This International Standard specifies the minimum requirements for the design, manufacture and testing of pumps for cryogenic service. This International Standard is applicable to centrifugal pumps. However it may be applied to other types of cryogenic pumps (e.g. reciprocating pumps), where applicable. This International Standard also gives guidance on the design of installations (see Annex A). It does not specify requirements for operation or maintenance. NOTE For cryogenic fluids, see ISO 21029-1, ISO 20421-1 and/or ISO 21009-1.