Description: temperature to which a particular piece of equipment is subjected during normal operation; Name: operating temperature 
Description: Temperature determined by the given application and fluid. ; Name: Working temperature
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