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Upcoming Events All PSSP eBrochures Due Exhibitor Registration Closes Upcoming Events All PSSP eBrochures Due Exhibitor Registration Closes 55th ANNUAL CONFERENCE May 69 2025Seattle Washington Featuring renowned scientists and authors honoring their contributions to the pipeline simulation industry. Days Hours Minutes Seconds About The Pipeline Simulation Interest Group PSIG was formed in 1969. Its purpose is to facilitate the interchange of information and to advance the state of the art in modeling simulation optimization steadystate and transient flows single and multiphase flows and related subjects as applied to fluid pipeline systems. PSIG is an independent group and is not affiliated with any other organization.