1910.119(j): Mechanical Integrity of Process Equipment
Employers covered by process safety management must keep pressure vessels, tanks, piping, relief and vent systems, emergency shutdown systems, controls and pumps in sound condition. They must have written maintenance procedures, train maintenance workers on the process, its hazards and their procedures, and inspect and test equipment using good engineering practices at the required frequency, documenting each inspection's date, inspector, equipment identifier, description and results.
Key takeaways
- 1910.119(j) is part of OSHA's general industry standards (29 CFR Part 1910, Subpart H).
- OSHA cited it 227 times in the last 3 years, in 130 inspections, with $1,810,794 in current penalties.
- 1 death is linked to inspections that cited this rule.
- Most citations: TX (43), VA (17), OR (14).
- Related part: 1910.119(j)(4) Inspection and testing (96 citations).
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In this article
What this rule covers
29 CFR 1910.119(j) ("Mechanical integrity") is one requirement inside 1910.119 Process safety management of highly hazardous chemicals, an OSHA general industry standard (Part 1910, Subpart H). It includes 19 sub-paragraphs. The official text below is copied word for word from the Electronic Code of Federal Regulations (eCFR). The numbers, injury cases and training on this page show how OSHA enforces it on real job sites.
Official text
(j) Mechanical integrity — 227 citations
(1) Application. Paragraphs (j)(2) through (j)(6) of this section apply to the following process equipment: Open (j)(1) 3 citations
(i) Pressure vessels and storage tanks;
(ii) Piping systems (including piping components such as valves);
(iii) Relief and vent systems and devices; 1 citations
(iv) Emergency shutdown systems;
(v) Controls (including monitoring devices and sensors, alarms, and interlocks) and, 1 citations
(vi) Pumps.
(2) Written procedures. The employer shall establish and implement written procedures to maintain the on-going integrity of process equipment. Open (j)(2) 72 citations
(3) Training for process maintenance activities. The employer shall train each employee involved in maintaining the on-going integrity of process equipment in an overview of that process and its hazards and in the procedures applicable to the employee's job tasks to assure that the employee can perform the job tasks in a safe manner. Open (j)(3) 13 citations
(4) Inspection and testing. Open (j)(4) 96 citations
(i) Inspections and tests shall be performed on process equipment. Open (j)(4)(i) 29 citations
(ii) Inspection and testing procedures shall follow recognized and generally accepted good engineering practices. Open (j)(4)(ii) 17 citations
(iii) The frequency of inspections and tests of process equipment shall be consistent with applicable manufacturers' recommendations and good engineering practices, and more frequently if determined to be necessary by prior operating experience. Open (j)(4)(iii) 27 citations
(iv) The employer shall document each inspection and test that has been performed on process equipment. The documentation shall identify the date of the inspection or test, the name of the person who performed the inspection or test, the serial number or other identifier of the equipment on which the inspection or test was performed, a description of the inspection or test performed, and the results of the inspection or test. Open (j)(4)(iv) 20 citations
(5) Equipment deficiencies. The employer shall correct deficiencies in equipment that are outside acceptable limits (defined by the process safety information in paragraph (d) of this section) before further use or in a safe and timely manner when necessary means are taken to assure safe operation. Open (j)(5) 35 citations
(6) Quality assurance. Open (j)(6) 8 citations
(i) In the construction of new plants and equipment, the employer shall assure that equipment as it is fabricated is suitable for the process application for which they will be used. Open (j)(6)(i)
(ii) Appropriate checks and inspections shall be performed to assure that equipment is installed properly and consistent with design specifications and the manufacturer's instructions. Open (j)(6)(ii) 7 citations
(iii) The employer shall assure that maintenance materials, spare parts and equipment are suitable for the process application for which they will be used. 1 citations
Source: eCFR, text current as of 2026-10-15. Read all of 1910.119.
Injuries linked to this rule
1 death is linked to inspections where OSHA cited 1910.119(j).
At 8:15 a.m. on July 3, 2024, Employee #1, Employee #2, and Employee #3 were inserting smoke composition material into aluminum pyrotechnic vessels when an explosion occurred. Employee #1 was fatally injured. Employee #2 was hospitalized, and Employee #3 sustained non-hospitalized injuries. The incident involved…
Where and how often it was cited
| Year | Citations |
|---|---|
| 2023 | 22 |
| 2024 | 78 |
| 2025 | 69 |
| 2026 | 58 |
Top states: TX (43), VA (17), OR (14), PA (14), OH (14)
Largest penalties
| Employer | Location | Penalty for this rule |
|---|---|---|
| ACCURATE ENERGETIC SYSTEMS, LLC | MC EWEN, TN | $210,000 |
| THE SHERWIN-WILLIAMS COMPANY | GARLAND, TX | $106,465 |
| TROY CHEMICAL CORPORATION | NEWARK, NJ | $58,600 |
| H.P. HOOD LLC | ONEIDA, NY | $44,923 |
| INTERTAPE POLYMER CORP | MARYSVILLE, MI | $44,100 |
Free toolbox talk
A 5-minute crew talk on 1910.119(j), plus alerts when this rule changes. Free.
OSHA interpretation letters
- Is reassembly of a cylinder valve a mechanical integrity activity? (2012-12-04)
- "Applicability of the PSM standard's mechanical intergrity requirements to refinery structures." (2010-02-01)
- PSM coverage of utility systems; whether 1910.269 preempts the PSM standard for power generation facilities that serve covered processes. (2008-01-31)
- PSM compliance for ammonia refrigeration systems. (2006-07-12)
- Requirement for flame-resistant clothing in petrochemical plant covered by PSM. (2006-03-07)
- Compliance with PSM and ANSI/ISA-S84.01 for safety instrumented systems (2000-03-23)
Related parts of this rule
- 1910.119(j)(4) Inspection and testing 96 citations
- 1910.119(j)(2) Written procedures 72 citations
- 1910.119(j)(5) Equipment deficiencies 35 citations
- 1910.119(j)(4)(i) 29 citations
- 1910.119(j)(4)(iii) 27 citations
- 1910.119(j)(4)(iv) 20 citations
- 1910.119(j)(4)(ii) 17 citations
- 1910.119(j)(3) Training for process maintenance activities 13 citations
- 1910.119(j)(6) Quality assurance 8 citations
- 1910.119(j)(6)(ii) 7 citations
- 1910.119(j)(1) Application 3 citations
- 1910.119(j)(6)(i)
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Frequently asked questions
What equipment does PSM mechanical integrity cover?
Pressure vessels and storage tanks, piping systems, relief and vent systems, emergency shutdown systems, controls, and pumps.
How often must process equipment be inspected?
Consistent with manufacturers' recommendations and good engineering practices, and more often if prior operating experience shows it is needed.
What must inspection records include?
The date, the inspector's name, the equipment's serial number or identifier, a description of the inspection or test, and the results.
About this page
Sources
- 29 CFR 1910.119 (eCFR), text current as of 2026-10-15
- U.S. Department of Labor enforcement data: OSHA inspections, citations and accident records, copied nightly; data as of 2026-10-21
3-year window. Federal OSHA only; state-plan rules are not counted. Plain-language text is a summary, not legal advice; the official text controls. Black Belt Safety is not part of OSHA or the Department of Labor.