**Recommended Minimum Frame Sizes for Vessels in Heating Mantles**
| Vessel Volume (L) | Tube Size NB (mm) | Min Frame Depth × Width (mm × mm) | |——————–|——————–|—————————————| | 20 | 25 | 400 × 600 | | 50 | 25 | 600 × 800 | | 100 | 25, 30 | 800 × 800 | | 200 | 30 | 800 × 1000 |
**Design Considerations**
– Ensure enough room for the mantle’s heating element and insulation
– Maintain clearance around the vessel for thermal expansion, instrumentation, and maintenance
– Frame must impose no undesirable lateral or bending loads on vessel supports
– Use matching tube NB as recommended or higher for added stiffness
– Integrate with base frames, guide supports, and bracing to maintain overall system rigidity