ISO 5149-2:2026

Refrigerating systems and heat pumps — Safety and environmental requirements — Part 2: Design, construction, testing, marking and documentation ISO 5149-2:2026

Publication date:   Nov 5, 2026

Scope

This document specifies the design, construction and installation of refrigerating systems, including piping, components, materials and ancillary equipment directly associated with such systems, which are not covered in ISO 5149-1, ISO 5149-3, or ISO 5149-4. It also specifies requirements for testing, commissioning, marking and documentation. Requirements for secondary heat-transfer circuits are excluded except for any safety devices associated with the refrigerating system.
This document is applicable to new refrigerating systems, extensions or modifications of already existing systems, and for used systems, being transferred to and operated on another site.
This document is applicable to:

refrigerating systems, stationary or mobile, of all sizes, except vehicle air conditioning systems covered by a specific product standard; NOTE            Example of specific product standard is ISO 13043 and SAE J 639.
secondary cooling or heating systems;
the location of the refrigerating systems;
replaced parts and added components after the adoption of this document, if they are not identical in function and in capacity;
the conversion of a system for another refrigerant.

This document does not apply to goods in storage, with respect to spoilage or contamination.