Abstract

This topic has been submitted as a request for the development of a DIN SPEC according to the PAS procedure. DIN SPECs are developed within DIN-SPEC-consortiums set up on a temporary basis. In the attached business plan you will find detailed information on the planned project as well as concrete time limits for commenting on the business plan (four-week commentary period) and for registering for the kick-off. This document will be developed and approved by the authors named in the business plan. This document is intended to be used as a guideline on the European standardization landscape of metallic industrial valves for hydrogen applications. This DIN SPEC gives guidance on material selection, design, manufacture, and final assessment from the available European standardization for metallic industrial valves by summarizing existing requirements from European standardization and putting them into contextual relationship to each other. This DIN SPEC does not specify any requirements or recommendations outside existing aforementioned European standardization. The provisions contained in this DIN SPEC are intended as a reference for purchasers and manufacturers of metallic industrial valves. This DIN SPEC distinguishes, where possible, between the following services/damage mechanisms, which might exist in combinations:

• Low temperature service;
  • Hydrogen Environmental Embrittlement (HEE) or Hydrogen-induced cracking (HIC);
    • High Temperature Hydrogen Attack (HTHA);
      • Hydrogen service with cyclic loads (fatigue). The DIN SPEC will take into account the difference between gaseous hydrogen (GH2) and liquid hydrogen (LH2), where necessary. The provisions set out in this DIN SPEC do not cover corrosion such as electro-chemical corrosion of metals under participation of hydrogen (e.g. sour gas). The standards on which the provisions of this DIN SPEC are based are 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; NOTE Exclusions are given in the European legislation for pressure equipment.
          • chemical applications, the applicable provisions of EN 12569 apply;
            • gas distribution systems, the applicable provisions of EN 13774 apply;
              • gas transportation systems, the applicable provisions of EN 14141 apply. This DIN SPEC is not applicable to:
                • safety accessories (e.g., bursting disc, safety valve, etc.)
                  • sight glass with its frames (component of a pressure equipment) and
                    • measurement chambers

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Begin

2024-03-26

Planned document number

DIN SPEC 3456

Project number

00300761