Description: duration of operation between consecutive failures of a functional unit under given conditions; Name: otbf
Description: Operating time between consecutive failures ; Name: Operating time between failures
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