Standartų projektų sąrašas

prEN ISO 14713-2 Viešoji apklausa

Komentavimo iki data 2026-07-21

Cinko dangos. Konstrukcijose esančios geležies ir plieno apsaugos nuo korozijos gairės ir rekomendacijos. 2 dalis. Reikalavimai ir rekomendacijos, skirti karštai cinkuojamiems gaminiams (ISO/DIS 14713-2:2026)

This document gives guidelines and recommendations for the general principles of design appropriate to articles to be hot dip galvanized after fabrication (e.g. in accordance with ISO 1461) for the corrosion protection of, for example, articles that have been manufactured in accordance with EN 1090-2. This document does not apply to hot dip galvanized coatings applied to continuous wire or sheet (e.g. to EN 10346).

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prEN ISO 19085-4 Viešoji apklausa

Komentavimo iki data 2026-08-06

Medienos apdirbimo mašinos. Sauga. 4 dalis. Diskinės vertikaliai įtvirtinto tašo pjaustymo staklės (ISO/DIS 19085-4:2026)

This document specifies the safety requirements and measures for manually loaded and unloaded vertical panel circular sawing machines (defined in 3.1) capable of continuous production use, with hand feed or integrated feed, hereinafter referred to also as “machines”. This document deals with all significant hazards, hazardous situations and events, as listed in Annex A, relevant to the machines, when operated, adjusted and maintained as intended and under the conditions foreseen by the manufacturer, including reasonably foreseeable misuse. Transport, assembly, dismantling, disabling and scrapping phases are also taken into account. This document is also applicable to machines fitted with one or more of the following devices/additional working units, whose hazards have been dealt with: — an integrated feed device; — a device for scoring; — an angle cutting device; — a middle support device; — programmable end stops for parallel vertical cuts; — a device for grooving with a milling tool with a cutting width not exceeding 27 mm; — a panel pusher; — a panel lowering device; — stop devices for workpiece during horizontal cuts. The machines are designed for cutting panels consisting of: a) solid wood; b) material with similar physical characteristics to wood (see ISO 19085-1:2021, 3.2); c) composite materials with core consisting, for example, of polyurethane or mineral material laminated with light alloy; d) polymer-matrix composite materials and reinforced thermoplastic/thermoset/elastomeric materials; e) gypsum boards, gypsum bounded fibreboards; f) honeycomb aluminium boards; g) matrix engineered mineral boards, silicate boards; h) aluminium light alloy plates; i) composite boards made from the materials listed above. This document does not apply to machines — with pressure beam and saw unit mounted behind the workpiece support, — where the guide rails on which the saw unit moves vertically are fixed on the machine frame and the horizontal cut can only be made by manually feeding the panel, — designed to cut in vertical direction only, — automatically performing two or more cutting cycles in sequence, — intended for use in potentially explosive atmosphere, and — manufactured prior to the publication of this document.

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prEN 50416:2026 Viešoji apklausa

Komentavimo iki data 2026-06-24

Buitiniai ir panašios paskirties elektriniai prietaisai. Sauga. Ypatingieji reikalavimai, keliami komercinėms elektrinėms konvejerinėms indaplovėms

This clause of Part 1 is replaced with the following. This document deals with the safety of electrically operated commercial conveyor dishwashing machines for washing dishes, glassware, cutlery and similar reusable articles, with or without means for water heating or drying, not intended for household and similar purposes, their rated voltage being not more than 250 V for single-phase appliances connected between one phase and neutral and 480 V for other appliances. These conveyor dishwashing machines are designed to be connected to hot and/or cold water supply. Dishwashing machines making use of steam or hot water for heating purposes are also within the scope of this document. These appliances are used by experts or instructed persons for commercial dishwashing in areas not open to the public, for example in kitchens of restaurants, canteens, hospitals, and in commercial enterprises such as bakeries and butcheries. NOTE 101 Examples of such appliances are: — flight conveyor dishwashing machine; — rack conveyor dishwashing machine. Requirements to avoid backsiphonage of non-potable water into the water mains are specified in Annex BB. This document deals with specific requirements on noise emitted from these appliances because the generated noise can be LpA > 70 dB(A) and is considered to be a relevant hazard. See Clause 7.12.104, 22.115 and Annex CC. The electrical part of appliances making use of other forms of energy is also within the scope of this document. This document deals with the reasonably foreseeable hazards presented by appliances that are encountered by all persons in and around the installation place or workplace. NOTE 102 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 by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities; — in many countries, additional requirements are specified for appliances incorporating pressurized parts; — for scrapping of appliances, additional requirements can be necessary. This document does not apply to: — commercial electric dishwashing machines under EN IEC 60335 2 58; — appliances designed exclusively for industrial purposes, for example machines used in the food industry for cleaning receptacles that serve as packaging for final products (e.g. bottle-cleaning machines) and machines used in manufacturing processes; — gas heated appliances which are part of the conveyor dishwashing machines; — movable appliances; — dishwashing machines that do not form one functional unit, for example where a transportation device transfers the load from one separate unit to another; — separately driven transport devices not confined in the appliance; — 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); — sterilizers and washer-disinfectors used to treat medical materials (EN IEC 61010 2 040). With this European revision 2.0 of the document, the EN 50416:2005 is superseded. This European revision 2.0 of the document, supplements or modifies the corresponding clauses of the standards below: — EN IEC 60335 1:2023+A11:2023+prA12:2026. Secretary’s note: The above addition has been moved from the Introduction (informative text) to the Scope (normative text) of the standard following discussions with the HAS consultants. According to an EC decision (document GROW.H.3/SM/MH/DT 12/1/2024), Part 1 must be referenced by date in Part 2. Consequently, the standard has been included in Clause 2, “Normative references”. (...)

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prEN 300 338-4 V1.3.0 (2026-04) Viešoji apklausa

Komentavimo iki data 2026-06-29

Technical characteristics and methods of measurement for equipment for generation, transmission and reception of Digital Selective Calling (DSC) in the maritime MF, MF/HF and/or VHF mobile service; Part 4: Class E DSC

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prEN 18282 Viešoji apklausa

Komentavimo iki data 2026-07-14

Dirbtinis intelektas. DI sistemų kibernetinio saugumo specifikacija

This document addresses organizational and technical solutions aimed at ensuring the cybersecurity of high-risk AI systems over the life cycle, appropriate to the relevant circumstances and the risks. The technical solutions to address AI-specific vulnerabilities include, where appropriate, measures to prevent, detect, respond to, resolve and control for attacks trying to manipulate the training dataset (data poisoning), or pre-trained components used in training (model poisoning), inputs designed to cause the model to make a mistake (adversarial examples or model evasion), confidentiality attacks or model flaws. This document provides objective criteria to enable decisions on whether a given technical or organizational solution adequately achieves a given vulnerability-related goal.

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prEN 18348 Viešoji apklausa

Komentavimo iki data 2026-07-21

Plastikai. Būdingasis biologinis skaidumas. Kriterijai ir tyrimo metodai

This document defines test methods and criteria for distinguishing intrinsically biodegradable plastic materials from those that are persistent. Biodegradability is inferred from biodegradation tests conducted under aerobic conditions, i.e. under the conditions typically found in most natural habitats. Plastics that undergo ultimate biodegradation under aerobic conditions in a manner similar to natural polymer materials are defined as biodegradable plastics. This document describes a method for distinguishing between non-biodegradable plastics, which do not biodegrade even when environmental conditions are favourable for biodegradation (including aerobic conditions), and biodegradable plastics, i.e. those that biodegrade upon contact with active microorganisms when environmental conditions are favourable for biodegradation. The aim is to demonstrate ultimate aerobic biodegradability of plastic materials, i.e. the intrinsic potential for conversion to carbon dioxide, water and biomass by aerobic microorganisms in an oxygen-rich environment, which is representative of most natural environments. The potential for biodegradation should be verified using alternative tests and criteria, if a deposition in a permanent anaerobic environment (e.g. deep subsurface environments, wetlands and swamps, anoxic zones in oceans and lakes) is expected. NOTE Currently, there are no methodologies or criteria available to verify accumulation due to the lack of biodegradation of plastics in such anaerobic habitats. The plastic materials identified as intrinsically biodegradable following this document can be used in the design of products with a high risk of dispersion whenever the use of biodegradable components is searched by the designer. Intrinsically non-biodegradable components are not susceptible to biodegradation and therefore cannot be removed from the environment by the action of micro-organisms. This factor tends to increase the residence time of products in the environment. In addition, their eventual degradation, mainly due to abiotic factors, results in persistent fragments (microplastics). The test scheme described in this document is not specific to any particular application. Rather, it is a framework methodology that can be used in different industries to identify biodegradable plastics that can be used to make different types of products and for different applications. For the characterisation and environmental assessment of products placed on the market containing plastics identified as biodegradable according to this document, reference is made to the specific product standards, where available. This document only deals with the definition of intrinsic biodegradability of plastic materials, without defining the hazard of the products, which requires a specific assessment that is beyond the scope of this document. The rate of biodegradation of a plastic object as a function of environmental conditions cannot be determined from this document. Therefore, this document is not sufficient to carry out an analysis of the ecological risk associated with the dispersal of products, as this requires an assessment of the intrinsic hazard, of the environmental fate, in addition to the assessment of biodegradability. The methodology described in this document does not apply to applications covered by mandatory regulations.

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IEC/IEEE 62704-4 ED2 Viešoji apklausa

Komentavimo iki data 2026-08-05

Savitosios sugerties spartos (SAR), tenkančios žmogaus kūnui iš belaidžio ryšio įtaisų, veikiančių nuo 100 kHz iki 10 GHz dažnių diapazone, pikinio erdvinio vidurkio nustatymas. 4 dalis. Baigtinių elementų metodo, taikomo SAR skaičiuoti, naudojimo bendrieji reikalavimai

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prEN IEC 60335-2-24:2026/prAA:2026 Viešoji apklausa

Komentavimo iki data 2026-06-24

Buitiniai ir panašios paskirties elektriniai prietaisai. Sauga. 2-24 dalis. Ypatingieji reikalavimai, keliami šaldymo ir valgomųjų ledų aparatams bei ledo generatoriams

This standard deals with the safety of the following appliances, their rated voltage being not more than 250 V for single-phase appliances, 480 V for other appliances and 24 V DC for appliances when battery-operated: – refrigerating appliances for household and similar use; – ice-makers incorporating a motor-compressor and ice-makers intended to be incorporated in frozen food storage compartments intended for household use; – refrigerating appliances and ice-makers for applications similar to household use such as for camping, in leisure accommodation vehicles, on boats for leisure purposes and on board ships; – mobile refrigerating appliances. These appliances can be operated from the mains, from a separable battery or operated either from the mains or from a separable battery or from other sources of energy (gas, liquid and solid fuel). This standard deals also with refrigerating appliances intended for the use on boats for leisure purposes and on board ships, for which the normative Annex FF is applicable. This standard also deals with the safety of ice-cream appliances intended for household use, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances. It also deals with compression-type appliances for household and similar use, which use flammable refrigerants. This standard does not cover features of the construction and operation of those refrigerating appliances which are dealt with in other IEC standards.

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prEN 3723 Viešoji apklausa

Komentavimo iki data 2026-06-25

Orlaiviai ir erdvėlaiviai. Karščiui atsparaus plieno FE-PA92HT (A286), šešiabriaunės, savaiminio fiksavimo veržlės, padengtos MoS2. Klasifikacija. 1 100 MPa (esant aplinkos temperatūrai) ir 425 °C

This document specifies the characteristics of self-locking hexagonal nuts in FE-PA92HT, MoS2 coated, for aerospace applications. Classification: 1 100 MPa1/425 °C2.

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prEN ISO 11268-1 Viešoji apklausa

Komentavimo iki data 2026-07-14

Dirvožemio kokybė. Teršalų poveikis sliekams. 1 dalis. Ūmaus toksinio poveikio Eisenia fetida, Eisenia andrei ir kitoms sliekų rūšims nustatymas (ISO/DIS 11268‑1:2026)

1 Scope This part of ISO 11268 specifies one of the methods for evaluating the habitat function of soils and determining the acute toxicity of soil contaminants and chemicals to Eisenia fetida/Eisenia andrei by dermal and alimentary uptake. It is applicable to soils and soil materials of unknown quality, e.g. from contaminated sites, amended soils, soils after remediation, agricultural or other sites concerned, and waste materials. Effects of substances are assessed using a standard soil, preferably a defined artificial soil substrate. For contaminated soils, the effects on survival are determined in the test soil and in a control soil. According to the objective of the study, the control and dilution substrate (dilution series of contaminated soil) should be either an uncontaminated soil comparable to the soil sample to be tested (reference soil) or a standard soil (e.g. artificial soil). Information is provided on how to use this method for testing chemicals under temperate as well as under tropical conditions. The method is not applicable to volatile substances, i.e. substances for which H (Henry's constant) or the air/water partition coefficient is greater than 1, or for which the vapour pressure exceeds 0,013 3 Pa at 25 °C. This method does not take into account the possible degradation of the substances or contaminants during the test.

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prEN ISO/IEC 24760-1 Viešoji apklausa

Komentavimo iki data 2026-07-21

Informacijos saugumas, kibernetinis saugumas ir privatumo apsauga. Tapatybės duomenų tvarkymo sistema. 1 dalis. Pagrindinės sąvokos ir terminija (ISO/IEC 24760-1:2025)

This document: - defines terms for identity management and specifies core concepts of identity and identity management, and their relationships; - is applicable to any information system where information relating to identity is processed or stored; - is considered to be a horizontal document for the following reasons: - it applies concepts such as distinguishing the term “identity” from the term “identifier” on the implementation of systems for the management of identity information and on the requirements for the implementation and operation of a framework for identity management, - it provides an important contribution to assess identity management systems with regard to their privacy-friendliness and their ability to assure the relevant attributes of an identity, and consequently it provides a foundation and a common understanding for any other standard addressing identity, identity information, and identity management.

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EN 1991-2:2023/prA1 Viešoji apklausa

Komentavimo iki data 2026-08-06

Eurokodas 1. Poveikiai konstrukcijoms. 2 dalis. Tiltų ir kitų inžinerinių statinių eismo apkrovos

(1) This document defines imposed loads (models and representative values) associated with road traffic, pedestrian actions and rail traffic which include, when relevant, dynamic effects and centrifugal, braking and acceleration actions and actions for accidental design situations. (2) Imposed loads defined in this document are applicable for the design of new bridges, including piers, abutments, upstand walls, wing walls and flank walls, noise barriers, canopies etc., and their foundations. Where appropriate, the loads can also be considered as a basis for assessment or modification of existing structures in combination with complementary conditions if necessary. (3) The load models and values given in this document are also applicable for the design of retaining walls adjacent to roads and railway lines and the design of earthworks subject to road or rail traffic actions. This document also provides applicability conditions for specific load models. (4) This document is intended to be used with prEN 1990, the other parts of the EN 1991 series and the EN 1992 series to EN 1999 series for the design of structures.

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prEN ISO 3377-1 Viešoji apklausa

Komentavimo iki data 2026-06-16

Oda. Fizikiniai ir mechaniniai bandymai. 1 dalis. Vieno krašto plėšiamosios apkrovos nustatymas (ISO/DIS 3377-1:2026)

ISO 3377-1:2011 specifies a method for determining the tear strength of leather using a single-edge tear. The method is sometimes described as a trouser tear. It is applicable to all types of leather.

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prEN 16905-5 Viešoji apklausa

Komentavimo iki data 2026-06-25

Šilumos siurbliai su dujiniu endoterminiu varikliu. 5 dalis. Šildymo ir šaldymo režimų sezoninių eksploatacinių charakteristikų skaičiavimas

This part of EN 16905 specifies the calculation of the seasonal performance factor for gas-fired endothermic engine driven heat pumps for heating and/or cooling mode including the engine heat recovery, to be used outdoors. This document only applies to appliances with a maximum heat input (based on net calorific value) not exceeding 70 kW at standard rating conditions. This document only applies to appliances under categories I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL, I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P and II2Er3P according to EN 437. This document only applies to appliances having: a) gas fired endothermic engines under the control of fully automatic control systems; b) closed system refrigerant circuits in which the refrigerant does not come into direct contact with the fluid to be cooled or heated; c) where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 °C during normal operation; d) where the maximum operating pressure in the: 1) heating water circuit (if installed) does not exceed 6 bar, 2) domestic hot water circuit (if installed) does not exceed 10 bar. This document applies to GEHP appliances only when used for space heating or space cooling or for refrigeration, with or without heat recovery. This document is applicable to GEHP appliances that are intended to be type tested. Requirements for GEHP appliances that are not type tested would need to be subject to further consideration.

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EN 15269-20:2020/prA1 Viešoji apklausa

Komentavimo iki data 2026-07-21

Durų blokų, anginių sąrankų ir atidaromųjų langų blokų, įskaitant jų statybinių apkaustų elementus, atsparumo ugniai ir (arba) apsaugos nuo dūmų bandymų rezultatų išplėstinis taikymas. 20 dalis. Durų, anginių, medžiaginių uždangų ir atidaromųjų langų apsauga nuo dūmų

This document, which is intended to be read in conjunction with EN 15269 1, covers doors, shutters, openable windows and fabric curtains of any material and of the following types: - hinged and pivoted (e.g. metal, timber, framed glazed) doors and openable windows of single or double leaf (Table A.1); - horizontally and vertically moving steel sliding doors of single or double leaf with and without pass doors, including telescopic doorsets (Table A.2); - metal rolling shutters and operable fabric curtains (excluding overlapping systems) (Table A.3). The following construction products are not covered by this standard: - unframed glass doors and openable windows; - sectional doors (including stacking doors); - vertically and horizontally folding doors; - horizontally and vertically moving timber sliding doors; - horizontally and vertically moving framed sliding doors (metal or timber). In this document, whenever doors are mentioned, the whole range of doors, shutters, openable windows and operable fabric curtains is included or otherwise mentioned. This document prescribes the methodology for extending the application of test results obtained from test(s) conducted in accordance with EN 1634 3. Subject to the completion of the appropriate test or tests, the extended application can cover all or some of the following examples: - Ambient Temperature Smoke Control (Sa) and Medium Temperature Smoke Control (S200) classifications; - leaf/leaves; - wall/ceiling fixed elements; - glazed elements, louvres and/or vents; - side, transom or overpanels; - items of building hardware; - decorative finishes; - intumescent, smoke, draught or acoustic seals; - alternative supporting construction(s).

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prEN ISO 14880-1 Viešoji apklausa

Komentavimo iki data 2026-07-23

Optics and photonics - Microlens arrays - Part 1: Vocabulary (ISO/DIS 14880-1:2026)

This document defines terms for microlens arrays. It applies to arrays of very small lenses formed inside or on one or more surfaces of a common substrate. This document also applies to systems of microlens arrays.

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EN 1993-1-10:2025/prA1 Viešoji apklausa

Komentavimo iki data 2026-07-30

Eurokodas 3. Plieninių konstrukcijų projektavimas. 1-10 dalis. Medžiagų tąsumas ir jų savybės išilgai storio

1.1 Scope of EN 1993-1-10 (1) EN 1993-1-10 specifies rules for the selection of steel grades and qualities related to fracture toughness to avoid brittle fracture. NOTE Steel quality is also known as (Charpy) subgrade. (2) EN 1993-1-10 specifies rules to specify through thickness properties for welded elements to reduce the risk of lamellar tearing. (3) EN 1993-1-10 specifies additional toughness requirements for specific cases to ensure upper shelf toughness in relation to design ultimate resistance in tension and seismic design. (4) EN 1993-1-10 specifies rules for structural steels as listed in EN 1993-1-1. This document applies to steel grades S235 to S700. (5) EN 1993-1-10 specifies rules that apply to the selection of parent material only. (6) EN 1993-1-10 specifies rules that apply to steel materials covered by EN 1993-1-1:2022, 5.1(3), provided that each individual piece of steel is tested in accordance with the requirements of EN 1993 1 1:2022, 5.2.1 and EN 1090-2:2018+A1:2024, 5.1. (7) This document does not apply to material salvaged from existing steelwork subjected to fatigue or fire. 1.2 Assumptions (1) Unless specifically stated, EN 1990, EN 1991 (all parts) and the other relevant parts of EN 1993-1 (all parts) apply. (2) The design methods given in EN 1993-1-10 are applicable if: - the execution quality is as specified in EN 1090-2 or EN 1090-4, and - the construction materials and products used are as specified in the relevant parts of EN 1993 (all parts), or in the relevant material and product specifications.

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prEN ISO 20126 Archyvuotas

Komentavimo iki data 2026-06-11

Odontologija. Rankiniai dantų šepetėliai. Bendrieji reikalavimai ir bandymo metodai (ISO/DIS 20126:2026)

This document specifies requirements and test methods for the physical properties of manual toothbrushes in order to promote the safety of these products for their intended use. This document does not specify any requirements and test methods for the physical properties of toothbrushes for which all the cleaning elements in the head are elastomer. This document does not apply to manual single tuft toothbrushes, single use, interdental and powered oral hygiene devices. These types of oral hygiene products are evaluated for their safety in-use by appropriate test methods or clinical trials. In addition, for the filaments end-rounding requirements, this document does not apply to particular filament types which are very thin (less than 0,1 mm outside diameter) or have no sharp edges (e.g. tapered, feathered, with split tips, or spherical cap) or non-synthetic filaments, where applying end-rounding process is inappropriate or impossible. These types of manual toothbrushes are evaluated for their safety in-use by appropriate test methods or clinical trials appropriately.

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EN 1996-3:2023/prA1 Viešoji apklausa

Komentavimo iki data 2026-06-25

Eurokodas 6. Mūrinių konstrukcijų projektavimas. 3 dalis. Supaprastinti nearmuotųjų mūrinių konstrukcijų skaičiavimo metodai

1.1 Scope of EN 1996-3 (1) This document provides simplified calculation methods to facilitate the design of the following unreinforced masonry walls, subject to certain conditions of application: - walls subjected to vertical and wind loading; - walls subjected to concentrated loads; - shear walls; - basement walls subjected to lateral earth pressure and vertical loading; - walls subjected to lateral loading but not subjected to vertical loading. NOTE 1 For those types of masonry structures or parts of structures not covered by (1), the design can be based on EN 1996-1-1. NOTE 2 The rules given in this document are consistent with those given in EN 1996-1-1 but are more conservative in respect of the conditions and limitations of their use. (2) This document applies only to those masonry structures, or parts thereof, that are described in EN 1996-1-1 and EN 1996-2. (3) The simplified calculation methods given in this document do not cover the design of double-leaf walls. (4) The simplified calculation methods given in this document do not cover the design for accidental situations. 1.2 Assumptions (1) The assumptions of EN 1990 apply to this document. (2) This document is intended to be used, for direct application, together with EN 1990, the EN 1991 series, EN 1996 1-1, EN 1996-1-2 and EN 1996-2. (3) The rules given in this document assume that concrete floors are designed according to EN 1992-1-1.

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EN 12209:2024/prA1 Viešoji apklausa

Komentavimo iki data 2026-07-14

Statybiniai apkaustai. Mechaninės spynos ir užraktų plokštelės. Charakteristikos ir bandymo metodai

This document specifies product characteristics and test methods of mechanically operated locks and their locking plates. This document covers mechanically operated locks and their locking plates which are either manufactured and placed on the market in their entirety by one producer or assembled from sub-assemblies produced by more than one producer and designed to be used in combination. This document does not cover assessment of the contribution of the product to the fire resistance of specific fire resistance and/or smoke control door set assemblies. This document is not applicable to mechanically/electromechanically cylinders, handles, locks for windows, padlocks, locks for safes, furniture locks or prison locks. This document does not specify mechanically operated multipoint locks and their locking plates which are specified by EN 15685.

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prEN 843-2 Viešoji apklausa

Komentavimo iki data 2026-07-23

Modernioji techninė keramika. Monolitinės keramikos mechaninės savybės kambario temperatūroje. 2 dalis. Jungo modulio, šlyties modulio ir Puasono koeficiento nustatymas

This part of EN 843 specifies methods for determining the elastic moduli, specifically Young’s modulus, shear modulus and Poisson’s ratio, of advanced monolithic technical ceramics at room temperature. This European Standard prescribes four alternative methods for determining some or all of these three parameters: A The determination of Young’s modulus by static flexure of a thin beam in three- or four-point flexure. B The determination of Young’s modulus by forced longitudinal resonance, or Young’s modulus, shear modulus and Poisson’s ratio by forced flexural and torsional resonance, of a thin beam. C The determination of Young’s modulus, shear modulus and Poisson’s ratio from the time-of-flight of an ultrasonic pulse. D The determination of Young’s modulus from the fundamental natural frequency of a struck bar (impulse excitation method). All the test methods assume the use of homogeneous test pieces of linear elastic materials. NOTE 1 Not all ceramic materials are equally and linearly elastic in tension and compression, such as some porous materials and some piezoelectric materials. With the exception of Method C, the test assumes that the test piece has isotropic elastic properties. Method C may be used to determine the degree of anisotropy by testing in different orientations. NOTE 2 An ultrasonic method for dealing with anisotropic materials (ceramic matrix composites) can be found in ENV 14186 (see Bibliography). An alternative to Method D for isotropic materials using disc test pieces is given in Annex A. NOTE 3 At high porosity levels all of the methods except Method C can become inappropriate. The methods are only suitable for a maximum grain size (see EN 623-3), excluding deliberately added whiskers, of less than 10 % of the minimum dimension of the test piece. NOTE 4 The different methods given in this European Standard can produce slightly different results on the same material owing to differences between quasi-isothermal quasi-static an

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prEN 12753 Viešoji apklausa

Komentavimo iki data 2026-06-23

Paviršiaus apdorojimo įrangos išmetamųjų dujų terminio ir katalizinio valymo sistemos. Saugos reikalavimai

This document specifies machinery safety requirements. This document is applicable to thermal and catalytic cleaning systems with regenerative or recuperative preheating for exhaust gas loaded with flammable substances from surface treatment equipment. This document deals with all significant hazards, hazardous situations or hazardous events relevant to thermal and catalytic cleaning systems for exhaust gas from surface treatment equipment, when these are used as intended and under conditions of misuse which are reasonably foreseeable. See Annex A for significant hazards. The specific significant risks related to the use of this machinery with exhaust gases from sources other than surface treatment equipment (e.g. from chemical production, tank farms, cremation, wastewater treatment) are not dealt with in this document. Limits of thermal and catalytic cleaning systems for exhaust gas from surface treatment equipment are specified by the interfaces given in Figure 1. Figure 1 - Limits of the machinery This document is not applicable to - cleaning systems without preheating of input gas; - cleaning systems for input gas with a concentration of flammable substances higher than those specified in 4.8; - cleaning systems for input gas containing H2 or pyrolysis gases; - cleaning systems for input gas with a O2/N2 ratio higher than in air; - absorptive and adsorptive exhaust gas cleaning systems; - membrane separators; - UV exhaust gas cleaning systems; - filter systems; - plasma exhaust gas cleaning systems; - biological exhaust gas cleaning systems. This document is not applicable to the machinery or machinery components manufactured before the date of its publication.

Skaityti, komentuoti projektą Peržiūrėti metaduomenis

EN 1993-1-2:2024/prA1 Viešoji apklausa

Komentavimo iki data 2026-06-25

Eurokodas 3. Plieninių konstrukcijų projektavimas. 1-2 dalis. Konstrukcijų elgsenos ugnyje skaičiavimas

1.1 Scope of prEN 1993-1-2 (1) This document provides rules for the design of steel structures for the accidental situation of fire exposure. This Part of EN 1993 only identifies differences from, or supplements to, normal temperature design. (2) This document applies to steel structures required to fulfil a loadbearing function. (3) This document does not include rules for separating function. (4) This document gives principles and application rules for the design of structures for specified requirements in respect of the aforementioned function and the levels of performance. (5) This document applies to structures, or parts of structures, that are within the scope of EN 1993 1 1 and are designed accordingly. (6) This document is intended to be used in conjunction with EN 1991-1-2, EN 1993-1-1, EN 1993 1-3, EN 1993-1-4, EN 1993-1-5, EN 1993-1-6, EN 1993-1-7, EN 1993-1-8, EN 1993-1-11, EN 1993-1-13 or EN 1993-1-14. 1.2 Assumptions (1) Unless specifically stated, EN 1990, EN 1991(all parts) and EN 1993-1-1 apply. (2) The design methods given in prEN 1993-1-2 are applicable if - the execution quality is as specified in EN 1090-2 and/or EN 1090-4, and - the construction materials and products used are as specified in prEN 1993-1-1:2020, Table 5.1 and Table 5.2 and in prEN 1993-1-3:2022, Table 5.1 and Table 5.2, or in the relevant material and product specifications. (3) In addition to the general assumptions of EN 1990 the following assumptions apply: - the choice of the relevant design fire scenario is made by appropriate qualified and experienced personnel, or is given by the relevant national regulation; - any fire protection measure taken into account in the design will be adequately maintained.

Skaityti, komentuoti projektą Peržiūrėti metaduomenis

EN IEC 55011:2025/prAA:2026 Viešoji apklausa

Komentavimo iki data 2026-07-22

Pramonės, mokslo ir medicinos įranga. Radijo dažnio trikdžių charakteristikos. Ribinės vertės ir matavimo metodai

This document applies to industrial, scientific and medical electrical equipment operating in the frequency range 0 Hz to 400 GHz and to domestic and similar appliances designed to generate and/or use locally radio-frequency energy. This document covers emission requirements related to radio-frequency (RF) disturbances in the frequency range of 9 kHz to 400 GHz. For ISM RF applications in the meaning of the definition found in the ITU Radio Regulations (2020) (see Definition 3.1.18), this document covers emission requirements related to radio- frequency disturbances in the frequency range of 9 kHz to 18 GHz. ISM equipment which incorporates radio transmit/receive functions ( host equipment with radio functionality) is included in the scope of this document, see Annex F. However, the emission requirements in this document are not intended to be applicable to the intentional transmissions from a radio transmitter as defined by the ITU including their spurious emissions. NOTE 1 This exclusion only applies to emissions from the intentional radio transmitter. However, combination emissions, for example emissions resulting from intermodulation between the radio and the non -radio subassemblies of the ISM equipment, are not subject to this exclusion. NOTE 2 Emission requirements for induction cooking appliances are specified in CISPR 14 -1 [1]1. Requirements for ISM RF lighting equipment and UV irradiators operating at frequencies within the ISM frequency bands defined by the ITU Radio Regulations are contained in this document. Robots used for industrial, scientific and medical applications are in the scope of this document. EXAMPLE Welding robots, spraying robots, handling robots, processing robots, assembly robots, medical robots, education and experimental robots. A comprehensive list of robots in the scope of this document is given on the IEC EMC zone. NOTE 3 Flying robots, domestic helper robots, toy robots and entertainment robots are examples of robots in the scope of other CISPR standards. Equipment covered by other CISPR product and product family emission standards are excluded from the scope of this document.

Skaityti, komentuoti projektą Peržiūrėti metaduomenis

prEN IEC 61076-1:2026 Naujas

Komentavimo iki data 2026-08-12

Elektrinės ir elektroninės įrangos jungtys. Gaminio reikalavimai. 1 dalis. Bendroji specifikacija

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