What the software calculates
TankCode 650 runs the API 650 design workflow as connected modules rather than isolated calculators. Because every module reads from the same tank geometry and design basis, changing one input — diameter, specific gravity, seismic site class, wind speed — flows through the whole job instead of forcing a manual re-check in five separate files.
Calculation modules
| Module | What it covers |
|---|---|
| Shell design | Course-by-course shell thickness with the 1-Foot and Variable-Design-Point methods and corrosion allowance handling. Shell thickness guide. |
| Seismic | Overturning, base shear, and freeboard using ASCE 7-10, ASCE 7-16, IS 1893 Part-2, or Site Spectra. Seismic design guide. |
| Wind stability | Overturning stability and intermediate wind girder sizing. Wind girder guide. |
| Anchorage | Anchor requirement checks and bolt sizing under wind and seismic uplift. Anchorage guide. |
| Roof & external pressure | Cone/dome roof design and external-pressure stability. Cone roof guide. |
| Reporting | One consolidated PDF engineering report across every module. PDF report guide. |
Why teams move off spreadsheets and desktop tools
- No install, no license server. The app runs in the browser, so onboarding a reviewer is a link, not an IT ticket.
- One source of geometry. Shell, seismic, wind, anchorage, and roof stay linked, so a single input change does not trigger five manual re-checks.
- Multi-edition support. API 650 11th, 13th, and 14th Editions without maintaining separate template files.
- Traceable output. Reviewers follow a structured PDF report instead of reverse-engineering a workbook.
Looking for an alternative to a desktop tank design tool? TankCode 650 covers the same core API 650 workflow while adding browser access, shared projects, and multi-edition logic. For a side-by-side view of the trade-offs, see the software vs spreadsheets comparison.
Who it is for
TankCode 650 fits structural and process engineers, EPC teams, and fabricators who design API 650 tanks regularly and need multidisciplinary checks plus formal documentation. If your work is repeatable and review matters, a connected online tool removes the most repetitive engineering admin. New to the app? Start with the getting-started walkthrough.