The Interpretive Report on Dynamic Analysis of Pressure Components was first listed as WRC Bulletin 246 in February 1979.That report was updated as WRC Bulletin 269 in 1981; more recently, the third edition was issued as WRC Bulletin 303 in 1985.The third edition of the report presented an evaluation of five areas of technical importance to the Pressure Vessel Industry.They were dynamic modeling, pressure systems rupture and protection, pressure transients, seismic analysis and fluid-structure interaction.