Heat exchangers — Verification of thermal balance of water-fed or steam-fed primary circuits — Principles and test requirements

A number of suitable arrangements of test apparatus are illustrated in the annex. ISO 3147 is applicable to tests of primary circuits performed in the steady-state condition, in accordance with the specifications laid down for each type of appliance in the relevant International Standards. Where appropriate, special arrangements required for certain types of appliance may also be given in these International Standards.