 10−6 Pa to 133 kPa.
This document is applicable for calibration of all types of vacuum gauges. Vacuum gauges can consist of several parts; typically, these are: gauge head, cable, and control unit. This entire set is considered as the unit to be calibrated. If only the gauge head (i.e. the part of the vacuum gauge directly exposed to the vacuum) is calibrated, all set-ups and conditions are recorded such that the user of the calibrated gauge head is able to perform the measurements in the same manner as during the calibration.
This document does not give guidance on how to treat special types of vacuum gauges, be they reference standards or units under calibration.
The applicable pressure range for calibrations treated in this document depends on the realized design of the calibration apparatus and on the type of reference gauge, and the range varies in its limits from 10−6 Pa to 133 kPa.
Base documents:
Replaces: ISO 3567:2011
IEC 60335-2-40:2024/AMD1:2026
Amendment 1 - Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
Scope:
Base documents:
IEC 60335-2-40:2024+AMD1:2026 CSV
Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
Scope: IEC 60335-2-40:2024+AMD1:2026 CSV deals with the safety of electric heat pumps, sanitary hot water heat pumps and air conditioners, incorporating motor-compressors as well as hydronic fan coils units, dehumidifiers (with or without motor-compressors), thermoelectric heat pumps and partial units, their maximum rated voltage being not more than 300 V for single phase appliances and 600 V for other appliances including direct current (DC) supplied appliances and battery-operated appliances. Appliances not intended for normal household use but which nevertheless can be a source of danger to the public, such as appliances intended to be used by laypersons in shops, in light industry and on farms, are within the scope of this standard. The appliances referenced above can consist of one or more factory-made assemblies. If provided in more than one assembly, the separate assemblies are used together, and the requirements are based on the use of matched assemblies. A definition of ‘motor-compressor’ is given in IEC 60335-2-34, which includes the statement that the term motor-compressor is used to designate either a hermetic motor-compressor or semi-hermetic motor-compressor. Requirements for containers intended for storage of the heated water included in sanitary hot water heat pumps are, in addition, covered by IEC 60335-2-21. This standard does not take into account refrigerants other than group A1, A2L, A2 and A3 as defined by ISO 817. Flammable refrigerants are limited to those of a molar mass of more than or equal to 42 kg/kmol based on WCF (worst case formulation) as specified in ISO 817. As far as practical, this standard deals with common hazards presented by appliances that are encountered in normal use and assumes that installation, servicing, decommissioning, and disposal are safely handled by competent persons and accidental release of refrigerants is avoided. However, it does not specify the criteria to ensure competence of persons during installation, servicing and disposal. Safety requirements during disposal are not specified in this standard. Annex HH provides informative requirements on competence of personnel. Criteria for competence of personnel for the purpose of certification schemes can be found in ISO 22712.
Unless specifications are covered by this standard, including the annexes, requirements for refrigerating safety are covered by:
– ISO 5149-1:2014, ISO 5149-1:2014/AMD1:2015, and ISO 5149-1:2014/AMD2:2021,
– ISO 5149-2:2014 and ISO 5149-2:2014/AMD1:2020,
– ISO 5149-3:2014 and ISO 5149-3:2014/AMD1:2021.
Supplementary heaters, or a provision for their separate installation, are within the scope of this standard, but only heaters which are designed as a part of the appliance package, the controls being incorporated in the appliance.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on-board ships or aircraft, additional requirements can be necessary;
– in many countries, additional requirements are specified, for example, by the national health authorities responsible for the protection of labour and the national authorities responsible for storage, transportation, building constructions and installations.
This standard does not apply to
– humidifiers intended for use with heating and cooling equipment (IEC 60335-2-88);
– appliances designed exclusively for industrial processing;
– appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas).
This eighth edition cancels and replaces the seventh edition published in 2022. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Clause 12 : Part 1, Clause 12 has been made applicable;
b) Clause 19: requirement added for double wall heat exchangers to be resistant against freezing;
c) Clause 20: requirement modified for when to apply test probe 18;
d) Clause 21: requirement added for double wall heat exchangers to resistant against the pressure of the refrigerant if one of the walls fails;
e) Clause 22: requirement modified to reflect that appliances can operate continuously and can be operated remotely without giving rise to a hazard, and requirement added for double wall heat exchangers to be constructed to avoid refrigerant leaking into the secondary circuit;
f) Annex LL has been deleted and replaced by a reference to IEC TS 63542:2024.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its amendments unless that edition precludes it; in that case, the latest edition that does not preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
Unless specifications are covered by this standard, including the annexes, requirements for refrigerating safety are covered by:
– ISO 5149-1:2014, ISO 5149-1:2014/AMD1:2015, and ISO 5149-1:2014/AMD2:2021,
– ISO 5149-2:2014 and ISO 5149-2:2014/AMD1:2020,
– ISO 5149-3:2014 and ISO 5149-3:2014/AMD1:2021.
Supplementary heaters, or a provision for their separate installation, are within the scope of this standard, but only heaters which are designed as a part of the appliance package, the controls being incorporated in the appliance.
Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on-board ships or aircraft, additional requirements can be necessary;
– in many countries, additional requirements are specified, for example, by the national health authorities responsible for the protection of labour and the national authorities responsible for storage, transportation, building constructions and installations.
This standard does not apply to
– humidifiers intended for use with heating and cooling equipment (IEC 60335-2-88);
– appliances designed exclusively for industrial processing;
– appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas).
This eighth edition cancels and replaces the seventh edition published in 2022. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Clause 12 : Part 1, Clause 12 has been made applicable;
b) Clause 19: requirement added for double wall heat exchangers to be resistant against freezing;
c) Clause 20: requirement modified for when to apply test probe 18;
d) Clause 21: requirement added for double wall heat exchangers to resistant against the pressure of the refrigerant if one of the walls fails;
e) Clause 22: requirement modified to reflect that appliances can operate continuously and can be operated remotely without giving rise to a hazard, and requirement added for double wall heat exchangers to be constructed to avoid refrigerant leaking into the secondary circuit;
f) Annex LL has been deleted and replaced by a reference to IEC TS 63542:2024.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its amendments unless that edition precludes it; in that case, the latest edition that does not preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
Base documents:
Replaced standards
EVS-EN 10253-1:2000
Butt welding pipe fittings - Part 1: Wrought carbon steel for general use and without specific inspection requirements
Scope: This European Standard specifies requirements for steel butt-welding fittings (elbows and return bends, concentric and eccentric reducers, equal and reducing tees, dished ends and caps) made of wrought carbon steel and delivered without specific inspection.
It specifies the steel grades and its chemical composition; the mechanical charateristics; the dimensions and tolerances; the technical conditions for inspection and testing; the marking, packaging and inspection documents
It specifies the steel grades and its chemical composition; the mechanical charateristics; the dimensions and tolerances; the technical conditions for inspection and testing; the marking, packaging and inspection documents
Base documents: EN 10253-1:1999
Replaced: EVS-EN 10253-1:2026
ISO 3567:2011
Vacuum gauges -- Calibration by direct comparison with a reference gauge
Scope:
Base documents:
Replaced: ISO 3567:2026
EVS-EN 588-1:1999
Fibre-cement pipes for sewer and drains - Part 1: Pipes, joints and fittings for gravity systems
Scope: This part 1 of EN 588 specifies requirements for fibre-cement pipes, joints and fittings suitable for gravity systems at atmospheric pressure intended for sewerage and drainage applications. It is applicable only to the more commonly used fittings i.e. angled branches or tees and bends. It defines general composition, classification, geometrical, mechanical and physical characteristics, acceptance tests and type tests.
Base documents: EN 588-1:1996
EVS-EN 61514:2003
Industrial-process control systems - Methods of evaluating the performance of valve positioners with pneumatic outputs
Scope: This European Standard specifies tests designed to determine the static and dynamic performance of single-acting or double-acting analogue positioners. The tests may be applied to positioners, which
receive standard analogue input signals (as specified in IEC 60381 and IEC 60382) and have a pneumatic output. Positioners with pulsed or digital input signals, positioners with digital controllers and positioners with pulsed outputs are outside the scope of this standard.
receive standard analogue input signals (as specified in IEC 60381 and IEC 60382) and have a pneumatic output. Positioners with pulsed or digital input signals, positioners with digital controllers and positioners with pulsed outputs are outside the scope of this standard.
Base documents: IEC 61514:2000; EN 61514:2002
Replaced: EVS-EN IEC 61514:2026
Drafts
prEN 489-1
District heating pipes - Bonded single and twin pipe systems for buried hot and coldwater networks - Part 1: Joint casing assemblies and thermal insulation for hot and cold-water networks with metal service pipes in accordance with EN 13941-series.
Scope: This document specifies requirements and test methods for joint casing systems for single and twin pipes between adjacent factory-made pipe, and/or fitting and/or valve assemblies for buried heating and cooling water networks with rigid pipe systems with metal service pipes in accordance with EN 13941-1 [4] and EN 13941-2 [5] as well as rigid pipe systems with plastic service pipes according to series EN 17415 and flexible pipe systems with metal service pipes according to EN 15632-4 .
NOTE There are no differences in requirements for single and twin pipe joint casing systems.
For bedding materials other than those defined in 5.2.3 additional precautions are defined inEN 13941-2 [5].
NOTE There are no differences in requirements for single and twin pipe joint casing systems.
For bedding materials other than those defined in 5.2.3 additional precautions are defined inEN 13941-2 [5].
Base documents: prEN 489-1
prEN 18397
Properties of carbon dioxide streams in carbon steel pipelines
Scope: This document specifies requirements for the composition of CO2 streams relevant to the integrity of carbon steel pipeline systems, including limits on non-condensable components. It establishes the framework conditions for the supply, transportation and distribution of CO2 streams. Considerations related to the health effects of the CO2 stream (e.g. toxicity), environmental impact, or other properties of impurities are outside the scope of this document.
Base documents: prEN 18397