DIRECT ANSWERThe project drawings must define the difference. A double-wall enquiry also identifies each wall's function, pressure, temperature and material; interspace duty; leak collection/monitoring; supports; assembly and inspection.
Double-wall definition
- Inner and outer boundary functions
- Pressure, temperature and material for each boundary
- Interspace, leak detection/collection and venting
- Supports, assembly, testing and document separation
Relevant manufacturing capability
- Project-specific storage-vessel manufacturability review
- Material, welding, inspection and pressure-test control
- Batch fabrication, documentation and large-equipment delivery coordination
Key notes
- Double wall does not automatically mean a vacuum-insulated cryogenic tank.