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What is the connection method of Titanium Alloy Gr 2 Flanges?
2024-08-30
A Titanium Grade 2 flange joint normally combines a selected flange type, compatible gasket, specified bolting and a controlled assembly procedure. “Bolting the flanges together” describes only the visible action; leak integrity depends on flange design, facing, alignment, gasket stress, bolt load, temperature, pressure and service fluid.
Connection Method by Flange Type
| Decision | Selection control |
|---|---|
| Weld neck | Butt-welded to compatible pipe using a qualified titanium welding procedure; flange faces are then bolted to the mating flange |
| Slip-on | Pipe is inserted and welded as required by the design; suitability and fatigue performance differ from weld neck construction |
| Lap joint / stub end | A titanium stub end provides process contact while the backing flange supplies bolt load; materials and galvanic exposure require review |
| Blind | Closes the line and relies on bolting and gasket selection appropriate to the service |
| Threaded or socket-weld | Use only when covered by the project design, size range, material specification and applicable standard |
Assembly Controls
- Confirm flange standard, type, nominal size, class, facing and bore.
- Select gasket construction for flange facing, process chemistry, temperature and required seating stress.
- Specify bolting material, dimensions, lubrication condition and tightening procedure.
- Check parallelism, alignment and cleanliness before tightening.
- Use an approved bolt-loading sequence and target; do not copy a universal torque value from another joint.
- Perform the required leak or pressure test and record the result.
FAQ
Can every Grade 2 flange use the same gasket?
No. Gasket selection depends on facing, service, pressure-temperature conditions and required seating stress.
Does the flange material define bolt torque?
No. Torque-to-load behaviour depends on bolt size and material, lubricant, friction, gasket and joint design. Follow the engineered assembly procedure.
Continue to Grade 2 Flange Selection
Review Titanium Grade 2 Flanges, the Titanium Flange category and the Weld Neck vs Slip-On guide.