ÖNORM EN 1251-3

This European Standard specifies operational requirements for transportable vacuum insulated cryogenic vessels of not more than 1 000 litres volume designed to operate above atmospheric pressure. Appropriate parts may be used as a guidance for a vessel design to operate open to the atmosphere. For small cryogenic vessels specially designed for personal medical use, this standard can be used as a guide only. The scope includes putting into service, filling, withdrawal, transport within the location, storage, maintenance, periodic inspection and emergency procedures. Operational requirements for vessels used on public roads, sea and air are not covered. For the transportation of these vessels by public road, rail, sea and air, other requirements apply; these are defined in specific regulations. This standard applies to vessels for cryogenic fluids as specified in EN 1251-1. The additional requirements for flammable fluids are detailed in clause 16. For existing small transportable cryogenic vessels, see annex C.