Unit verification is the process of verifying the design of single items of equipment, providing assurance that it meets the required specification.
Typically skid based system, large pressurized equipment and equipment to be used in critical location/site lends itself to unit verification.
Unit verification facilitates certification for companies who are only ever going to make one item of this equipment, and don’t require a full EC Type Examination certificate .
Unit verification is designed for certification of individual units. If you are planning to manufacture another unit exactly the same as the certified one (perhaps some time in the future), under unit verification this new unit will require a new certificate.