scope:

This DIN SPEC is applicable to R744 air-conditioning systems and specifies the requirements from the viewpoint of the vehicle manufacturer for quality, strength and service life for refrigerant lines and hoses, as well as the internal heat exchanger (IHX) in the coaxial design that are operated in refrigeration circuits using refrigerant R744, and it also specifies the appropriate tests.

All pressure values within this document are absolute values.

NOTE The DIN Spec does not claim to cover all details and does not replace the development responsibility of the component manufacturers.