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prEN 17124 Viešoji apklausa

Komentavimo iki data 2025-08-14

Vandenilio kuras. Produkto specifikacija ir kokybės užtikrinimas, taikomi vandenilio kuro pildymo punktams, kuriuose tiekiamas vandenilis. Transporto priemonėms skirti kuro elementai su protonų mainų membrana

This document specifies the quality characteristics of liquid or gaseous hydrogen fuel dispensed at hydrogen refuelling stations for use in proton exchange membrane (PEM) fuel cell vehicle systems, and the corresponding quality assurance considerations for ensuring uniformity of the hydrogen fuel.

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prEN 18191 Viešoji apklausa

Komentavimo iki data 2025-08-03

Pramoniniai uždarymo ir reguliavimo įtaisai. Papildomieji reikalavimai, keliami metaliniams vandenilio įrangos uždarymo ir reguliavimo įtaisams

This document applies to industrial metallic valves for hydrogen use. It contains recommendations and additional requirements applicable to material selection, design, manufacture, and final assessment. This document addresses the following four services/damage mechanisms, which might exist in combinations: - low temperature applications; - hydrogen environmental embrittlement (HEE) or hydrogen-induced cracking (HIC); - high temperature hydrogen attack (HTHA); - hydrogen service with cyclic loads (fatigue). The document considers the difference between gaseous hydrogen (GH2) and liquid hydrogen (LH2), where necessary. The additional provisions set out in this document do not cover corrosion such as electro-chemical corrosion of metals under participation of hydrogen (e.g. sour gas). This document is based on the requirements contained in the standards specified below: - applications with a maximum allowable pressure PS greater than 0,5 bar in accordance with the European legislation for pressure equipment, the applicable provisions of EN 16668 apply; - additional requirements for valves in chemical and petrochemical applications are specified in EN 12569; - additional requirements for valves in gas distribution systems are specified in EN 13774; - additional requirements for valves in gas transportation systems are specified in EN 14141.

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prEN ISO 19870-1 Viešoji apklausa

Komentavimo iki data 2025-07-15

Vandenilio technologijos. Šiltnamio efektą sukeliančių dujų kiekio, susijusio su vandenilio tiekimo grandine, nustatymo metodika. 1 dalis. Išmetamas kiekis, susijęs su vandenilio gamyba visame gamybos etape (ISO/DIS 19870-1:2025)

ISO 14044 requires the goal and scope of an LCA to be clearly defined and be consistent with the intended application. Due to the iterative nature of LCA, it is possible that the LCA scope needs to be refined during the study. This document specifies methodologies that can be applied to determine the carbon footprint of a product (CFP) or partial CFP of a hydrogen product in line with ISO 14067. The goals and scopes of the methodologies correspond to either approach a) or b), given below, that ISO 14040:2006, A.2 gives as two possible approaches to LCA. a) An approach that assigns elementary flows and potential environmental impacts to a specific product system, typically as an account of the history of the product. b) An approach that studies the environmental consequences of possible (future) changes between alternative product systems. Approaches a) and b) have become known as attributional and consequential, respectively, with complementary information accessible in the ILCD handbook.[1] There are numerous pathways to produce hydrogen from various primary energy sources. This document describes the requirements and evaluation methods applied to several hydrogen production pathways of interest: electrolysis, steam methane reforming (with carbon capture and storage), co-production and coal gasification (with carbon capture and storage), auto-thermal reforming (with carbon capture and storage), hydrogen as a co-product in industrial applications and hydrogen from biomass waste as feedstock. This document also considers the GHG emissions due to the conditioning or conversion of hydrogen into different physical forms and chemical carriers: — hydrogen liquefaction; — production, transport and cracking of ammonia as a hydrogen carrier; — hydrogenation, transport and dehydrogenation of liquid organic hydrogen carriers (LOHCs). This document considers the GHG emissions due to hydrogen and/or hydrogen carriers’ transport up to the consumption gate. It is possible that future revisions of this document will consider additional hydrogen production, conditioning, conversion and transport methods. This document applies to and includes every delivery along the supply chain up to the final delivery to the consumption gate (see Figure 2 in the Introduction). This document also provides additional information related to evaluation principles, system boundaries and expected reported metrics in the form of Annexes A to K, that are accessible via the online ISO portal (https://standards.iso.org/iso/ts/19870/ed-1/en).

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