# California — ASME Code Section stamps and National Board stamps required for boilers and pressure vessels in each US state, Canadian province and US city, county or territory

For California, national board stamps required is None***; asme code section stamps required is All; footnotes is ***Except for refinery and oilfield locations require an R stamp; country is United States, recorded from its source on 2026-08-28.

- **Jurisdiction:** California _(our reading, not quoted from the source)_
- **National Board stamps required:** None*** _(verified: appears in the quote below)_
- **ASME Code Section stamps required:** All _(verified: appears in the quote below)_
- **Footnotes:** ***Except for refinery and oilfield locations require an R stamp. _(our reading, not quoted from the source)_
- **Country:** United States _(our reading, not quoted from the source)_

## What the source says

> California       None***                 All

## Source

- https://www.nationalboard.org/SiteDocuments/Synopsis/asme_requirements.pdf

Last verified: 2026-08-28. Review by: 2027-08-28.
Part of [ASME Code Section stamps and National Board stamps required for boilers and pressure vessels in each US state, Canadian province and US city, county or territory](https://referencesource.org/boiler-pressure-vessel-stamp-requirements-by-jurisdiction/).