Description: time period during which all the performance requirements are met; Name: usefull life
Description: Time interval from first use until the instant when a limiting state is reached ; Name: useful life
Description: PN (nominal pressure) is an alphanumeric variable for reference purposes, relating to a combination of mechanical and measurement properties of a pipe component. It comprises the letters PN followed by a dimensionless number (according to EN 1333/96.08); Name: Nominal pressure of the muffs, A1