1b What is nominal pressure PN (MPA)?
The reference value related to the pressure resistance capacity of piping system components refers to the design given pressure related to the mechanical strength of piping components. The nominal pressure is generally expressed by PN.
(1) Nominal pressure – the compressive strength of the product at the reference temperature, expressed in PN, unit: MPa.
(2) Reference temperature: different materials have different reference temperatures. For example, the reference temperature of steel is
250¡ÃƒÂ£C
(3) Nominal pressure 1.0MPa, recorded as: PN 1.0MPa