Chapter 35 — WELDING AND OTHER HOT WORK
3510 Hot Work on Flammable and Combustible Liquid Storage Tanks — 2025 California Fire Code
California Fire Code (Title 24, Part 9) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Fire Code (Title 24, Part 9) § 3510 · Effective January 1, 2026 · Official source: Building Standards Commission
3510.1 General.¶
Hot work performed on the interior or exterior of tanks that hold or have held flammable or combustible liquids shall be in accordance with Section 3510.2 and Chapters 4, 5, 6, 7 and 10 of NFPA 326.
3510.2 Prevention.¶
The following steps shall be taken to minimize hazards where hot work must be performed on a flammable or combustible liquid storage container:
Use alternative methods to avoid hot work where possible.
Analyze the hazards prior to performing hot work, identify the potential hazards and the methods of hazard control.
Hot work shall conform to the requirements of the code or standard to which the container was originally fabricated.
Test the immediate and surrounding work area with a combustible gas detector and provide for a means of continuing monitoring while conducting the hot work.
Qualified employees and contractors performing hot work shall use an industry-approved hot work permit system to control the work.
Personnel shall be properly trained on hot work policies and procedures regarding equipment, safety, hazard controls and job-specific requirements.
On-site safety supervision shall be present where hot work is in progress to protect the personnel conducting the hot work and provide additional overview of site-specific hazards.
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CALIFORNIA FIRE CODE – MATRIX ADOPTION TABLE
CHAPTER 36 – MARINAS
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
| Adopting Agency | BSC | BSC- CG |
SFM | HCD | DSA | OSHPD | BSCC | DPH | AGR | DWR | CEC | CA | SL | SLC | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adopting Agency | BSC | BSC- CG |
T-24 | T-19* | 1 | 2 | 1/AC | AC | SS | 1 | 1R | 2 | 3 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Adopt Entire Chapter | X | ||||||||||||||||||||||
| Adopt Entire Chapter as amended (amended sections listed below) |
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| Adopt only those sections that are listed below |
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| [California Code of Regulations, Title 19, Division 1] |
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| Chapter / Section |
- The California Code of Regulations (CCR), Title 19, Division 1 provisions that are found in the California Fire Code are a reprint from the current CCR, Title 19, Division 1 text for the code user’s convenience only. The scope, applicability and appeals procedures of CCR, Title 19, Division I remain the same. The state agency does not adopt sections identified by the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
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