Equipment Preservation During Construction JHA (Job Hazard Analysis / Activity Hazard Analysis)
Updated 2026-06-23
A Equipment Preservation During Construction JHA (Job Hazard Analysis / Activity Hazard Analysis) is the plan that keeps the crew preserving equipment during construction safe from the preservation chemicals and desiccants, from the access and handling, and from turning rotating equipment. Equipment preservation during construction protects installed-but-not-yet-operating equipment from corrosion and damage — combining the preservation-chemical and desiccant hazard, the access and handling hazard, and the rotating-equipment-turning hazard. This guide walks through building a Equipment Preservation During Construction JHA that names the preservation-chemical/desiccant, access/handling, and rotating-equipment-turning hazards and assigns the chemical, access, and rotating-equipment controls that hold up in the field.
Why equipment preservation during construction needs its own JHA
Equipment preservation during construction protects installed but not-yet-operating equipment (motors, pumps, turbines, generators, gearboxes, electrical gear) from corrosion, moisture, and damage during the construction/ commissioning period — applying preservation measures such as vapor-corrosion-inhibitor (VCI) chemicals, desiccants, space heaters, nitrogen blankets, protective coverings, and periodic shaft rotation of rotating equipment. The defining features are the preservation chemicals/desiccants and the periodic maintenance of the equipment (including turning rotating equipment). The hazards combine the preservation chemical and desiccant (the preservation materials — VCI chemicals, desiccants, preservative oils — are chemicals with skin/eye/ inhalation exposure, and any nitrogen blanket is an asphyxiation hazard in enclosed equipment/spaces), the access and handling (accessing the equipment to apply/maintain preservation — the access, at-height/awkward positions, and handling coverings/materials), the rotating-equipment turning (periodic shaft rotation of rotating equipment during preservation — the rotating-equipment hazard when turning shafts by hand/turning gear), and the electrical (space heaters and any energized preservation equipment). The preservation-chemical/ desiccant and the access/handling justify a dedicated JHA.
Breaking equipment preservation during construction into steps
The steps for a Equipment Preservation During Construction JHA follow the preservation:
- Review the preservation plan and materials (SDS)
- Establish chemical and access controls
- Apply the preservation measures (VCI, desiccant, covers, heaters)
- Perform periodic preservation maintenance
- Turn rotating-equipment shafts safely (where required)
- Manage the chemical, access, and rotating-equipment hazards
- Monitor the preservation (desiccant, heaters, nitrogen)
- Document and maintain
Each step carries a hazard, and the preservation chemical/desiccant, the access/handling, and the rotating-equipment turning are where the most significant risks concentrate.
The hazards step by step
Preservation chemical and desiccant
The preservation materials — VCI chemicals, desiccants, preservative oils — are chemicals with skin/eye/ inhalation exposure, and any nitrogen blanket is an asphyxiation hazard in enclosed equipment/spaces. The controls are reviewing the SDS for the preservation materials, chemical PPE (gloves, eye protection, respiratory protection where needed), ventilation, asphyxiation controls where nitrogen blankets are used (no entry into nitrogen-blanketed spaces without confined-space/atmosphere controls), and the chemical controls. The preservation-chemical/desiccant (and nitrogen) is a defining hazard. (These follow the chemical-handling and asphyxiant fundamentals.)
Access and handling
Accessing the equipment to apply and maintain preservation brings the access hazards (at-height or awkward positions on/around the equipment) and handling coverings/materials. The controls are safe access (stable ladders/lifts, fall protection where at height), managing the awkward positions, safe handling of coverings/ materials, and the access controls. (These follow the working-at-height fundamentals.)
Rotating-equipment turning
Periodic shaft rotation of rotating equipment during preservation brings the rotating-equipment hazard when turning shafts by hand or turning gear (pinch, entanglement, the stored energy). The controls are safe shaft turning (per procedure, controlled turning, keeping hands/body clear of pinch/entanglement points, ensuring the equipment cannot start/be energized during manual turning — LOTO), and the rotating-equipment controls. The rotating-equipment turning is a defining hazard. (These follow the rotating-equipment fundamentals.)
Electrical
The electrical (space heaters and any energized preservation equipment) carries the electrical hazard. The controls are safe electrical (GFCI/proper connection for space heaters, safe energized preservation equipment), and the electrical controls. (These follow the electrical fundamentals.)
A simple Equipment Preservation During Construction JHA structure
| Step | Hazard | Control | Standard |
|---|---|---|---|
| Review plan/materials | Chemical | Review preservation plan and materials (SDS) | OSHA 1910.1200 |
| Establish controls | Chemical / nitrogen | Chemical PPE, ventilation, asphyxiation controls for nitrogen | OSHA 1910.146 |
| Apply preservation | Chemical / access | Apply VCI/desiccant/covers/heaters, safe access | OSHA 1926.501 |
| Turn shafts | Rotating equipment | Safe shaft turning, LOTO so equipment can't start | OSHA 1910.147 |
| Electrical | Shock | GFCI/safe connection for space heaters | NFPA 70 |
| Monitor/document | Preservation | Monitor desiccant/heaters/nitrogen, document | manufacturer |
Chemical/asphyxiant control and safe rotating-equipment turning
A Equipment Preservation During Construction JHA centers on chemical/asphyxiant control and safe rotating-equipment turning. The chemical/asphyxiant control addresses the preservation chemicals, desiccants, and nitrogen — controlled by SDS review, chemical PPE, ventilation, and asphyxiation controls where nitrogen blankets are used (no entry into nitrogen-blanketed spaces without atmosphere controls). The safe rotating-equipment turning addresses the periodic shaft rotation — controlled by safe shaft turning (controlled, hands/body clear of pinch/entanglement, LOTO so the equipment cannot start during manual turning). And the access gets safe-access controls. A JHA built on chemical/asphyxiant control and safe rotating-equipment turning, with access and electrical controls, addresses the hazards that define equipment preservation during construction.
From the field: what actually goes wrong
In fourteen years across federal, heavy civil, and industrial projects, equipment preservation during construction is the ongoing task of protecting expensive installed equipment from corrosion and damage while it waits to be commissioned, and its hazards come from the preservation materials and the periodic maintenance. The preservation chemical and desiccant is the first hazard — the preservation materials (vapor-corrosion- inhibitor chemicals, desiccants, preservative oils) are chemicals with skin, eye, and inhalation exposure hazards, controlled by SDS review, chemical PPE, and ventilation. A specific and easily-overlooked hazard is nitrogen: some equipment is preserved under a nitrogen blanket (to exclude oxygen and moisture), and nitrogen is an asphyxiant — so an enclosed piece of equipment or space under a nitrogen blanket is an asphyxiation hazard, and no one enters a nitrogen-blanketed space without confined-space and atmosphere controls. The nitrogen asphyxiation risk is the one that can be fatal and is the least obvious.
The rotating-equipment turning and the access are the other defining hazards. On the projects I have run, preservation of rotating equipment (motors, pumps, turbines, gearboxes) includes periodic shaft rotation — you turn the shafts periodically to redistribute lubricant and prevent bearing damage — and turning shafts by hand or with a turning gear brings pinch and entanglement hazards, and the risk of the equipment starting or being energized while someone is turning it manually. So safe shaft turning (controlled, hands and body clear of pinch and entanglement points, and — critically — LOTO so the equipment cannot start or be energized during the manual turning) is the control. The access to apply and maintain the preservation (at-height or awkward positions, controlled by safe access) and the electrical (space heaters with GFCI/proper connection) round out the hazards. The discipline that matters most is the nitrogen asphyxiation awareness and the LOTO during shaft turning. The JHA built on chemical/asphyxiant control and safe rotating-equipment turning is the one that protects the preservation crew.
The bottom line
A Equipment Preservation During Construction JHA names the preservation-chemical/desiccant, the access/handling, and the rotating-equipment-turning hazards with specific controls — SDS-based chemical PPE with nitrogen- asphyxiation controls for the preservation materials, safe access for applying/maintaining preservation, and safe shaft turning with LOTO so the equipment cannot start during manual rotation. The preservation chemical/ nitrogen and the rotating-equipment turning are the defining concerns. The JHA that manages both is the one that protects the crew.
Frequently asked questions
Why is nitrogen a defining hazard in equipment preservation?
Some equipment is preserved under a nitrogen blanket (to exclude oxygen and moisture), and nitrogen is an asphyxiant — so an enclosed piece of equipment or space under a nitrogen blanket is an asphyxiation hazard, the one that can be fatal and is the least obvious. Controls are asphyxiation controls where nitrogen blankets are used (no entry into nitrogen-blanketed spaces without confined-space/atmosphere controls, testing the atmosphere, ventilation before entry), and awareness of which equipment is nitrogen-blanketed.
Why must equipment be locked out during shaft turning?
Preservation of rotating equipment includes periodic shaft rotation to redistribute lubricant and prevent bearing damage, and turning shafts by hand or with a turning gear brings pinch and entanglement hazards — plus the risk of the equipment starting or being energized while someone is manually turning it. Controls are LOTO so the equipment cannot start or be energized during the manual turning, safe controlled shaft turning, and keeping hands/body clear of pinch and entanglement points.
What chemical hazards do preservation materials pose?
The preservation materials — VCI chemicals, desiccants, preservative oils — are chemicals with skin/eye/inhalation exposure hazards. Controls are reviewing the SDS for the preservation materials, chemical PPE (gloves, eye protection, respiratory protection where needed), ventilation, and the chemical controls, alongside the nitrogen-asphyxiation controls where nitrogen blankets are used.
What is equipment preservation during construction?
Equipment preservation during construction protects installed but not-yet-operating equipment (motors, pumps, turbines, generators, gearboxes, electrical gear) from corrosion, moisture, and damage during the construction/commissioning period — using VCI chemicals, desiccants, space heaters, nitrogen blankets, protective coverings, and periodic shaft rotation. It keeps expensive equipment from degrading before it is commissioned, and its hazards are the preservation chemicals/nitrogen, the access, and the rotating-equipment turning.
Related JHAs
- Mechanical Equipment Rotation Checks JHA — the related shaft-rotation checks
- Equipment Commissioning JHA — commissioning the preserved equipment
- Industrial Equipment Installation JHA — installing the equipment preserved
- Mission Critical Equipment Protection JHA — related equipment-protection work
Written by Mustafa Tok, CSP, ASP, CHST — OSHA Authorized Outreach Trainer with 14+ years of international construction safety experience across federal, heavy civil, and industrial projects.