EN 13445-3 / EN 1092-1
Blind Flange Calculator
Automatic PN selection and thickness sizing with a quick weight estimate.
Parameters
EN 13445-3 sizing inputs
Geometry mode
Diameter (DN)
Operating pressure (bar)
Test pressure (bar)Auto until edited
Auto (EN/ASME): 17.9 bar · EN 13445-5: max(1.25·P·ratio, 1.43·P) · ratio 1.43
Temperature (deg C)
Material
Corrosion allowance (mm)
Gasket (EN 1514-1)
Facing
Gasket material
Gasket thickness (mm)
Bolting
Fastener standard
Fastener type
Grade / Material
Proof/Yield: 580 / 640 MPa
Tightening condition
Method
PN selection
Operating pressure 10 bar maps to PN 10. Selected class:PN 16.
Results view
Recommended thickness
8 mm
Calculated: 6.12 mm
Flange weight
2.4 kg
Based on flange OD and thickness
Bolts (PN 16)
8 qty
Thread M16
Gasket mean dia
108 mm
G_eff (EN 1514-1)
Allowable stress
176.7 MPa
Operating
Allowable stress
252.4 MPa
Test
SketchPN 16
Outer D: 220 mm
Bolt circle: 180 mm
Rec. thickness: 8 mm
Calculation details (EN 13445-3)
| Parameter | Value | Comment |
|---|---|---|
| Selected PN class | PN 16 | Nearest standard ≥ 10 bar |
| Min. thickness | 5.12 mm | Before corrosion allowance |
| Final thickness | 6.12 mm | Includes corrosion allowance |
| Bolt pattern | 8 x M16 | Bolt circle 180 mm |
| Fastener | EN / BOLT | 8.8 (carbon steel) |
| Bolt torque | 55–67 N·m | seating, util 21% |
Discussion
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