Standartų projektų sąrašas

prEN 12667 Viešoji apklausa

Komentavimo iki data 2025-12-18

Šiluminės statybinių medžiagų ir gaminių savybės. Šiluminės varžos nustatymas apsaugotos karštosios plokštės ir šilumos srauto matuoklio metodais. Didelės ir vidutinės šiluminės varžos gaminiai

This document specifies principles and testing procedures for determining, by means of the guarded hot plate or heat flow meter methods, the thermal resistance of dry test specimens having a thermal resistance of not less than 0,5 m2·K/W. NOTE 1 The above limit is due to the effect of contact thermal resistances. An upper limit for measurable thermal resistance depends upon a number of factors described in this document, but a unique figure cannot be assigned. It applies in principle to any mean test temperature, but the equipment design in Annex D is essentially intended to operate between a minimum cooling unit temperature of -100 °C and maximum heating unit temperature of +100 °C. NOTE 2 Limits to the mean test temperature are only imposed by the materials used in the apparatus construction and by ancillary equipment. This document does not supply general guidance and background information (e.g. the heat transfer property to be reported, product-dependent specimen preparations, procedures requiring multiple measurements, such as those to assess the effect of specimen non-homogeneities, those to test specimens whose thickness exceeds the apparatus capabilities, and those to assess the relevance of the thickness effect). This document does not apply to cover measurements on moist products of any thermal resistance or measurements on thick products of high and medium thermal resistance.

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prEN 12664 Viešoji apklausa

Komentavimo iki data 2025-12-18

Šiluminės statybinių medžiagų ir gaminių charakteristikos. Šiluminės varžos nustatymas apsaugotos karštosios plokštės ir šilumos srauto matuoklio metodais. Vidutinės ir mažos šiluminės varžos sausi ir drėgni gaminiai

This document specifies principles and testing procedures for determining, by means of the guarded hot plate or heat flow meter methods, the thermal resistance of test specimens either in the dry state or conditioned to equilibrium with moist air, having a thermal resistance of not less than 0,1 m2·K/W and a (hygro)thermal transmissivity or thermal conductivity up to 2,0 W/(m·K). NOTE The lower limit for measurable thermal resistance is due to the effect of contact thermal resistances, which require special testing techniques described in this document. Although this document can be used for testing dry specimens of high and medium thermal resistance, i.e. on products having a thermal resistance, that is, on products with a thermal resistance of at least 0.5 m².K/W, the simpler procedures of EN 12667[3] are available for such specimen. This document does not cover methods to assess the hygrothermal transmissivity of materials in the over-hygroscopic range (i.e. when free liquid water occurs in the material in general above 95% of moisture). It applies in principle to any mean test temperature, but the equipment design in Annex D is essentially intended to operate between a minimum cooling unit temperature of -100 °C and maximum heating unit temperature of +100 °C. This document does not supply general guidance and background information (e.g. the heat transfer property to be reported, product-dependent specimen preparations, suggested materials for vapour-tight envelopes when testing moist specimens, procedures requiring multiple measurements, such as those to assess the effect of specimen non-homogeneities, those to test specimens whose thickness exceeds the apparatus capabilities, and those to assess the relevance of the thickness effect).

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prEN 12390-12 Viešoji apklausa

Komentavimo iki data 2025-12-18

Sukietėjusio betono bandymai. 12 dalis. Betono atsparumo karbonizacijai nustatymas. Pagreitintos karbonizacijos metodas

This document describes a method for evaluating the carbonation resistance of concrete using test conditions that accelerate carbonation. After a defined period of curing and a period of preconditioning, the test is carried out under controlled exposure conditions using an increased level of carbon dioxide. NOTE The test performed under reference conditions takes a minimum of 112 days comprising a minimum age of the specimen prior to curing under water of 28 days, a minimum preconditioning period of 14 days and an exposure period to increased carbon dioxide level of 70 days. This procedure is not a method for the determination of carbonation depths in existing concrete structures.

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prEN 12390-10 Viešoji apklausa

Komentavimo iki data 2025-12-18

Sukietėjusio betono bandymai. 10 dalis. Betono atsparumo karbonizacijai esant atmosferinei anglies dioksido koncentracijai nustatymas

This document specifies a method of determining the carbonation rate of a concrete, expressed in mm/√a. This document establishes a procedure where a standardized climate controlled chamber is used and where specimens are placed on a natural exposure site protected from direct rainfall. The standardized climate controlled chamber procedure is the reference method. These procedures are applicable for the initial testing of concrete, including those manufactured with slowly reacting binders, provided that the ages at which the carbonation depth is measured, the number of measurements required to calculate the carbonation rate, as well as the length of exposure to CO2, are appropriately selected, as described in this document. These procedures are not applicable for factory production control.

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prEN 12390-11 Viešoji apklausa

Komentavimo iki data 2025-12-18

Sukietėjusio betono bandymai. 11 dalis. Betono atsparumo chloridams nustatymas esant vienkryptei difuzijai

This document describes a method for determining the unidirectional apparent chloride diffusion coefficient and surface concentration of conditioned specimens of hardened concrete. The test method enables the determination of the chloride penetration after a specified length of curing and length of exposure to NaCl solution. Since resistance to chloride penetration depends on ageing which includes the effects of continual hydration and interactions with the chloride solution, then the apparent diffusion coefficient also changes with age. A procedure to determine this ageing, expressed here by an ageing exponent, is included in this document and described in Annex A. The test procedure does not apply to concrete with surface treatments such as silanes and it does not apply to concrete containing fibres (see E.1).

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prEN 13157 Viešoji apklausa

Komentavimo iki data 2025-12-18

Kranai. Sauga. Kranai su rankine pavara

This document specifies requirements for the following hand powered cranes defined in Clause 3: - hand chain blocks; - lever hoists; - jaw winches; - hand powered trolleys supporting lifting machines; NOTE Hand powered trolleys placed on the market on their own and intended to be used with products within the scope of this document are considered as interchangeable equipment as defined in Directive 2006/42/EC. - drum winches; - pulley blocks. This document deals with the following significant hazards, hazardous situations or hazardous events relevant to hand powered cranes, when it is used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer: - mechanical hazards; - thermal hazards; - material/substance hazards; - ergonomic hazards; - hazards associated with the environment in which they are used. This document does not cover hazards related to the lifting of persons. This document is not applicable to hand powered cranes for: - use in ambient temperature outside the range of - 10°C to + 50°C, however for some lifting medium the minimum temperature will be higher than −10 °C; - use in direct contact with food stuffs or pharmaceuticals requiring a high level of cleanliness for hygiene reasons; - handling specific hazardous materials (e.g. explosives, hot molten masses, radiating materials); - operation in an explosive atmosphere. This document is not applicable to hand powered cranes manufactured before the date of its publication.

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prEN ISO 8536-5 Viešoji apklausa

Komentavimo iki data 2025-12-18

Medicinoje naudojama infuzijos įranga. 5 dalis. Vienkartinės biuretinės savitakio tiekimo infuzijos sistemos (ISO 8536-5:2025)

ISO 8536-5:2004 specifies requirements for types of single-use, gravity feed burette infusion sets of 50 ml, 100 ml and 150 ml nominal capacity for medical use in order to ensure compatibility of use with containers for infusion solutions and intravenous equipment. ISO 8536-5:2004 also provides guidance on specifications relating to the quality and performance of materials. In some countries, national pharmacopoeia or other national regulations are legally binding and take precedence over ISO 8536-5:2004.

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prEN IEC 63418:2025/prAA:2025 Viešoji apklausa