PN40

PN40

A PN40 flange has a fixed nominal pressure rating of 40 bar (approximately 580 psi).

Unlike the ASME/ASA system, the PN system uses a single pressure class designation that assumes the maximum pressure is at ambient temperature (around 20°C).
The maximum working pressure for a PN40 flange generally decreases if the temperature rises significantly.
 
Maximum Working Pressure for PN40 Flanges
 
Temperature RangePN40 Max Pressure (bar)
Up to 20°C (Ambient) 40 bar
Above 20°C (e.g., 100°C) Pressure derates based on material

For common materials:
  • Steel (Carbon or Stainless): The 40 bar rating is typically maintained across a wide temperature range if the material allows for it.

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Code Description Price Quantity
FL200RFSO-PN40B 200 MM NB RFSO BOSSED FLG EN1092-1 "PN40"
3 In Stock for despatch
£263.80 (exc VAT) per EACH
£316.56 (inc VAT)
-
+
FL250RFSO-PN40B 250 MM NB RF SO BOS'D FLG EN1092-1 PN40
Out of Stock
£450.00 (exc VAT) per EACH
£540.00 (inc VAT)
-
+
FL300RFSO-PN40B 300 MM NB RF SO BOS'D FLG EN1092-1 "PN40"
Out of Stock
£585.00 (exc VAT) per EACH
£702.00 (inc VAT)
-
+