ANSI/CSA HGV 4.5-2013
Priority and sequencing equipment for hydrogen vehicle fueling
The expanding hydrogen industry identified the need for a standard addressing priority and sequencing equipment, which is part of a hydrogen gas vehicle fueling system. This standard ANSI/CSA HGV 4.5-2013 Priority and Sequencing Equipment for Hydrogen Vehicle Fueling establishes requirements for the performance of priority equipment (which controls the order in which a hydrogen gas compressor fills the storage tanks) and sequencing equipment (which controls the order in which the storage tanks are used to fill a vehicle). Equipment shall be suitable as a minimum for operation at ambient temperatures of -40°C (-40°F) to 60°C (140°F).
This publication represents a standard for requirements for priority and sequencing equipment, which is part of a hydrogen gas vehicle fueling system.
This standard is based on engineering principles, research and the combined expertise of manufacturers, users, and others having specialized experience.
Nothing in this standard is to be considered in any way as indicating a measure of quality beyond compliance with the provisions it contains. It is designed to allow compliance of products which may exceed that specified in the provisions herein. In its preparation, full recognition has been given to possibilities of improvement through ingenuity of design. This standard is subject to revision as further experience and investigation may show it is necessary and desirable.
CSA, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. CSA shall not incur any obligation or liability for damages, including consequential damages, arising out of or in connection with the use, interpretation of or reliance upon this standard.
Users of this American National Standard are advised that the devices/products/activities within its scope may be subject to regulation at the federal, state, or local levels. Users are strongly urged to investigate this possibility through appropriate channels. In the event of a conflict with this standard, the federal, state, or local regulations should be followed.
These requirements apply to priority and sequencing equipment (see Part IV - Definitions) which is part of a hydrogen gas vehicle fueling system, hereinafter referred to as equipment.
Priority and sequencing equipment of a type not specifically addressed in these requirements may be subjected to such examinations and tests as deemed necessary by the testing agency to determine compliance with the intent of these requirements.
If a value for measurement, as given in these requirements, is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.