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EN 1991-4:2026/prA1 Public enquiry
Comment end date 2026-09-24
Eurocode 1 - Actions on structures - Part 4: Silos and tanks

1.1 Scope of EN 1991-4 (1) This document provides rules for calculating actions for the structural design of silos and tanks. NOTE 1 Silos are used for the storage of particulate solids. Tanks are used for the storage of liquids. NOTE 2 For limitations on rules for silos given in this document, see 1.3. NOTE 3 For limitations on rules for tanks given in this document, see 1.4. (2) This document includes some provisions for actions on silo and tank structures that are not only associated with the stored particulate solids or liquids (e.g. the effects of thermal differentials) but substantially affected by them. NOTE Liquid loads on tanks are very precisely defined. Many loads on silos are not known with great precision. This document provides guidance for many practical situations for which very limited certain knowledge is available, and the information is derived from the limited experimental and analytical information available, coupled with conclusions drawn from failure investigations. The information is not based on a sound statistical treatment of experimental data. (3) This document is intended for use with concrete, steel, aluminium, timber and FRP storage structures. NOTE FRP is the standard acronym for fibre reinforced polymer materials. (4) This document is also applicable for the structural assessment of existing silos and tanks, unless otherwise specified by the relevant authority or, if not specified, agreed between the relevant parties for the specific project. NOTE 1 Changes in filling or discharge arrangements, changes in the wall friction of inner surfaces, or in the use of the silo, including storage of different particulate solids, can be reasons for assessing existing silos. NOTE 2 Differentiation of the liquid stored can be a reason for assessing existing tanks. 1.2 Assumptions (1) The assumptions of EN 1990-1 apply. (2) This document is intended to be used in conjunction with EN 1990 1, with the other parts of EN 1991, EN 1992, EN 1993, EN 1995, EN 1997, EN 1998 and EN 1999 where relevant to the design of silos and tanks. 1.3 Limitations on silos 1.3.1 Geometrical limitations (1) The following geometrical limitations apply to the design rules for silos and silo batteries (see 3.2.59 and 3.2.60) covered by this document: - the silo planform cross-section shapes are limited to those shown in Figure 1.1c. NOTE 1 Further information concerning planform cross-section geometries is given in Clause 7. NOTE 2 For the determination of the effective diameter dc of the silo see Figure 1.1c; - the following dimensional limitations on the aspect ratio for free-standing single cell silos hc/dc, the overall height hb and the effective diameter dc apply (see Figure 1.1): hc/dc < 10 (1.1) hb < 100 m (1.2) dc < 60 m (1.3) NOTE 3 See Figure 1.1 for hc, dc and hb. - the structural transition lies in a single horizontal plane (see Figure 1.1a). [Figure 1.1 - Silo forms showing dimensions and pressure notation] (2) Only hoppers that are conical (i.e. axisymmetric), rectangular pyramidal with a/b ≤ 1,5, wedge-shaped (i.e. with two vertical end walls on opposite sides) or oblique are covered by this document. Other hopper shapes and hoppers with internal structures require special considerations. (3) Silos with an oblique conical hopper used to achieve an eccentric outlet are covered by this document. (4) Silos with an oblique hopper are covered, but generally silos with a systematically non-symmetric geometry are not specifically covered by this document. These situations include a chisel hopper (i.e. a wedge hopper beneath a circular cylinder) and hoppers with an elongated outlet other than wedge shaped. 1.3.2 Limitations on the stored particulate solids (1) The following limitations on the stored particulate solids apply to the design rules for silos contained in this document: ...

prEN IEC 61076-3:2026 Public enquiry
Comment end date 2026-08-12
Connectors for electrical and electronic equipment - Product requirements - Part 3: Rectangular connectors - Sectional specification
EN 12841:2024/prA1 New
Comment end date 2026-08-06
Personal fall protection equipment - Rope access systems - Rope adjustment devices

This European Standard applies to rope adjustment devices intended for use in rope access systems. It specifies the requirements, test methods, marking and manufacturer’s instructions and information.

prEN IEC 61000-4-4:2026 Public enquiry
Comment end date 2026-09-02
Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement techniques - Electrical fast transient/burst immunity test
prEN IEC 60704-2-6:2026 Public enquiry
Comment end date 2026-09-04
Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-6: Particular requirements for tumble dryers
prEN IEC 80601-2-86:2026 Public enquiry
Comment end date 2026-09-16
Medical electrical equipment - Part 2-86: Particular requirements for the basic safety and essential performance of electrocardiographs, including diagnostic equipment, monitoring equipment, ambulatory equipment, electrodes, cables and leadwires
prEN 3614 Public enquiry
Comment end date 2026-10-02
Aerospace series - Bolt, normal hexagonal head, relieved shank, long thread, in heat resisting steel FE-PA2601 (A286), silver plated - Classification: 900 MPa / 650 °C

This document specifies the characteristics of silver plated bolts, normal hexagonal head with relieved shank and long thread in heat resisting steel FE-PA2601 (A286), for aerospace applications. Classification: 900 MPa /650 °C

prEN ISO 12100 Public enquiry
Comment end date 2026-08-26
Safety of machinery - General principles for design - Risk assessment and risk reduction (ISO/DIS 12100:2026)

ISO 12100:2010 specifies basic terminology, principles and a methodology for achieving safety in the design of machinery. It specifies principles of risk assessment and risk reduction to help designers in achieving this objective. These principles are based on knowledge and experience of the design, use, incidents, accidents and risks associated with machinery. Procedures are described for identifying hazards and estimating and evaluating risks during relevant phases of the machine life cycle, and for the elimination of hazards or sufficient risk reduction. Guidance is given on the documentation and verification of the risk assessment and risk reduction process. ISO 12100:2010 is also intended to be used as a basis for the preparation of type-B or type-C safety standards. It does not deal with risk and/or damage to domestic animals, property or the environment.

prEN IEC 62053-21:2026 Public enquiry
Comment end date 2026-08-12
Electricity metering equipment - Particular requirements - Part 21: Static meters for AC active energy (classes 0,5, 1 and 2)
prEN IEC 55014-1 [fra4]:2026 Public enquiry
Comment end date 2026-09-02
Electromagnetic compatibility - Requirements for household appliances, electric tools and similar apparatus - Part 1: Emission
prEN 12259-16 Public enquiry
Comment end date 2026-09-08
Fixed firefighting systems - Components for sprinkler and water spray systems - Part 16: Polymer coated pipe systems

This document specifies requirements, test methods and performance criteria for factory-applied polymer coatings applied to the internal and external surfaces of steel pipes intended for use in fixed water-based fire-fighting systems designed in accordance with the EN 12845 series of standards. This document specifies requirements for the polymer coating when used as a corrosion-protection system. The mechanical and functional characteristics of the steel pipes and pipe systems are outside the scope of this document and are as specified in the EN 12845 series. NOTE Throughout this document, the term "coating" refers exclusively to factory-applied polymer coatings unless otherwise specified.

prEN ISO/IEEE 11073-10406 Public enquiry
Comment end date 2026-09-21
Health Informatics - Device Interoperability - Part 10406: Personal health device communication, device specialization, basic electrocardiograph (ECG) (1- to 3-lead ECG) (ISO/IEEE FDIS 11073-10406:2026)

Within the context of the ISO/IEEE 11073 family of standards for device communication, a normative definition of the communication between personal basic electrocardiograph (ECG) devices and managers (e.g. cell phones, personal computers, personal health appliances, and set top boxes) in a manner that enables plug-and-play interoperability is established in ISO/IEEE11073-10406:2012. Appropriate portions of existing standards including ISO/IEEE 11073 terminology and IEEE 11073-20601 information models are leveraged. The use of specific term codes, formats and behaviours in telehealth environments restricting optionality in base frameworks in favour of interoperability is specified. A common core of communication functionality for personal telehealth basic ECG (1- to 3-lead ECG) devices is defined. Monitoring ECG devices are distinguished from diagnostic ECG equipment with respect to support for wearable ECG devices, limiting the number of leads supported by the equipment to three, and not requiring the capability of annotating or analysing the detected electrical activity to determine known cardiac phenomena. ISO/IEEE 11073-10406:2012 is consistent with the base framework and allows multifunction implementations by following multiple device specializations (e.g. ECG and respiration rate).

prEN IEC 60216-4:2026 Public enquiry
Comment end date 2026-10-02
Electrical insulating materials - Thermal endurance properties - Part 4: Ageing ovens
EN IEC 61280-4-2:2024/prA1:2026 Public enquiry
Comment end date 2026-09-09
Amendment 1 - Fibre-optic communication subsystem test procedures - Part 4-2: Installed cabling plant - Single-mode attenuation and optical return loss measurements
prEN ISO 19085-17 New
Comment end date 2026-08-06
Woodworking machines - Safety - Part 17: Edge banding machines fed by chains (ISO/DIS 19085-17:2026)

This document gives the safety requirements and measures for edge banding machines fed by chains or belts, with manual loading and unloading and maximum workpiece height capacity of 100 mm, capable of continuous production use, hereinafter referred as “machines”. It deals with all significant hazards, hazardous situations and events, listed in Annex A, relevant to the machines, when operated, adjusted and maintained as intended and under the conditions foreseen by the manufacturer; reasonably foreseeable misuse has been considered too. Also, transport, assembly, dismantling, disabling and scrapping phases are taken into account. The machines are designed to process in one pass one end (single-end machine) or both ends (double-end machine) of panels of: —    materials with similar physical characteristics to wood (see ISO 19085-1:2021, 3.2), even with a core sheet of aluminium light alloy; —    gypsum plaster boards. Edges to be applied by the machine can be made of: —    paper; —    melamine; —    plastic; —    composite materials; —    aluminium; —    light alloy; —    veneer; —    solid wood. It is also applicable to machines fitted with one or more of the following devices/working units, whose hazards have been dealt with: —    hot air banding unit; —    laser banding unit; —    infrared banding unit; —    dynamic processing units; —    sanding belt units; —    milling unit installed out of the integral enclosure at the panel side on single-end machines; —    milling unit installed out of the integral enclosure between machines halves of double-end machines; —    additional fixed or movable workpiece support along the feed; —    additional infeed workpiece support; —    additional outfeed workpiece support; —    in-feed device for transversal loading of panels in single-end machines; —    intermediate workpiece support in double-end machines; —    automatic panel returner in single-end machines; —    automatic tool changing; —    quick tool changing system; —    automatic multiple edges infeed device; —    workpiece heaters. This document does not deal with any hazards relating to: a)   systems for loading and unloading of the workpiece to a single machine other than automatic panel returner and infeed and outfeed workpiece supports (e.g. robots); b)   the combination of a single machine being used with other machines (as part of a line); c)   workpiece dividing unit installed out of the integral enclosure and/or whose tools protrude out of the integral enclosure; d)   plasma banding unit. It is not applicable to machines intended for use in potentially explosive atmosphere nor manufactured before the date of its publication.

prEN IEC 60335-2-48:2026/prAA:2026 Public enquiry
Comment end date 2026-09-02
Household and similar electrical appliances - Safety - Part 2-48: Particular requirements for commercial electric grillers and toasters

This European Standard deals with the safety of electrically operated commercial grillers and toasters not intended for household use. The rated voltage being not more than 250 V for single-phase appliances connected between one phase and neutral, and 480 V for other appliances. Rotary or continuous grillers and toasters and similar appliances intended for grilling by radiant heat such as rotisseries, salamanders, etc. are within the scope of this standard. Appliances within the scope of this standard are typically used in restaurants, canteens, hospitals and commercial enterprises such as bakeries, butcheries, etc.

prEN 3155-066 Public enquiry
Comment end date 2026-09-08
Aerospace series - Electrical contacts used in elements of connection - Part 066: Contacts, electrical, female, type A, crimp, class S, size 8 - Product standard

This document specifies the required characteristics, tests and tooling applicable to female electrical contacts, type A, crimp, class S, size 8, used in elements of connection in accordance with EN 3155-002. It can be used together with EN 3155-001. The associated male contacts are specified in EN 3155-065.

prEN IEC 63470:2026 Public enquiry
Comment end date 2026-09-20
Guideline for gate oxide reliability and robustness evaluation procedures for silicon carbide power mosfets (Fast Track)
EN ISO 12855:2025/prA1 Public enquiry
Comment end date 2026-10-03
Electronic fee collection - Information exchange between service provision and toll charging - Amendment 1 (ISO 12855:2025/DAM 1:2026)
ISO/DIS 25459 Public enquiry
Comment end date 2026-08-09
In vitro diagnostic medical devices — Requirements for determining commutability of certified reference materials used as secondary calibrators or trueness controls
EN IEC 62271-202:2022/prA1:2026 Public enquiry
Comment end date 2026-08-26
Amendment 1 - High-voltage switchgear and controlgear - Part 202: AC prefabricated substations for rated voltages above 1 kV and up to and including 52 kV
prEN IEC 61788-29:2026 Public enquiry
Comment end date 2026-09-16
Electromechanical properties measurement - Electromechanical test of practical rebco and bscco composite superconductors at liquid nitrogen temperature
prEN IEC 60601-2-36:2026 Public enquiry
Comment end date 2026-09-16
Medical electrical equipment - Part 2-36: Particular requirements for the basic safety and essential performance of equipment for extracorporeally induced lithotripsy
prEN ISO 1628-3 Public enquiry
Comment end date 2026-08-25
Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 3: Polyethylenes and polypropylenes (ISO/DIS 1628-3:2026)

This part of ISO 1628 defines particular conditions for determining the reduced viscosity (also known as viscosity number) and intrinsic viscosity of polyethylenes and polypropylenes at elevated temperatures (135 °C – 160 °C) in dilute solution. The viscosity of polymer solutions can be affected by fillers or additives present in the sample. The value of a reduced viscosity determined by this method can therefore be unreliable if the sample contains fillers or other additives. NOTE Reduced viscosity is also known as the Staudinger function ( Jv) and intrinsic viscosity as the Staudinger index ( Jg).

prEN 304 623 V0.1.3 (2026-06) Public enquiry
Comment end date 2026-08-31
Cyber Security (CYBER); CRA; Cybersecurity requirements for boot managers
Total records found: 272
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