ISO 19880-1 pdf free download
ISO 19880-1-2020 pdf free download.Gaseous hydrogen一Fuelling stations – Part 1: General requirements.
7.3 Hydrogen storage recommendations
7.3.1 General
Liquid hydrogen delivery and storage system requirements are defined in 6.2.2. and gaseous hydrogen storage requirements are defined below.
7.3.2 Gaseous hydrogen storage vessels
Storage vessels for the storage of hydrogen gas should be manufactured in accordance with a commonly used national/regional standard and designed for the anticipated cycle life. Buffer storage may include hydrogen absorbed in a metal hydride storage system.
If buffer storage vessels of different design pressures are interconnected, they shall be protected in such a way that vessels rated for a lower pressure cannot be over-pressurized due to any malfunction.
The design of the buffer storage installation shall include appropriate means to prevent failure in the case of fire when deemed necessary by risk assessment. Suitable prevention methods may include one or more of the following:
— product venting systems, such as thermally activated pressure relief devices (TPRDs);
— thermal shielding or fire barrier;
— inability for a flammable liquid to pool under the vessel;
— fixed firewater protection.
NOTE 1 Composite storage vessels can require increased protection compared to metallic vessels.
The vessel(s) shall be secured to the foundation, with the foundation and supports able to withstand the forces that can be anticipated for the location.
The layout design of the gaseous hydrogen buffer storage vessels and piping shall consider the risk from direct impingement of jet flames from potential leak points or vents onto an adjacent vessel. The station risk assessment shall include mitigation considerations about deflagration to detonation transition (DDTJ in the compressed hydrogen storage area.
Each group of buffer storage vessels that may be isolated with manual or automatic valves, should be equipped with their own set of safety devices.
NOTE 2 When hydrogen is delivered in transportable cylinders, tube trailers or MEGCs, safety relief devices within the cylinder/group of vessels are not always included.
However, when transportable cylinders, tube trailers or MEGCs are incorporated into a fuelling station, following appropriate risk assessment that addresses the potentially different design considerations, particularly pressure cycling, any on-site compression system that may compress hydrogen into such a system should include a set of safety devices to protect the storage tube(s) from over-pressurization.
7.3.3 Gaseous hydrogen storage siting recommendations
7.3.3.1 Ground storage
When stored above ground, gaseous hydrogen buffer storage vessels or assemblies shall be situated in the open air or a suitable enclosure or building (see 5.3.6.3).
The foundation for a gaseous hydrogen storage vessel shall be appropriate to accommodate the weight of the equipment placed on it and shall be made of concrete or any other suitable non-combustible material. Foundations for gaseous hydrogen storage vessels should be designed and constructed to prevent frost heaving where applicable. In addition, if onsite hydro-testing is anticipated, then the foundation shall be designed to withstand the weight of the vessel when filled with water.
7.3.3.2 Buried underground storage
Buried hydrogen storage vessels shall be adequately protected against corrosion.
Buried process connections shall be installed in accordance with 22.
The design and installation of the buried hydrogen storage shall take into account requirements for
maintenance and inspection (see 14.9).
7.3.3.3 Below ground vaults
It is presupposed that below-ground vaults constructed on-site are designed in accordance with a national building code. Inspections should be conducted to verify structural strength and compliance of the installation with the approved design. Consideration should be given to soil and hydrostatic loading on the floors, walls and roof, anticipated seismic forces, uplifting by ground water or flooding, and to loads imposed from above, such as traffic and equipment loading on the vault roof.
The vault walls should be higher than the gaseous hydrogen buffer storage vessels contained therein. There should be no openings in the vault enclosure except those necessary for access to, inspection of, and filling, emptying, ventilation, and venting of the gaseous hydrogen buffer storage vessels.
Ventilation or other measures shall be provided to prevent accumulation of leaked hydrogen gas.
Ingress of water shall be prevented, or a drainage system to manage water ingress shall be provided. If installed at grade and subject to vehicle loading, the top shall have a metal grating or another roof with sufficient strength to carry vehicle loading.
If manual intervention is required for safe operation or in an emergency, manually operated valves or controls should be located above ground and accessible to authorized personnel only.ISO 19880-1 pdf download.
