Calculate flange bolt load from internal pressure and bending moment (AS 2885.1 appendix T).
The flange is assumed to be unrestrained (worst case). The bolt tensile area can be calculated for either ANSI threads based on threads per inch, or ISO threads based on thread pitch.
The flange leakage load is the minimum load to prevent leackage. The gasket is assumed to be non self sealing. The pre load stress is equal to the leakage load multiplied by the safety factor. The design load is equal to the pre load plus the operating load (the operating load is assumed to be equal to the leakage load). The design stress is calculated from the design load and the bolt tensile area.
Tool Input
- syutype : Stress Schedule
- mattype : Bolt Material Type
- SMYSu : User Defined Specified Minimum Yield Stress
- bolttype : Bolt Schedule
- diabtype : Bolt Size
- Du : User Defined Bolt Diameter
- Pu : User Defined Pitch Length
- TPIu : User Defined Threads Per Inch
- areatype : Bolt Tensile Area Type
- Axu : User Defined Bolt Tensile Area
- satype : Design Stress Type
- Sau : User Defined Bolt Design Stress
- dfactype : Stress Design Factor Type
- Fdu : User Defined Stress Design Factor
- sfactype : Safety Factor Type
- SFu : User Defined Safety Factor
- loadtype : Bolt And Flange Load Type
- Nbu : User Defined Bolt Load
- Sbu : User Defined Bolt Stress
- Pfu : User Defined Flange Pressure
- G : Gasket Outside Diameter
- NN : Number Of Bolts
Tool Output
- AX : Bolt Tensile Area
- Ap : Gasket Internal Cross Section Area
- D : Bolt Diameter
- Fd : Stress Design Factor
- Nb : Bolt Load
- P : Bolt Thread Pitch
- Pf : Flange Pressure
- SF : Safety Factor
- SMYS : Yield Stress
- Sb : Bolt Stress
- Sb/Sd : Bolt Stress Over Design Stress Ratio
- Sd : Design Bolt Stress
- TPI : Bolt Threads Per Inch