State OD and wall clearly
Use a format such as tube OD × wall thickness and include the material grade. Do not substitute nominal connection size for actual tube dimensions.
- Tube outside diameter
- Wall thickness
- Material grade
- Dimensional standard if controlled
Connect tube size to the geometry
Provide the required coil diameter, straight legs, pitch, number of turns and bend radii. The fabricator can then review whether the requested route is compatible with the defined tube.
- Coil or bend diameter
- Pitch and turn count
- Straight-leg length
- Overall envelope and tolerances
Add the operating basis
Pressure, temperature, medium and duty are part of the engineering review. Final wall and material selection should follow the approved project design and applicable requirements.
- Internal and external media
- Operating and design pressure
- Temperature range
- Required inspection or test
Use catalog examples correctly
The Uniinox custom coil catalog contains 304 stainless reference configurations at Ø9.52, Ø12 and Ø22 mm. These examples show documented geometries, not universal design recommendations.
- Ø9.52 × 0.7 reference
- Ø12 × 0.8 reference
- Ø22 × 1.0 references
- Approved drawing controls production
Frequently asked questions
Project questions
Is tube OD the same as connection size?
Not necessarily. State both the actual tube dimensions and the required connection details.
Can I choose wall thickness from the website alone?
No. The final selection depends on material, pressure, temperature, medium, forming geometry and the approved design basis.