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The International Association for the Properties ofWater and Steam NOW AVAILABLEMeeting information and registration for the 2025 IAPWS Annual Meeting to be held in Helsinki Finland June 2227 2025. IAPWS is an international nonprofit association of nationalorganizations concerned with the properties of water and steamparticularly thermophysical properties cycle chemistry guidelines and other aspectsof hightemperature steam water and aqueousmixtures relevant to thermal power cycles and other industrial and scientificapplications. IAPWS objectives are Interested individuals whether or not they reside in a member country of IAPWSare welcome to participate in the various IAPWSWorking Groups. This page updated February 3 2025 .