Bränslesystem

This document contains requirements for the design, testing, inspection and marking of serially produced, refillable storage systems intended only for liquid hydrogen for land vehicle operation. These storage systems

a) are permanently attached to the vehicle,

b) are vacuum insulated,

c) have a hydrogen pressure retaining structure and vacuum enclosure consisting of metallic materials.

The scope of this document is limited to fuel storage systems containing fuel cell grade hydrogen according to ISO 14687 type II grade D. The content is mainly focused on heavy duty vehicles for road operation but may also be applied to on-board fuel storage systems for other road vehicles, industrial and other land vehicles with due consideration of appropriate service conditions.

This document specifies the requirements for rubber O-rings and their housing dimensions, which seal gaseous hydrogen, in high-pressure hydrogen devices for gaseous hydrogen fuelling stations, such as valves, filters, joints, breakaways and other such devices. This document is applicable to O-rings suitable for sealing hydrogen gas of up to 70 MPa nominal working pressure, in the operating temperature range of −40 °C to 65 °C.

This document contains safety requirements for the design of O-rings and their housing dimensions, compound design, and test methods for seal systems. This document applies to newly manufactured O-rings for hydrogen gas seal in high-pressure hydrogen devices used in hydrogen fuelling stations.

NOTE 1       This document was developed using the ISO 3601 series.

NOTE 2       This document was developed based on several temperature classes of rubber O-rings suitable for use with high-pressure hydrogen seals in devices for gaseous hydrogen stations.

NOTE 3       The operating temperature is not a temperature of the hydrogen gas to be sealed by the O-ring gas seal system. Regardless of the operating temperature, the hydrogen gas temperature to be sealed can rise up to 180 °C.

NOTE 4       The O-ring seal system for the high-pressure hydrogen devices are designed by the device manufacturers. The detailed specifications of the O-rings and design of static or non-static high-pressure hydrogen seal systems for the high-pressure hydrogen devices are determined as agreed upon between the interested parties by referring to this document.