THREADED FLANGE
THREADED FLANGE
Threaded flanges are joined to pipes by screwing the pipe (which has a male thread, generally NPT per ASME B1.20.1) onto the flange, without seam welds (in certain cases, though, small welds are applied to increase the strength of the connection).
Threaded flanges are available in sizes up to 4 inches and multiple pressure ratings, however, they are used, mostly, small size piping in low pressure and low-temperature applications, like water and air utility services.
Threaded Flanges are also known as screwed flange, and it is having a thread inside the flange bore which fits on the pipe with matching male thread on the pipe. This type of joint connection is speedy and simple but not suitable for high presser and temperature applications. Threaded Flanges are mostly used in utility services such as air and water.
- Threaded Flange mostly used in utility services such as air and water
- It is not suitable for high presser and temperature applications
- It also available in limited Size of NPS 4” and below
- Threaded Flanges can be FF or RF
- It is a Low-cost flange.
The charts show the dimensions of threaded flange class 150, 300, 400, 900, 1500, 2500 in inches and in millimeters.
THREADED FLANGE DIMENSIONS IN INCHES
THREADED CLASS 150
Threaded flange dimensions class 150 in inches (ASME B16.5)
| FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 0.93″ | 3.50″ | 2.38″ | 1.38″ | .063″ | 1.19″ | .62″ | .38″ | .56″ | .62″ | 4 |
| 3/4″ | 1.14″ | 3.88″ | 2.75″ | 1.69″ | .063″ | 1.50″ | .62″ | .44″ | .56″ | .62″ | 4 |
| 1″ | 1.41″ | 4.25″ | 3.12″ | 2.00″ | .063″ | 1.94″ | .69″ | .50″ | .63″ | .62″ | 4 |
| 1-1/4″ | 1.75″ | 4.62″ | 3.50″ | 2.50″ | .063″ | 2.31″ | .81″ | .56″ | .75″ | .62″ | 4 |
| 1-1/2″ | 1.99″ | 5.00″ | 3.88″ | 2.88″ | .063″ | 2.56″ | .88″ | .62″ | .82″ | .62″ | 4 |
| 2″ | 2.50″ | 6.00″ | 4.75″ | 3.62″ | .063″ | 3.06″ | 1.00″ | .69″ | .94″ | .75″ | 4 |
| 2-1/2″ | 3.00″ | 7.00″ | 5.50″ | 4.12″ | .063″ | 3.56″ | 1.12″ | .82″ | 1.06″ | .75″ | 4 |
| 3″ | 3.63″ | 7.50″ | 6.00″ | 5.00″ | .063″ | 4.25″ | 1.19″ | .88″ | 1.13″ | .75″ | 4 |
| 3-1/2″ | 4.13″ | 8.50″ | 7.00″ | 5.50″ | .063″ | 4.81″ | 1.25″ | .88″ | 1.19″ | .75″ | 8 |
| 4″ | 4.63″ | 9.00″ | 7.50″ | 6.19″ | .063″ | 5.31″ | 1.31″ | .88″ | 1.25″ | .75″ | 8 |
| 5″ | 5.69″ | 10.00″ | 8.50″ | 7.31″ | .063″ | 6.44″ | 1.44″ | .88″ | 1.38″ | .88″ | 8 |
| 6″ | 6.75″ | 11.00″ | 9.50″ | 8.50″ | .063″ | 7.56″ | 1.56″ | .94″ | 1.50″ | .88″ | 8 |
| 8″ | 8.75″ | 13.50″ | 11.75″ | 10.62″ | .063″ | 9.69″ | 1.75″ | 1.06″ | 1.69″ | .88″ | 8 |
| 10″ | 10.88″ | 16.00″ | 14.25″ | 12.75″ | .063″ | 12.00″ | 1.94″ | 1.13″ | 1.88″ | 1.00″ | 12 |
| 12″ | 12.94″ | 19.00″ | 17.00″ | 15.00″ | .063″ | 14.38″ | 2.19″ | 1.19″ | 2.13″ | 1.00″ | 12 |
| 14″ | 14.19″ | 21.00″ | 18.75″ | 16.25″ | .063″ | 15.75″ | 2.25″ | 1.32″ | 2.19″ | 1.12″ | 12 |
| 16″ | 16.19″ | 23.50″ | 21.25″ | 18.50″ | .063″ | 18.00″ | 2.50″ | 1.38″ | 2.44″ | 1.12″ | 16 |
| 18″ | 18.19″ | 25.00″ | 22.75″ | 21.00″ | .063″ | 19.88″ | 2.69″ | 1.50″ | 2.63″ | 1.25″ | 16 |
| 20″ | 20.19″ | 27.50″ | 25.00″ | 23.00″ | .063″ | 22.00″ | 2.88″ | 1.63″ | 2.83″ | 1.25″ | 20 |
| 22″ | 22.19″ | 29.50″ | 27.25″ | 25.25″ | .063″ | 24.25″ | 3.13″ | 1.75″ | 3.07″ | 1.38″ | 20 |
| 24″ | 24.19″ | 32.00″ | 29.50″ | 27.25″ | .063″ | 26.12″ | 3.25″ | 1.82″ | 3.19″ | 1.38″ | 20 |
THREADED CLASS 300
Threaded flange dimensions class 300 in inches (ASME B16.5)
| FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 0.93″ | 3.75″ | 2.62″ | 1.38″ | .063″ | 1.50″ | 0.88″ | 0.50″ | 0.82″ | 0.62″ | 4 |
| 3/4″ | 1.14″ | 4.62″ | 3.25″ | 1.69″ | .063″ | 1.88″ | 1.00″ | .056″ | 0.94″ | 0.75″ | 4 |
| 1″ | 1.41″ | 4.88″ | 3.50″ | 2.00″ | .063″ | 2.12″ | 1.06″ | 0.63″ | 1.00″ | 0.75″ | 4 |
| 1-1/4″ | 1.75″ | 5.25″ | 3.88″ | 2.50″ | .063″ | 2.50″ | 1.06″ | 0.69″ | 1.00″ | 0.75″ | 4 |
| 1-1/2″ | 1.99″ | 6.12″ | 4.50″ | 2.88″ | .063″ | 2.75″ | 1.19″ | 0.75″ | 1.13″ | 0.88″ | 4 |
| 2″ | 2.50″ | 6.50″ | 5.00″ | 3.62″ | .063″ | 3.31″ | 1.31″ | 0.82″ | 1.25″ | 0.75″ | 8 |
| 2-1/2″ | 3.00″ | 7.50″ | 5.88″ | 4.12″ | .063″ | 3.94″ | 1.50″ | 0.94″ | 1.44″ | 0.88″ | 8 |
| 3″ | 3.63″ | 8.25″ | 6.62″ | 5.00″ | .063″ | 4.62″ | 1.69″ | 1.06″ | 1.63″ | 0.88″ | 8 |
| 3-1/2″ | 4.13″ | 9.00″ | 7.25″ | 5.50″ | .063″ | 5.25″ | 1.75″ | 1.13″ | 1.69″ | 0.88″ | 8 |
| 4″ | 4.63″ | 10.00″ | 7.88″ | 6.19″ | .063″ | 5.75″ | 1.88″ | 1.19″ | 1.82″ | 0.88″ | 8 |
| 5″ | 5.69″ | 11.00″ | 9.25″ | 7.31″ | .063″ | 7.00″ | 2.00″ | 1.32″ | 1.94″ | 0.88″ | 8 |
| 6″ | 6.75″ | 12.50″ | 10.62″ | 8.50″ | .063″ | 8.12″ | 2.06″ | 1.38″ | 2.00″ | 0.88″ | 12 |
| 8″ | 8.75″ | 15.00″ | 13.00″ | 10.62″ | .063″ | 10.25″ | 2.44″ | 1.56″ | 2.38″ | 1.00″ | 12 |
| 10″ | 10.88″ | 17.50″ | 15.25″ | 12.75″ | .063″ | 12.62″ | 2.62″ | 1.82″ | 2.56″ | 1.12″ | 16 |
| 12″ | 12.94″ | 20.50″ | 17.75″ | 15.00″ | .063″ | 14.75″ | 2.88″ | 1.94″ | 2.82″ | 1.25″ | 16 |
| 14″ | 14.19″ | 23.00″ | 20.25″ | 16.25″ | .063″ | 16.75″ | 3.00″ | 2.06″ | 2.94″ | 1.25″ | 20 |
| 16″ | 16.19″ | 25.50″ | 22.50″ | 18.50″ | .063″ | 19.00″ | 3.25″ | 2.19″ | 3.19″ | 1.38″ | 20 |
| 18″ | 18.19″ | 28.00″ | 24.75″ | 21.00″ | .063″ | 21.00″ | 3.50″ | 2.32″ | 3.44″ | 1.38″ | 24 |
| 20″ | 20.19″ | 30.50″ | 27.00″ | 23.00″ | .063″ | 23.12″ | 3.75″ | 2.44″ | 3.69″ | 1.38″ | 24 |
| 22″ | 22.19″ | 33.00″ | 29.25″ | 25.25″ | .063″ | 25.25″ | 4.00″ | 2.57″ | 3.94″ | 1.63″ | 24 |
| 24″ | 24.19″ | 36.00″ | 32.00″ | 27.25″ | .063″ | 27.62″ | 4.19″ | 2.69″ | 4.13″ | 1.62″ | 24 |
THREADED CLASS 400
Threaded flange dimensions class 400 in inches (ASME B16.5)
| FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 0.93″ | 3.75″ | 2.62″ | 0.12″ | .250″ | 1.50″ | 1.13″ | 0.56″ | 0.88″ | 0.62″ | 4 |
| 3/4″ | 1.14″ | 4.62″ | 3.25″ | 0.12″ | .250″ | 1.88″ | 1.25″ | 0.62″ | 1.00″ | 0.75″ | 4 |
| 1″ | 1.41″ | 4.88″ | 3.50″ | 0.12″ | .250″ | 2.12″ | 1.31″ | 0.69″ | 1.06″ | 0.75″ | 4 |
| 1-1/4″ | 1.75″ | 5.25″ | 3.88″ | 0.19″ | .250″ | 2.50″ | 1.37″ | 0.81″ | 1.12″ | 0.75″ | 4 |
| 1-1/2″ | 1.99″ | 6.12″ | 4.50″ | 0.25″ | .250″ | 2.75″ | 1.50″ | 0.88″ | 1.25″ | 0.88″ | 4 |
| 2″ | 2.50″ | 6.50″ | 5.00″ | 0.31″ | .250″ | 3.31″ | 1.69″ | 1.00″ | 1.44″ | 0.75″ | 8 |
| 2-1/2″ | 3.00″ | 7.50″ | 5.88″ | 0.31″ | .250″ | 3.94″ | 1.87″ | 1.12″ | 1.62″ | 0.88″ | 8 |
| 3″ | 3.63″ | 8.25″ | 6.62″ | 0.38″ | .250″ | 4.62″ | 2.06″ | 1.25″ | 1.81″ | 0.88″ | 8 |
| 3-1/2″ | 4.13″ | 9.00″ | 7.25″ | 0.38″ | .250″ | 5.25″ | 2.19″ | 1.38″ | 1.94″ | 1.00″ | 8 |
| 4″ | 4.63″ | 10.00″ | 7.88″ | 0.44″ | .250″ | 5.75″ | 2.25″ | 1.38″ | 2.00″ | 1.00″ | 8 |
| 5″ | 5.69″ | 11.00″ | 9.25″ | 0.44″ | .250″ | 7.00″ | 2.37″ | 1.50″ | 2.12″ | 1.00″ | 8 |
| 6″ | 6.75″ | 12.50″ | 10.62″ | 0.50″ | .250″ | 8.12″ | 2.50″ | 1.62″ | 2.25″ | 1.00″ | 12 |
| 8″ | 8.75″ | 15.00″ | 13.00″ | 0.50″ | .250″ | 10.25″ | 2.94″ | 1.88″ | 2.69″ | 1.12″ | 12 |
| 10″ | 10.88″ | 17.50″ | 15.25″ | 0.50″ | .250″ | 12.62″ | 3.13″ | 2.12″ | 2.88″ | 1.25″ | 16 |
| 12″ | 12.94″ | 20.50″ | 17.75″ | 0.50″ | .250″ | 14.75″ | 3.37″ | 2.25″ | 3.12″ | 1.38″ | 16 |
| 14″ | 14.19″ | 23.00″ | 20.25″ | 0.50″ | .250″ | 16.75″ | 3.56″ | 2.38″ | 3.31″ | 1.38″ | 20 |
| 16″ | 16.19″ | 25.50″ | 22.50″ | 0.50″ | .250″ | 19.00″ | 3.94″ | 2.50″ | 3.69″ | 1.50″ | 20 |
| 18″ | 18.19″ | 28.00″ | 24.75″ | 0.50″ | .250″ | 21.00″ | 4.13″ | 2.62″ | 3.88″ | 1.50″ | 24 |
| 20″ | 20.19″ | 30.50″ | 27.00″ | 0.50″ | .250″ | 23.12″ | 4.25″ | 2.75″ | 4.00″ | 1.62″ | 24 |
| 22″ | 22.19″ | 33.00″ | 29.25″ | 0.50″ | .250″ | 25.25″ | 4.50″ | 2.88″ | 4.25″ | 1.75″ | 24 |
| 24″ | 24.19″ | 36.00″ | 32.00″ | 0.50″ | .250″ | 27.62″ | 4.75″ | 3.00″ | 4.50″ | 1.88″ | 24 |
THREADED CLASS 600
Threaded flange dimensions class 600 in inches (ASME B16.5)
| FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 0.93″ | 3.75″ | 2.62″ | 1.38″ | .250″ | 1.50″ | 1.13″ | 0.56″ | 0.88″ | 0.62″ | 4 |
| 3/4″ | 1.14″ | 4.62″ | 3.25″ | 1.69″ | .250″ | 1.88″ | 1.25″ | 0.62″ | 1.00″ | 0.75″ | 4 |
| 1″ | 1.41″ | 4.88″ | 3.50″ | 2.00″ | .250″ | 2.12″ | 1.31″ | 0.69″ | 1.06″ | 0.75″ | 4 |
| 1-1/4″ | 1.75″ | 5.25″ | 3.88″ | 2.50″ | .250″ | 2.50″ | 1.37″ | 0.81″ | 1.12″ | 0.75″ | 4 |
| 1-1/2″ | 1.99″ | 6.12″ | 4.50″ | 2.88″ | .250″ | 2.75″ | 1.50″ | 0.88″ | 1.25″ | 0.88″ | 4 |
| 2″ | 2.50″ | 6.50″ | 5.00″ | 3.62″ | .250″ | 3.31″ | 1.69″ | 1.00″ | 1.44″ | 0.75″ | 8 |
| 2-1/2″ | 3.00″ | 7.50″ | 5.88″ | 4.12″ | .250″ | 3.94″ | 1.87″ | 1.12″ | 1.62″ | 0.88″ | 8 |
THREADED CLASS 900
Threaded flange dimensions class 900 in inches (ASME B16.5)
| FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 0.93″ | 4.75″ | 3.25″ | 1.38″ | .250″ | 1.50″ | 1.50″ | 0.88″ | 1.25″ | 0.88″ | 4 |
| 3/4″ | 1.14″ | 5.13″ | 3.50″ | 1.69″ | .250″ | 1.75″ | 1.63″ | 1.00″ | 1.38″ | 0.88″ | 4 |
| 1″ | 1.41″ | 5.88″ | 4.00″ | 2.00″ | .250″ | 2.06″ | 1.88″ | 1.13″ | 1.63″ | 1.00″ | 4 |
| 1-1/4″ | 1.75″ | 6.25″ | 4.38″ | 2.50″ | .250″ | 2.50″ | 1.88″ | 1.13″ | 1.63″ | 1.00″ | 4 |
| 1-1/2″ | 1.99″ | 7.00″ | 4.88″ | 2.88″ | .250″ | 2.75″ | 2.00″ | 1.25″ | 1.75″ | 1.13″ | 4 |
| 2″ | 2.50″ | 8.50″ | 6.50″ | 3.63″ | .250″ | 4.13″ | 2.50″ | 1.50″ | 2.25″ | 1.00″ | 8 |
| 2-1/2″ | 3.00″ | 9.63″ | 7.50″ | 4.13″ | .250″ | 4.88″ | 2.75″ | 1.63″ | 2.50″ | 1.13″ | 8 |
| 3″ | 3.63″ | 9.50″ | 7.50″ | 5.00″ | .250″ | 5.00″ | 2.38″ | 1.50″ | 2.13″ | 1.00″ | 8 |
| 4″ | 4.63″ | 11.50″ | 9.25″ | 6.19″ | .250″ | 6.25″ | 3.00″ | 1.75″ | 2.75″ | 1.25″ | 8 |
| 5″ | 5.69″ | 13.75″ | 11.00″ | 7.31″ | .250″ | 7.50″ | 3.38″ | 3.00″ | 3.13″ | 1.38″ | 8 |
| 6″ | 6.75″ | 15.00″ | 12.50″ | 8.50″ | .250″ | 9.25″ | 3.63″ | 2.19″ | 3.38″ | 1.25″ | 12 |
| 8″ | 8.75″ | 18.50″ | 15.50″ | 10.63″ | .250″ | 11.75″ | 4.25″ | 2.50″ | 4.00″ | 1.50″ | 12 |
| 10″ | 10.88″ | 21.50″ | 18.50″ | 12.75″ | .250″ | 14.50″ | 4.50″ | 2.75″ | 4.25″ | 1.50″ | 16 |
| 12″ | 12.94″ | 24.00″ | 21.00″ | 15.00″ | .250″ | 16.50″ | 4.88″ | 3.13″ | 4.63″ | 1.50″ | 20 |
| 14″ | 14.19″ | 25.25″ | 22.00″ | 16.25″ | .250″ | 17.75″ | 5.38″ | 3.38″ | 5.13″ | 1.63″ | 20 |
| 16″ | 16.19″ | 27.75″ | 24.25″ | 18.50″ | .250″ | 20.00″ | 5.50″ | 3.50″ | 5.25″ | 1.75″ | 20 |
| 18″ | 18.19″ | 31.00″ | 27.00″ | 21.00″ | .250″ | 22.25″ | 6.25″ | 4.00″ | 6.00″ | 2.00″ | 20 |
| 20″ | 20.19″ | 33.75″ | 29.50″ | 23.00″ | .250″ | 24.50″ | 6.50″ | 4.25″ | 6.25″ | 2.13″ | 20 |
| 24″ | 24.19″ | 41.00″ | 35.50″ | 27.25″ | .250″ | 29.50″ | 8.25″ | 5.50″ | 8.00″ | 2.63″ | 20 |
THREADED CLASS 1500
Threaded flange dimensions class 1500 in inches (ASME B16.5)
| FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 0.93″ | 4.75″ | 3.25″ | 1.38″ | .250″ | 1.50″ | 1.50″ | 0.88″ | 1.25″ | 0.88″ | 4 |
| 3/4″ | 1.14″ | 5.13″ | 3.50″ | 1.69″ | .250″ | 1.75″ | 1.63″ | 1.00″ | 1.38″ | 0.88″ | 4 |
| 1″ | 1.41″ | 5.88″ | 4.00″ | 2.00″ | .250″ | 2.06″ | 1.88″ | 1.13″ | 1.63″ | 1.00″ | 4 |
| 1-1/4″ | 1.75″ | 6.25″ | 4.38″ | 2.50″ | .250″ | 2.50″ | 1.88″ | 1.13″ | 1.63″ | 1.00″ | 4 |
| 1-1/2″ | 1.99″ | 7.00″ | 4.88″ | 2.88″ | .250″ | 2.75″ | 2.00″ | 1.25″ | 1.75″ | 1.13″ | 4 |
| 2″ | 2.50″ | 8.50″ | 6.50″ | 3.63″ | .250″ | 4.13″ | 2.50″ | 1.50″ | 2.25″ | 1.00″ | 8 |
| 2-1/2″ | 3.00″ | 9.63″ | 7.50″ | 4.13″ | .250″ | 4.88″ | 2.75″ | 1.63″ | 2.50″ | 1.13″ | 8 |
THREADED CLASS 2500
Threaded flange dimensions class 2500 in inches (ASME B16.5)
| FLANGE NPS | Inside Diameter | Outside Diameter | Bolt Circle (BC) | Raised Face (R) | Raised Face (RF) | H | Raised Face Thickness (T) | T1 | Flat Face Thickness (T2) | Bolt Hole (B) | No. of Bolt Holes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 0.93″ | 5.25″ | 3.50″ | 1.38″ | .250″ | 1.69″ | 1.81″ | 1.19″ | 1.56″ | 0.88″ | 4 |
| 3/4″ | 1.14″ | 5.50″ | 3.75″ | 1.69″ | .250″ | 2.00″ | 1.94″ | 1.25″ | 1.69″ | 0.88″ | 4 |
| 1″ | 1.41″ | 6.25″ | 4.25″ | 2.00″ | .250″ | 2.25″ | 2.13″ | 1.38″ | 1.88″ | 1.00″ | 4 |
| 1-1/4″ | 1.75″ | 7.25″ | 5.13″ | 2.50″ | .250″ | 2.88″ | 2.31″ | 1.50″ | 2.06″ | 1.13″ | 4 |
| 1-1/2″ | 1.99″ | 8.00″ | 5.75″ | 2.88″ | .250″ | 3.13″ | 2.63″ | 1.75″ | 2.38″ | 1.25″ | 4 |
| 2″ | 2.50″ | 9.25″ | 6.75″ | 3.63″ | .250″ | 3.75″ | 3.00″ | 2.00″ | 2.75″ | 1.13″ | 8 |
| 2-1/2″ | 3.00″ | 10.50″ | 7.75″ | 4.13″ | .250″ | 4.50″ | 3.38″ | 2.25″ | 3.13″ | 1.25″ | 8 |
THREADED FLANGE DIMENSIONS IN MILLIMETERS
THREADED CLASS 150
Threaded flange dimensions class 150 in millimeters (ASME B16.5)
| Size inch | D mm | X mm | G mm | t mm | T2 mm | Q mm |
|---|---|---|---|---|---|---|
| 1/2 | 89 | 30.2 | 35.1 | 11.2 | 15.7 | 15.7 |
| 3/4 | 99 | 38.1 | 42.9 | 12.7 | 15.7 | 15.7 |
| 1 | 108 | 49.3 | 50.8 | 14.2 | 17.5 | 17.5 |
| 1¼ | 117 | 58.7 | 63.5 | 15.7 | 20.6 | 20.6 |
| 1½ | 127 | 65.0 | 73.2 | 17.5 | 22.4 | 22.4 |
| 2 | 152 | 77.7 | 91.9 | 19.1 | 25.4 | 25.4 |
| 2½ | 178 | 90.4 | 104.6 | 22.4 | 28.4 | 28.4 |
| 3 | 191 | 108.0 | 127.0 | 23.9 | 30.2 | 30.2 |
| 3½ | 216 | 122.2 | 139.7 | 23.9 | 31.8 | 31.8 |
| 4 | 229 | 134.9 | 157.2 | 23.9 | 33.3 | 33.3 |
| 5 | 254 | 163.6 | 185.7 | 23.9 | 36.6 | 36.6 |
| 6 | 279 | 192.0 | 215.9 | 25.4 | 39.6 | 39.6 |
| 8 | 343 | 246.1 | 269.7 | 28.4 | 44.5 | 44.5 |
| 10 | 406 | 304.8 | 323.9 | 30.2 | 49.3 | 49.3 |
| 12 | 483 | 365.3 | 381.0 | 31.8 | 55.6 | 55.6 |
| 14 | 533 | 400.1 | 412.8 | 35.1 | 57.2 | 57.2 |
| 16 | 597 | 457.2 | 469.9 | 36.6 | 63.5 | 63.5 |
| 18 | 635 | 505.0 | 533.4 | 39.6 | 68.3 | 68.3 |
| 20 | 699 | 558.8 | 584.2 | 42.9 | 73.2 | 73.2 |
| 24 | 813 | 663.4 | 692.2 | 47.8 | 82.6 | 82.6 |
| Size | Bolts Drilling | Bolting Requirements | |||||
|---|---|---|---|---|---|---|---|
| inch | Bolt circle Diameter mm | Holes # | Holes Dia. mm | Bolt Dia. inch. | Length FF Flange | Length RF Flange | Length RTJ Flange |
| 1/2 | 60.5 | 4 | 15.7 | 1/2 | 50.8 | 57.2 | – |
| 3/4 | 69.9 | 4 | 15.7 | 1/2 | 50.8 | 63.5 | – |
| 1 | 79.2 | 4 | 15.7 | 1/2 | 57.2 | 63.5 | 76.2 |
| 1¼ | 88.9 | 4 | 15.7 | 1/2 | 57.2 | 69.9 | 82.6 |
| 1½ | 98.6 | 4 | 15.7 | 1/2 | 63.5 | 69.9 | 82.6 |
| 2 | 120.7 | 4 | 19.1 | 5/8 | 69.9 | 82.6 | 95.3 |
| 2½ | 139.7 | 4 | 19.1 | 5/8 | 76.2 | 88.9 | 101.6 |
| 3 | 152.4 | 4 | 19.1 | 5/8 | 76.2 | 88.9 | 101.6 |
| 3½ | 177.8 | 8 | 19.1 | 5/8 | 76.2 | 88.9 | 101.6 |
| 4 | 190.5 | 8 | 19.1 | 5/8 | 76.2 | 88.9 | 101.6 |
| 5 | 215.9 | 8 | 22.4 | 3/4 | 82.6 | 95.3 | 108.0 |
| 6 | 241.3 | 8 | 22.4 | 3/4 | 82.6 | 101.6 | 114.3 |
| 8 | 298.5 | 8 | 22.4 | 3/4 | 88.9 | 108.0 | 120.7 |
| 10 | 362.0 | 12 | 25.4 | 7/8 | 101.6 | 114.3 | 127.0 |
| 12 | 431.8 | 12 | 25.4 | 7/8 | 101.6 | 120.7 | 133.4 |
| 14 | 476.3 | 12 | 28.4 | 1 | 114.3 | 133.4 | 146.1 |
| 16 | 539.8 | 16 | 28.4 | 1 | 114.3 | 133.4 | 146.1 |
| 18 | 577.9 | 16 | 31.8 | 11/8 | 127.0 | 146.1 | 158.8 |
| 20 | 635.0 | 20 | 31.8 | 11/8 | 139.7 | 158.8 | 171.5 |
| 24 | 749.3 | 20 | 35.1 | 1¼ | 152.4 | 171.5 | 184.2 |
THREADED CLASS 300
Threaded flange dimensions class 300 in millimeters (ASME B16.5)
| Size inch | D mm | X mm | G mm | t mm | B mm | T2 mm | Q mm |
|---|---|---|---|---|---|---|---|
| 1/2 | 95 | 38.1 | 35.1 | 14.2 | 23.6 | 22.4 | 15.7 |
| 3/4 | 117 | 47.8 | 42.9 | 15.7 | 29.0 | 25.4 | 15.7 |
| 1 | 124 | 53.8 | 50.8 | 17.5 | 35.8 | 26.9 | 17.5 |
| 1¼ | 133 | 63.5 | 63.5 | 19.1 | 44.5 | 26.9 | 20.6 |
| 1½ | 155 | 69.9 | 73.2 | 20.6 | 50.5 | 30.2 | 22.4 |
| 2 | 165 | 84.1 | 91.9 | 22.4 | 63.5 | 33.3 | 28.4 |
| 2½ | 191 | 100.1 | 104.6 | 25.4 | 76.2 | 38.1 | 31.8 |
| 3 | 210 | 117.3 | 127.0 | 28.4 | 92.2 | 42.9 | 31.8 |
| 3½ | 229 | 133.4 | 139.7 | 30.2 | 104.9 | 44.5 | 36.6 |
| 4 | 254 | 146.1 | 157.2 | 31.8 | 117.6 | 47.8 | 36.6 |
| 5 | 279 | 177.8 | 185.7 | 35.1 | 144.5 | 50.8 | 42.9 |
| 6 | 318 | 206.2 | 215.9 | 36.6 | 171.5 | 52.3 | 46.0 |
| 8 | 381 | 260.4 | 269.7 | 41.1 | 222.3 | 62.0 | 50.8 |
| 10 | 445 | 320.5 | 323.9 | 47.8 | 276.4 | 66.5 | 55.6 |
| 12 | 521 | 374.7 | 381.0 | 50.8 | 328.7 | 73.2 | 60.5 |
| 14 | 584 | 425.5 | 412.8 | 63.8 | 360.4 | 76.2 | 63.5 |
| 16 | 648 | 482.6 | 469.9 | 57.2 | 411.2 | 82.6 | 68.3 |
| 18 | 711 | 533.4 | 533.4 | 60.5 | 462.0 | 88.9 | 69.9 |
| 20 | 775 | 587.2 | 584.2 | 63.5 | 512.8 | 95.3 | 73.2 |
| 24 | 914 | 701.5 | 692.2 | 69.9 | 614.4 | 106.4 | 82.6 |
| Size | Bolts Drilling | Bolting Requirements | |||||
|---|---|---|---|---|---|---|---|
| inch | Bolt circle Diameter mm | Holes # | Holes Dia. mm | Bolt Dia. inch. | Length FF Flange | Length RF Flange | Length RTJ Flange |
| 1/2 | 66.5 | 4 | 15.7 | 1/2 | 57.2 | 63.5 | 76.2 |
| 3/4 | 82.6 | 4 | 19.1 | 5/8 | 63.5 | 76.2 | 88.9 |
| 1 | 88.9 | 4 | 19.1 | 5/8 | 63.5 | 76.2 | 88.9 |
| 1¼ | 98.6 | 4 | 19.1 | 5/8 | 69.9 | 82.6 | 95.3 |
| 1½ | 114.3 | 4 | 22.4 | 3/4 | 76.2 | 88.9 | 101.6 |
| 2 | 127.0 | 8 | 19.1 | 5/8 | 76.2 | 88.9 | 101.6 |
| 2½ | 149.4 | 8 | 22.4 | 3/4 | 82.6 | 101.6 | 114.3 |
| 3 | 168.1 | 8 | 22.4 | 3/4 | 88.9 | 108.0 | 120.7 |
| 3½ | 184.2 | 8 | 22.4 | 3/4 | 95.3 | 108.0 | 127.0 |
| 4 | 200.2 | 8 | 22.4 | 3/4 | 95.3 | 114.3 | 127.0 |
| 5 | 235.0 | 8 | 22.4 | 3/4 | 108.0 | 120.7 | 133.4 |
| 6 | 269.7 | 12 | 22.4 | 3/4 | 108.0 | 120.7 | 139.7 |
| 8 | 330.2 | 12 | 25.4 | 7/8 | 120.7 | 139.7 | 152.4 |
| 10 | 387.4 | 16 | 28.4 | 1 | 139.7 | 158.8 | 171.5 |
| 12 | 450.9 | 16 | 31.8 | 11/8 | 146.1 | 171.5 | 184.2 |
| 14 | 514.4 | 20 | 31.8 | 11/8 | 158.8 | 177.8 | 190.5 |
| 16 | 571.5 | 20 | 35.1 | 1¼ | 165.1 | 190.5 | 203.2 |
| 18 | 628.7 | 24 | 35.1 | 1¼ | 171.5 | 196.9 | 209.6 |
| 20 | 685.8 | 24 | 35.1 | 1¼ | 184.2 | 203.2 | 222.3 |
| 24 | 812.8 | 24 | 41.1 | 1½ | 203.2 | 228.6 | 254.0 |
THREADED CLASS 600
Threaded flange dimensions class 600 in millimeters (ASME B16.5)
| Size inch | D mm | X mm | G mm | t mm | B2 mm | T2 mm | Q mm |
|---|---|---|---|---|---|---|---|
| 1/2 | 95 | 38.1 | 35.1 | 14.2 | 22.4 | 22.4 | 15.7 |
| 3/4 | 117 | 47.8 | 42.9 | 15.7 | 27.7 | 25.4 | 15.7 |
| 1 | 124 | 53.8 | 50.8 | 17.5 | 34.5 | 26.9 | 17.5 |
| 1¼ | 133 | 63.5 | 63.5 | 20.6 | 43.2 | 28.4 | 20.6 |
| 1½ | 155 | 69.9 | 73.2 | 22.4 | 49.5 | 31.8 | 22.4 |
| 2 | 165 | 84.1 | 91.9 | 25.4 | 62.0 | 36.6 | 28.4 |
| 2½ | 191 | 100.1 | 104.6 | 28.4 | 74.7 | 41.1 | 31.8 |
| 3 | 210 | 117.3 | 127.0 | 31.8 | 90.7 | 46.0 | 35.1 |
| 3½ | 229 | 133.4 | 139.7 | 35.1 | 103.4 | 49.3 | 39.6 |
| 4 | 273 | 152.4 | 157.2 | 38.1 | 116.1 | 53.8 | 41.1 |
| 5 | 330 | 189.0 | 185.7 | 44.5 | 143.8 | 60.5 | 47.8 |
| 6 | 356 | 222.3 | 215.9 | 47.8 | 170.7 | 66.5 | 50.8 |
| 8 | 419 | 273.1 | 269.7 | 55.6 | 221.5 | 76.2 | 57.2 |
| 10 | 508 | 342.9 | 323.9 | 63.5 | 276.4 | 85.9 | 65.0 |
| 12 | 559 | 400.1 | 381.0 | 66.5 | 327.2 | 91.9 | 69.9 |
| 14 | 603 | 431.8 | 412.8 | 69.9 | 359.2 | 93.7 | 73.2 |
| 16 | 686 | 495.3 | 469.9 | 76.2 | 410.5 | 106.4 | 77.7 |
| 18 | 743 | 546.1 | 533.4 | 82.6 | 461.8 | 117.3 | 79.2 |
| 20 | 813 | 609.6 | 584.2 | 88.9 | 513.1 | 127.0 | 82.6 |
| 24 | 940 | 717.6 | 692.2 | 101.6 | 616.0 | 139.7 | 91.9 |
| Size | Bolts Drilling | Bolting Requirements | |||||
|---|---|---|---|---|---|---|---|
| inch | Bolt circle Diameter mm | Holes # | Holes Dia. mm | Bolt Dia. inch. | Length FF Flange | Length RF Flange | Length RTJ Flange |
| 1/2 | 66.5 | 4 | 15.7 | 1/2 | 76.2 | 69.9 | 76.2 |
| 3/4 | 82.6 | 4 | 19.1 | 5/8 | 88.9 | 82.6 | 88.9 |
| 1 | 88.9 | 4 | 19.1 | 5/8 | 88.9 | 82.6 | 88.9 |
| 1¼ | 98.6 | 4 | 19.1 | 5/8 | 95.3 | 88.9 | 95.3 |
| 1½ | 114.3 | 4 | 22.4 | 3/4 | 108.0 | 101.6 | 108.0 |
| 2 | 127.0 | 8 | 19.1 | 5/8 | 108.0 | 101.6 | 108.0 |
| 2½ | 149.4 | 8 | 22.4 | 3/4 | 120.7 | 114.3 | 120.7 |
| 3 | 168.1 | 8 | 22.4 | 3/4 | 127.0 | 120.7 | 127.0 |
| 3½ | 184.2 | 8 | 25.4 | 7/8 | 139.7 | 133.4 | 139.7 |
| 4 | 215.9 | 8 | 25.4 | 7/8 | 146.1 | 139.7 | 146.1 |
| 5 | 266.7 | 8 | 28.4 | 1 | 165.1 | 158.8 | 165.1 |
| 6 | 292.1 | 12 | 28.4 | 1 | 171.5 | 165.1 | 171.5 |
| 8 | 349.3 | 12 | 31.8 | 11/8 | 190.5 | 184.2 | 196.9 |
| 10 | 431.8 | 16 | 35.1 | 1¼ | 215.9 | 209.6 | 215.9 |
| 12 | 489.0 | 20 | 35.1 | 1¼ | 222.3 | 215.9 | 222.3 |
| 14 | 527.1 | 20 | 38.1 | 13/8 | 235.0 | 228.6 | 235.0 |
| 16 | 603.3 | 20 | 41.1 | 1½ | 254.0 | 247.7 | 254.0 |
| 18 | 654.1 | 20 | 44.5 | 15/8 | 273.1 | 266.7 | 273.1 |
| 20 | 723.9 | 24 | 44.5 | 15/8 | 285.8 | 279.4 | 292.1 |
| 24 | 838.2 | 24 | 50.8 | 17/8 | 330.2 | 323.9 | 336.6 |
THREADED CLASS 900
Threaded flange dimensions class 900 in millimeters (ASME B16.5)
| Size inch | D mm | X mm | G mm | t mm | B mm | T2 mm | Q mm |
|---|---|---|---|---|---|---|---|
| 1/2 | 121 | 38.1 | 35.1 | 22.4 | 23.6 | 31.8 | 22.4 |
| 3/4 | 130 | 44.5 | 42.9 | 25.4 | 29.0 | 35.1 | 25.4 |
| 1 | 149 | 52.3 | 50.8 | 28.4 | 35.8 | 41.1 | 28.4 |
| 1¼ | 159 | 63.5 | 63.5 | 28.4 | 44.5 | 41.1 | 30.2 |
| 1½ | 178 | 69.9 | 73.2 | 31.8 | 50.5 | 44.5 | 31.8 |
| 2 | 216 | 104.6 | 91.9 | 38.1 | 63.5 | 57.2 | 38.1 |
| 2½ | 244 | 124.0 | 104.6 | 41.1 | 76.2 | 63.5 | 47.8 |
| 3 | 241 | 127.0 | 127.0 | 38.1 | 92.2 | 53.8 | 41.1 |
| 4 | 292 | 158.8 | 157.2 | 44.5 | 117.6 | 69.9 | 47.8 |
| 5 | 349 | 190.5 | 185.7 | 50.8 | 144.5 | 79.2 | 53.8 |
| 6 | 381 | 235.0 | 215.9 | 55.6 | 171.5 | 85.9 | 57.2 |
| 8 | 470 | 298.5 | 269.7 | 63.5 | 222.3 | 101.6 | 63.5 |
| 10 | 546 | 368.3 | 323.9 | 69.9 | 276.4 | 108.0 | 71.4 |
| 12 | 610 | 419.1 | 381.0 | 79.2 | 328.7 | 117.3 | 76.2 |
| 14 | 641 | 450.9 | 412.8 | 85.9 | 360.4 | 130.0 | 82.6 |
| 16 | 705 | 508.0 | 469.9 | 88.9 | 411.2 | 133.4 | 85.9 |
| 18 | 787 | 565.2 | 533.4 | 101.6 | 462.0 | 152.4 | 88.9 |
| 20 | 857 | 622.3 | 584.2 | 108.0 | 512.8 | 158.8 | 91.9 |
| 24 | 1041 | 749.3 | 692.2 | 139.7 | 614.4 | 203.2 | 101.6 |
| Size | Bolts Drilling | Bolting Requirements | |||||
|---|---|---|---|---|---|---|---|
| inch | Bolt circle Diameter mm | Holes # | Holes Dia. mm | Bolt Dia. inch. | Length FF Flange | Length RF Flange | Length RTJ Flange |
| 1/2 | 82.6 | 4 | 22.4 | 3/4 | 108.0 | 101.6 | 108.0 |
| 3/4 | 88.9 | 4 | 22.4 | 3/4 | 114.3 | 108.0 | 114.3 |
| 1 | 101.6 | 4 | 25.4 | 7/8 | 127.0 | 120.7 | 127.0 |
| 1¼ | 111.3 | 4 | 25.4 | 7/8 | 127.0 | 120.7 | 127.0 |
| 1½ | 124.0 | 4 | 28.4 | 1 | 139.7 | 133.4 | 139.7 |
| 2 | 165.1 | 8 | 25.4 | 7/8 | 146.1 | 139.7 | 146.1 |
| 2½ | 190.5 | 8 | 28.4 | 1 | 158.8 | 152.4 | 158.8 |
| 3 | 190.5 | 8 | 25.4 | 7/8 | 146.1 | 139.7 | 146.1 |
| 4 | 235.0 | 8 | 31.8 | 11/8 | 171.5 | 165.1 | 171.5 |
| 5 | 279.4 | 8 | 35.1 | 1¼ | 190.5 | 184.2 | 190.5 |
| 6 | 317.5 | 12 | 31.8 | 11/8 | 190.5 | 184.2 | 196.9 |
| 8 | 393.7 | 12 | 38.1 | 13/8 | 222.3 | 215.9 | 222.3 |
| 10 | 469.9 | 16 | 38.1 | 13/8 | 235.0 | 228.6 | 235.0 |
| 12 | 533.4 | 20 | 38.1 | 13/8 | 254.0 | 247.7 | 254.0 |
| 14 | 558.8 | 20 | 41.1 | 1½ | 273.1 | 266.7 | 292.1 |
| 16 | 616.0 | 20 | 44.5 | 15/8 | 285.8 | 279.4 | 298.5 |
| 18 | 685.8 | 20 | 50.8 | 17/8 | 323.9 | 317.5 | 333.6 |
| 20 | 749.3 | 20 | 53.8 | 2 | 349.3 | 342.9 | 362.0 |
| 24 | 901.7 | 20 | 66.5 | 1½ | 438.2 | 431.8 | 457.2 |