California
For California, governing body is Department of Industrial Relations, Division of Industrial Safety and Health; statute citation is California Code of Regulations, Title 8. Chapter 4. Division of Industrial Safety, Subchapter 1. Unfired Pressure Vessel Safety , Sections 450 through 560; Subchapter 2. Boiler and Fired Pressure Vessel Safety , Sections 750 through 797; power boiler inspection interval is one annual internal and external inspection (Exception: boilers in turbo-electric plants furnishing steam to a single turbine inspected internally at least once each 18 months); Title 8, Section 770 allows fired boilers to go up to three years without internal inspection after application and acceptance by the Pressure Vessel Unit; pressure vessel inspection interval is one inspection at least every three years for portable air tanks and five years for all other air tanks; LPG tanks on schedule by usage type (3–5 years); accepted inspector types is Inspectors holding a valid Certificate of Competency issued by the division (accepted in lieu of Pressure Vessel Unit engineer); owner/user organization inspectors whose inservice programs have been approved by the Pressure Vessel Unit, recorded from its source on 2026-08-05.
- State
- California verified
- Governing body
- Department of Industrial Relations, Division of Industrial Safety and Health
- Statute citation
- California Code of Regulations, Title 8. Chapter 4. Division of Industrial Safety, Subchapter 1. Unfired Pressure Vessel Safety , Sections 450 through 560; Subchapter 2. Boiler and Fired Pressure Vessel Safety , Sections 750 through 797. verified
- Power boiler inspection interval
- one annual internal and external inspection (Exception: boilers in turbo-electric plants furnishing steam to a single turbine inspected internally at least once each 18 months); Title 8, Section 770 allows fired boilers to go up to three years without internal inspection after application and acceptance by the Pressure Vessel Unit
- Pressure vessel inspection interval
- one inspection at least every three years for portable air tanks and five years for all other air tanks; LPG tanks on schedule by usage type (3–5 years)
- Accepted inspector types
- Inspectors holding a valid Certificate of Competency issued by the division (accepted in lieu of Pressure Vessel Unit engineer); owner/user organization inspectors whose inservice programs have been approved by the Pressure Vessel Unit
- Exemptions
- Boilers and pressure vessels under federal inspection and control or exempted by the labor code; boilers on automobiles and road motor vehicles; boilers and unfired pressure vessels used in household service; air pressure tanks under US DOT, Public Utilities Commission, or Highway Patrol jurisdiction; unfired pressure vessels not subject to more than 15 psi; unfired pressure vessels with inside diameter not exceeding 6 inches; small power boilers with automatic controls not exceeding 100 sq ft heating surface, 16-inch inside diameter steam drums, 100 psi MAWP, 35-gallon water capacity, 400,000 BTU/hr input; LP gas cylinders per US DOT; air tanks of 1-1/2 cubic feet or less not exceeding 150 psi
What the source says
California Code of Regulations, Title 8. Chapter 4. Division of Industrial Safety, Subchapter 1. Unfired Pressure Vessel Safety , Sections 450 through 560; Subchapter 2. Boiler and Fired Pressure Vessel Safety , Sections 750 through 797. RULES FOR CONSTRUCTION AND STAMPING Construction:
— nationalboard.org, retrieved 2026-08-05
Source
- nationalboard.orghttps://www.nationalboard.org/PrintAllSynopsis.aspx?Jurisdiction=Select