On this page 5 sections
What ASME B16.5 covers
Standard at a glance
- Standard
- ASME B16.5
- Issued by
- ASME
- Product form
- Flanges
- Grades on site
- —
Dimensions, tolerances, markings and pressure-temperature ratings for flanges from NPS ½" to 24" in Classes 150 to 2500, by material group.
Key requirements
- Classes 150, 300, 400, 600, 900, 1500, 2500
- Pressure-temperature ratings by material group
- Facing types RF, FF, RTJ
- Bolting dimensions
Summary for procurement guidance. Refer to the current edition of the standard for full requirements.
Ordering to ASME B16.5
- State "ASME B16.5" and the edition if your project requires it
- Grade / designation and product dimensions
- Supplementary requirements (tests, heat treatment, certification)
- Certificate type: EN 10204 3.1 or 3.2
Frequently asked questions
What does ASME B16.5 cover?
Dimensions, tolerances, markings and pressure-temperature ratings for flanges from NPS ½" to 24" in Classes 150 to 2500, by material group.
Which grades are covered by ASME B16.5?
It is a dimensional or documentation standard that applies across grades.
Do you supply material certified to ASME B16.5?
Yes. Material is supplied to ASME B16.5 with EN 10204 3.1 certificates (3.2 on request), where the mill certifies to it.