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ASME

ASME B16.5

Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24

Issuing body
ASME
Latest edition
2020 Edition
Region
USA, Global
Equipment items
5

Scope

Flange dimensions, ratings, materials and tolerances for NPS 1/2–24, Class 150–2500.

Key requirements (8)

  • Pipe flanges & flanged fittings for NPS 1/2 to 24.
  • Pressure classes: 150, 300, 400, 600, 900, 1500, 2500.
  • Class 150 CS: 285 psig at 100 °F, 200 psig at 400 °F.
  • Class 300 CS: 740 psig at 100 °F, 555 psig at 700 °F.
  • Flange types: weld neck, slip-on, socket weld, threaded, lap joint, blind.
  • Facing types: raised face (RF), ring-type joint (RTJ), flat face (FF).
  • Bore matching: weld neck bore selected to match pipe schedule.
  • Hydrotest: per pressure class temperature/pressure rating chart.

Related standards (3)

Applied to 5 equipment items

Materials, Welding & Coatings