Piping Systems and Applications! - Resources, Tools and Basic Information for Engineering and Design.
ASME/ANSI B16.5-1996 Pipe Flanges and Flanged Fittings - Class 150 Flanges - outside and inside diameters, bolt circles, numbers and diameters of bolts
Sponsored Links
ASME/ANSI B16.5-1996 Pipe Flanges and Flanged Fittings - Class 150 Flanges - outside and inside diameters, bolt circles, numbers and diameters of bolts for Weld neck, Threaded, Slip-on, Lap joint, Socket weld and Blind flanges.
Carbon and stainless steel qualities according ASME B16.5 Table 1A.
| Pipe Size
(inches) |
Outside Diameter
(inches) |
Inside Diameter
(inches) |
Number of Bolt Holes | Bolt Hole Diameter
(inches) 1) |
Bolt Circle
(inches) |
| 1/2 | 3-1/2 | 0.88 | 4 | 5/8 | 2-3/8 |
| 3/4 | 3-7/8 | 1.09 | 4 | 5/8 | 2-3/4 |
| 1 | 4-1/4 | 1.36 | 4 | 5/8 | 3-1/8 |
| 1-1/4 | 4-5/8 | 1.70 | 4 | 5/8 | 3-1/2 |
| 1-1/2 | 5 | 1.95 | 4 | 5/8 | 3-7/8 |
| 2 | 6 | 2.44 | 4 | 3/4 | 4-3/4 |
| 2-1/2 | 7 | 2.94 | 4 | 3/4 | 5-1/2 |
| 3 | 7-1/2 | 3.57 | 4 | 3/4 | 6 |
| 3-1/2 | 8-1/2 | 4.07 | 8 | 3/4 | 7 |
| 4 | 9 | 4.60 | 8 | 3/4 | 7-1/2 |
| 5 | 10 | 5.66 | 8 | 7/8 | 8-1/2 |
| 6 | 11 | 6.72 | 8 | 7/8 | 9-1/2 |
| 8 | 13-1/2 | 8.72 | 8 | 7/8 | 11-3/4 |
| 10 | 16 | 10.88 | 12 | 1 | 14-1/4 |
| 12 | 19 | 12.88 | 12 | 1 | 17 |
| 14 | 21 | 14.14 | 12 | 1-1/8 | 18-3/4 |
| 16 | 23-1/2 | 16.16 | 16 | 1-1/8 | 21-1/4 |
| 18 | 25 | 18.18 | 16 | 1-1/4 | 22-3/4 |
| 20 | 27-1/2 | 20.20 | 20 | 1-1/4 | 25 |
| 24 | 32 | 24.25 | 20 | 1-3/8 | 29-1/2 |
1) Recommended bolts are 1/8 smaller than the nominal bolt hole diameters shown.
Sponsored Links
Difficult to find your favorite ToolBox page? Add a link to the page in your own personal Shortlist!
Translate this page to
Spanish
French
German
Italian
Dutch
Norwegian
© The Piping ToolBox
The content in The Piping ToolBox is copyrighted but can be used with NO WARRANTY or LIABILITY. Important information should always be double checked with alternative sources. All applicable national and local regulations and practices concerning this aspects must be strictly followed and adhered to.
We appreciate any comments and tips on how to make The Piping ToolBox a better information source. Please contact us by email if You find any faults, inaccurate, or otherwise unacceptable information.
5 12 1
View Engineering, Design and Construction news in the absolute FREE Automatic WebSite Viewer. Engineering Breaking News!
