ASME B16.5 - Pipe Flanges and Flanged Fittings
NPS 1/2 through NPS 24, Metric/Inch Standard
Data tables
Fast flange data.
Download Flange Bolt Chart.
About the specification
The ASME B16.5 standard, titled "Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard," details critical specifications for pipe flanges and flanged fittings. It encompasses:
- Flanges in rating classes 150, 300, 400, 600, 900, and 1500 for sizes NPS 1/2 to NPS 24, and class 2500 flanges for sizes NPS 1/2 to NPS 12. Specifications are provided in both metric and U.S. Customary units, with bolt diameters and flange bolt hole sizes in inches.
- Flanged fittings in rating classes 150 and 300 for sizes NPS 1/2 to NPS 24, featuring requirements in both metric and U.S. Customary units, including inch-based measurements for bolt diameters and flange bolt holes.
- Flanged fittings in classes 400, 600, 900, and 1500 for sizes NPS 1/2 to NPS 24, and class 2500 fittings for sizes NPS 1/2 to NPS 12, as noted in Non-Mandatory Appendix E. These fittings are detailed using U.S. Customary units exclusively.
B16.5 focuses on flanges and flanged fittings made of cast or forged materials, along with specific types of blind flanges and reducing flanges made from cast, forged, or plate materials. The standard also provides guidelines on flange bolting, gaskets, and joints.
ASME B16.5 should be used in conjunction with related ASME B16 Series Standards and other ASME standards, like the Boiler and Pressure Vessel Code and the B31 Piping Codes. Adhering to these B16 Standards ensures compliance with local regulations and helps in achieving operational efficiency, cost-effectiveness, and safety, based on industry best-practices.
ASME B16.5 is essential for manufacturers, owners, employers, users, and others involved in the specification, purchase, maintenance, training, and safe usage of valves and pressure equipment, as well as applicable regulatory authorities.