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This document specifies minimum requirements applicable to design, final assessment, designation, marking and documentation for butterfly valves having metallic bodies for use with all type of pipe end connections (e.g. wafer, lug, flange, butt welding, threaded ends) and used for isolating, regulating or controlling applications.
The PN and Class ranges are:
-   PN 2,5; PN 6; PN 10; PN 16; PN 25; PN 40; PN 63; PN 100; PN 160;
-   Class 150; Class 300; Class 600; Class 900.
The size range is:
-   DN 20; DN 25; DN 32; DN 40; DN 50; DN 65; DN 80; DN 100; DN 125; DN 150; DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600; DN 700; DN 750; DN 800; DN 900; DN 1 000; DN 1 050; DN 1 100; DN 1 200; DN 1 400; DN 1 500; DN 1 600; DN 1 800; DN 2 000; DN 2 200; DN 2 400; DN 2 600; DN 2 800; DN 3 000; DN 3 200; DN 3 400; DN 3 600; DN 3 800; DN 4 000.
DN 750 and DN 1 050 apply only for Class 150 and Class 300.
NOTE   Sizes are listed in Table D.1.
For applications in accordance with the European legislation for pressure equipment, EN 16668:2025 applies together with this document.
For chemical applications, EN 12569:2020 applies together with this document.
For gas distribution systems, EN 13774:2013 applies together with this document.
For gas transport systems, EN 1594:2024 applies together with this document.
For water supply application, EN 1074-2:2000 applies together with this document.
For process control application, EN 1349:2009 applies together with this document.
The correspondence between DN and NPS is given for information in Annex D.

This document specifies the design, testing and marking requirements for spring loaded pressure relief valves (PRV), for use in liquefied petroleum gas (LPG) cylinders of water capacity of 0,5 l up to and including 150 l.
These PRVs can be either an integral part of a cylinder valve (see EN ISO 14245 [4] and EN ISO 15995 [5]) or a separate device.

The scope of this part of IEC 62351 is to facilitate role-based access control (RBAC) for power system management. RBAC assigns human users, automated systems, and software applications (collectively called "subjects" in this document) to specified "roles", and restricts their access to only those resources, which the security policies identify as necessary for their roles.
As electric power systems become more automated and cyber security concerns become more prominent, it is becoming increasingly critical to ensure that access to data (read, write, control, etc.) is restricted. As in many aspects of security, RBAC is not just a technology; it is a way of running a business. RBAC is not a new concept; in fact, it is used by many operating systems to control access to system resources. Specifically, RBAC provides an alternative to the all-ornothing super-user model in which all subjects have access to all data, including control commands.
RBAC is a primary method to meet the security principle of least privilege, which states that no subject should be authorized more permissions than necessary for performing that subject’s task. With RBAC, authorization is separated from authentication. RBAC enables an organization to subdivide super-user capabilities and package them into special user accounts' termed roles for assignment to specific individuals according to their associated duties. This subdivision enables security policies to determine who or what systems are permitted access to which data in other systems. RBAC thus provides a means of reallocating system controls as defined by the organization policy. In particular, RBAC can protect sensitive system operations from inadvertent (or deliberate) actions by unauthorized users. Clearly RBAC is not confined to human users though; it applies equally well to automated systems and software applications, i.e., software parts operating independent of user interactions.
The following interactions are in scope:
– local (direct wired) access to the object by a human user, a local and automated computer agent, or a built-in human machine interface (HMI) or panel;
– remote (via dial-up or wireless media) access to the object by a human user;
– remote (via dial-up or wireless media) access to the object by a remote automated computer agent, e.g., another object at another substation, a distributed energy resource at an enduser’s facility, or a control centre application.
While this document defines a set of mandatory roles to be supported, the exchange format for defined specific or custom roles is also in scope of this document. This is achieved by defining two different encoding approaches to handle the definition of custom roles, either based on specific permissions or based on constraints to existing permissions. The definition on handling custom based roles was started in IEC 62351-90-1 and taken over into the IEC 62351-8:2020. Moreover, additionally to the definition of custom roles based on associated permissions, this document also includes options how to assign permissions to objects in a general way. Referencing documents will provide a mapping to a concrete data model to ensure an interoperability for standard roles used in different data models as well as for custom defined roles. Referencing documents might be standards such as IEC PAS 61850-90-19 or IEC 60870-5-7:2025 or also definitions by an operator.
Out of scope for this document are all topics which are not directly related to the definition of roles and access tokens for local and remote access, especially administrative or organizational tasks, such as:
– definition of usernames and password definitions/policies;
– management of keys and/or key exchange;
– engineering process of roles;
– assignment of roles;
– selection of trusted certification authorities issuing credentials (access tokens);
– defining the tasks of a security officer;
– integrating local policies in RBAC.
NOTE Specifically, the manage

This document is applicable to electrical insulating matting made of flexible insulating material for use as a covering of the surface on which the worker is positioned and for worker´s electrical protection on electrical installations up to 36 000 V AC for AC use or 36 000 V AC and 54 000 V DC for AC/DC use.
NOTE 1 The electric potential of the surface on which the worker is positioned is usually that of earth.
NOTE 2 See 4.2 for maximum use voltage.
NOTE 3 DC only rated matting is not specified in this document.
NOTE 4 This document does not cover the use of insulating blankets (see IEC 61112)

This part of IEC 61000 defines test methods for immunity to voltage dips, short interruptions and voltage variations at the DC input power port of electrical or electronic equipment.
This document is applicable to equipment and systems whose DC input power ports are intended to be connected to low voltage DC networks external to the equipment and systems.
The object of this document is to establish a common and reproducible basis for testing electrical and electronic equipment when subjected to voltage dips, short interruptions or
voltage variations on DC input power ports.
This document defines:
– the range of test levels;
– the test generator;
– the test set-up;
– the test procedure.
The test described hereinafter applies to electrical and electronic equipment and systems. It also applies to modules or subsystems whenever the equipment under test’s (EUT) rated power is greater than the test generator capacity specified in Clause 6.
The ripple at the DC input power port is not included in the scope of this document. It is covered by IEC 61000-4-17.
This document does not specify the tests to be applied to particular apparatus or systems. Its main aim is to give a general basic reference to IEC product committees. These product committees (or users and manufacturers of equipment) remain responsible for the appropriate choice of the tests and the severity level to be applied to their equipment.

This document a) addresses the support of safety extra low voltage (SELV) and limited power source (LPS) applications that provide remote power over: - 4-pair balanced cabling in accordance with the reference implementations of EN 50173 series using currents per conductor of up to 500 mA; - 1-pair balanced cabling using currents per conductor of up to 2 000 mA; and targets the support of applications that provide remote power over balanced cabling to terminal equipment,  b) covers the transmission and electrical parameters needed to support remote power over balanced cabling, c) covers various installation scenarios and how these may impact the capability of balanced cabling to support remote powering, d) specifies design and configuration of cabling as specified in EN 50173-1. NOTE SELV requirements specify a maximum voltage of 60 V DC and LPS is understood in the applications referenced to be up to 100 W supplied within cabling. This document includes a mathematical model to predict the behaviour of different bundle sizes, various cabling constructions, and installation conditions for different current capacities.

This document specifies calculation methods for determining the required mass flow to be relieved for each specified conditions described in Table 1.
Recommendations for pressure relief devices for cryostats are given in Annex A.

This part of IEC 61851 applies to the EV supply equipment to provide energy transfer between the supply network and electric vehicles (EVs), with a rated maximum voltage at side A (supply network side) up to 1 000 V AC or up to 1 500 V DC and a rated maximum voltage at side B (EV side) up to 1 250 V DC.
NOTE A rated maximum voltage of the EV supply equipment at side B of up to 1 500 V DC is under consideration.
This document specifies the EV supply equipment of megawatt charging system (MCS) equipped with a coupler according to IEC TS 63379. Systems different to MCS using a coupler specified in IEC TS 63379 are under consideration.
The requirements for bidirectional power flow systems are under consideration.
This document does not cover all safety aspects related to maintenance.
This document specifies systems with protective separation between side A and side B.
The requirements for digital communication between the EV supply equipment and the EV for control of energy transfer are defined in ISO 15118-10 and ISO 15118-20.
EV supply equipment in compliance with this document is not intended to provide energy transfer to a single EV using
– multiple vehicle connectors of the same EV supply equipment, or
– multiple EV supply equipment.
The requirements for such use cases are not specified in this document but are under consideration.
The requirements for EVs mated to EV supply equipment according to this document are specified in ISO 5474-3:2024, Annex B.

This document specifies the fundamental aspects of semantic interoperability for the S2 interface and the related data exchange between a CEM and the resource managers within the premises. It provides a technology independent set of data models and interaction patterns in order to enable applications for energy management within the premises. This document does not include:
– mappings to concrete data representations (XML, JSON and similar);
– mappings to application protocols for the message passing;
– security related aspects.
This group EE publication is primarily intended to be used as an EE standard for the products mentioned in the scope, but is also intended to be used by TCs in the preparation of publications for products which are included in the boundary mentioned in the scope of this document.

This document specifies a method to determine the moisture content of aluminium ores. It applies to the samples taken from bulk aluminium ores, e.g. shipments and stockpiles.

This document specifies procedures for static and cyclic strength tests on lower-limb prostheses (see NOTE 2) which typically produce compound loadings by the application of a single test force. The compound loads in the test sample relate to the peak values of the components of loading which normally occur at different instants during the stance phase of walking. This document specifies Test Ranges (R) by specifying locomotion profiles for the cyclic test in relation to the intended use. According to the concept of the tests of this document, each sample of lower limb prosthetic device or structure submitted for test is, nevertheless, free to develop its individual performance under load. The tests described in this document comprise: principal static and cyclic tests for all components; a separate static test in torsion for all components; separate static and cyclic tests on ankle-foot devices and foot units for all ankle-foot devices as single components including ankle units or ankle attachments and all foot units as single components; a separate static ultimate strength test in maximum knee flexion on knee joints and associated parts for all knee units or knee-shin-assemblies and adjacent components that normally provide the flexion stop on a complete prosthesis; optional separate tests on knee locks for all mechanisms which lock the knee joint in the extended position of the knee unit or knee-shin-assembly. The tests described in this document apply to specific types of ankle-disarticulation prostheses (see NOTE 2), to transtibial (below-knee), knee-disarticulation and transfemoral (above-knee) prostheses and to the distal (lower) part of hip-disarticulation and hemi-pelvectomy prostheses (see NOTE 3). The test geometry described in this standard is only intended to be used up to a level of 150 mm above the knee-joint centre. This document is suitable for the assessment of the conformity of lower limb prosthetic devices or structures with the strength requirements specified in ISO 22523:2006, 4.4 (see NOTE 1). Lower limb prosthetic devices or structures on the market, which have demonstrated their compliance with the strength requirements specified in ISO 22523:2006, 4.4 through submission to the relevant tests of ISO 22523:2006, need not be retested to this document. NOTE 1 The tests can be performed on complete structures, on part structures or on individual components. NOTE 2 The tests only apply to ankle-disarticulation prostheses which include (foot) components of prosthetic ankle-foot devices taken from the normal production line. NOTE 3 The distal part comprises the knee unit, the ankle-foot device and all parts between. Tests on hip units are described in ISO 15032.

This document gives guidance on the sample preparation of milk and milk products for physical and chemical analysis, including analysis by applying instrumental methods. This document specifies the (sub)sampling and sample preparation steps carried out after sampling in accordance with ISO 707 | IDF 50 [1] and prior to method-specific sample preparations (e.g. as with analytical methods). NOTE Analysis on volatile substances, minor components or allergens can require additional precautionary measures in sample preparation in order to avoid loss of or contamination with one or more target analytes.

This document specifies the acceptable quantitative and qualitative microbiological limits in finished cosmetic products. It is applicable to all cosmetics, and assists interested parties in the assessment of the microbiological quality of cosmetic products.

This document provides considerations on the planning and execution of verification and validation (V&V) of the cybersecurity of items and components of road vehicles, in the context of ISO/SAE 21434.

This document specifies additional competence requirements for personnel involved in the audit and certification process for innovation management systems (IMS) and complements the existing requirements of ISO/IEC 17021-1. NOTE This document is applicable to auditing and certification of an IMS based on ISO 56001.

This document defines terms used in the specification, design, manufacture, construction, installation, commissioning, maintenance and decommissioning of refrigerating systems with regard to safety and environmental requirements. The term "refrigerating systems" includes heat pumps and air conditioners.