An Industrial Maintenance Safety Manual provides the written safety programs, policies, procedures, and employee responsibilities needed for companies and employees that inspect, maintain, troubleshoot, repair, service, modify, install, and replace industrial equipment and facility systems. Industrial maintenance work frequently requires employees to perform non-routine tasks on machinery, electrical systems, piping, pressure systems, elevated equipment, process systems, and other equipment containing hazardous energy.
A properly developed Industrial Maintenance Safety Manual should reflect the company’s actual maintenance activities, equipment, facilities, employees, contractors, and work environments. Industrial maintenance contractors, manufacturing facilities, processing plants, warehouses, utilities, distribution facilities, and other industrial operations may require different combinations of safety programs and procedures.
The safety programs needed for industrial maintenance depend on the equipment, systems, and work performed. A comprehensive manual may include programs covering:
Programs that do not apply to the company’s maintenance activities can be removed, while additional programs should be included when specialized equipment or processes create additional hazards.
Maintenance work differs from routine production because employees often work on equipment while guards are removed, systems are opened, components are disassembled, energy sources are isolated, and normal operating conditions are intentionally changed.
Maintenance planning should consider:
Employees should understand the work scope and required controls before maintenance begins.
Maintenance work should be evaluated before employees begin the task.
Pre-job planning may include:
The level of planning should reflect the complexity and hazards of the work.
A Job Safety Analysis (JSA) can help identify hazards and controls before maintenance begins.
JSAs may be appropriate for:
The JSA should identify the steps of the task, associated hazards, and controls needed to perform the work safely.
When conditions or the work scope change, the JSA should be reviewed and updated as necessary.
Control of hazardous energy is one of the most important elements of industrial maintenance safety.
Employees performing servicing or maintenance where unexpected energization, startup, or release of stored energy could cause injury should follow applicable energy-control procedures.
Hazardous energy may include:
Simply shutting equipment off with its normal operating controls does not constitute energy isolation.
Equipment-specific energy-control procedures should identify the steps necessary to safely shut down, isolate, block, secure, and verify equipment before servicing.
Procedures may identify:
Authorized employees should understand and follow the applicable procedure.
Before maintenance begins, authorized employees should verify that isolation has been effective.
Verification may include:
After verification, controls used for testing should be returned to the appropriate position.
Employees should never assume equipment is de-energized merely because another employee says it has been shut down.
Stored energy can remain after primary energy sources have been isolated.
Examples include:
Stored energy should be relieved, disconnected, restrained, blocked, dissipated, or otherwise rendered safe before work begins.
If stored energy can reaccumulate, employees should continue to verify that safe conditions are maintained.
Industrial maintenance frequently involves multiple employees, crafts, or contractors working on the same equipment.
Group lockout/tagout procedures should provide each authorized employee with protection equivalent to personal lockout/tagout.
Procedures should address:
Each authorized employee should apply and remove their own personal lock or equivalent protection as required by the procedure.
Maintenance activities may continue across multiple shifts.
Procedures should ensure continuous energy-control protection during shift or personnel changes.
Incoming employees should understand:
Locks should not simply be removed at the end of a shift without an orderly transfer of protection.
Industrial maintenance employees may encounter electrical panels, motors, disconnects, controls, transformers, wiring, equipment, and temporary electrical systems.
Electrical equipment should normally be placed in an electrically safe condition before maintenance when required.
Only qualified employees should perform electrical work requiring specialized knowledge or work on or near exposed energized electrical parts.
Employees should understand the limitations of their electrical qualifications.
Electrical maintenance may expose qualified employees to shock, arc-flash, and arc-blast hazards.
Electrical safety procedures should address:
Where applicable, electrical equipment labeling and available electrical-safety information should be reviewed before work begins.
Working on energized electrical equipment should not become routine merely because shutting equipment down is inconvenient.
When energized work is permitted under applicable requirements, appropriate procedures should be established.
Planning may include:
Only qualified employees should perform energized electrical work.
Some troubleshooting and diagnostic activities may require equipment to be energized for testing.
Employees should establish controls appropriate to the electrical hazard.
After testing is complete, equipment should be de-energized and appropriate energy-control procedures implemented before repair or physical servicing begins when required.
Employees should not treat troubleshooting as authorization to perform unrelated maintenance on energized equipment.
Electrical test instruments should be suitable for the circuits and environment in which they are used.
Employees should inspect:
Qualified employees should understand the limitations of their test instruments.
A known-source test may be appropriate before and after verifying absence of voltage.
Maintenance employees frequently work on machinery with guards, covers, barriers, and interlocks.
Machine guards should remain in place during normal operation.
Employees should not remove or bypass guards unless necessary for authorized servicing or maintenance and required hazardous-energy controls have been established.
After maintenance, required guards and safety devices should be restored before equipment is returned to normal operation.
When guards must be removed for maintenance:
Employees should not leave operating machinery inadequately guarded after completing maintenance.
Interlocks, presence-sensing devices, emergency stops, light curtains, guards, and other machine-safety devices should not be bypassed merely to make maintenance faster.
When temporary bypassing is necessary for authorized testing or adjustment, additional controls should be established and the safety system restored before normal operation.
Defective safety devices should be reported and corrected.
Conveyors can expose employees to nip points, moving belts, rollers, chains, sprockets, stored tension, gravity, and unexpected startup.
Before servicing conveyors:
Employees should not reach into or climb onto operating conveyors unless specifically permitted by an appropriate procedure that protects them from the hazards.
Pump systems may contain electrical, mechanical, hydraulic, chemical, pressure, and thermal hazards.
Before maintenance:
Employees should anticipate trapped pressure or material between valves and equipment.
Valves may isolate hazardous chemicals, steam, compressed air, water, gases, or other process materials.
Before removing or servicing a valve, employees should verify:
Employees should not loosen flanges, fittings, or valve components until the potential for hazardous release has been evaluated.
Opening process piping can expose employees to unexpected releases of pressure, chemicals, gases, steam, hot liquids, or other hazardous materials.
Line-breaking procedures should address:
Employees should assume residual material may remain in a line even after draining.
When opening piping, employees should position themselves to minimize exposure to an unexpected release.
Fasteners should be loosened using a controlled method appropriate to the system and procedure.
Employees should not place their face or body directly in front of a flange, fitting, plug, cap, or other potential release point.
Required chemical-resistant PPE and face protection should be used when exposure is possible.
Industrial maintenance may involve:
Pressure should be relieved before equipment is opened or disassembled when required.
Employees should verify that gauges and indicators accurately reflect system conditions and should consider the possibility of isolated pockets of trapped pressure.
Hydraulic systems can retain extremely high pressure after equipment is shut down.
Employees should:
High-pressure fluid injection injuries require prompt medical attention.
Compressed air and pneumatic systems can create stored-energy and projectile hazards.
Before servicing:
Employees should never use compressed air to clean themselves or another person.
Steam, hot water, heated equipment, furnaces, ovens, process piping, and other thermal systems can cause severe burns.
Maintenance planning should address:
Employees should verify that equipment has reached a safe condition before opening or servicing it.
Industrial maintenance employees may enter tanks, vessels, pits, vaults, ducts, process equipment, and other confined spaces.
Confined spaces should be identified and evaluated before entry.
Permit-required confined-space procedures may address:
Maintenance schedules should not be allowed to bypass required confined-space protections.
Maintenance in confined spaces may require isolation from:
Isolation methods should be appropriate to the hazards and applicable procedures.
Employees should verify required isolation before entry begins.
Rescue provisions should be established before permit-required confined-space entry.
Planning should consider:
Employees should not make an unplanned entry into a hazardous confined space to attempt a rescue.
Maintenance employees frequently perform welding, cutting, brazing, soldering, and grinding.
Before hot work begins:
Hot-work permits should be used when required.
Hot work on tanks, vessels, piping, or process equipment requires additional evaluation.
Equipment that has contained flammable, combustible, toxic, or reactive materials should not be assumed safe merely because it has been drained.
Appropriate isolation, cleaning, purging, atmospheric testing, and authorization should be established before hot work begins.
Maintenance operations may use oxygen, acetylene, shielding gases, nitrogen, refrigerants, and other compressed gases.
Cylinders should be:
Valve-protection caps should be installed when required.
Employees should understand the hazards associated with each gas they use.
Maintenance employees use a wide range of tools, including:
Tools should be inspected before use, appropriate for the task, and used according to manufacturer instructions.
Guards and safety devices should not be removed or defeated.
Damaged tools should be removed from service.
Grinding operations may expose employees to flying particles, sparks, noise, rotating equipment, and wheel failures.
Employees should:
Grinding should be evaluated as hot work when sparks could ignite combustible materials.
Portable electrical tools, extension cords, and temporary power equipment should be inspected and maintained.
Employees should report:
Electrical equipment should be appropriate for the environment in which it is used.
Maintenance employees may work on:
Fall hazards should be evaluated before work begins.
Protection may include guardrails, personal fall arrest systems, positioning systems, covers, platforms, or other appropriate methods.
Aerial lifts may be used for lighting, piping, electrical, HVAC, structural, and equipment maintenance.
Only trained and authorized employees should operate aerial lifts.
Employees should:
Employees should not climb on platform rails to obtain additional reach.
Ladders used for maintenance should be appropriate for the task and inspected before use.
Employees should:
Damaged ladders should be removed from service.
Maintenance projects may require supported, mobile, or other scaffold systems.
Scaffolds should be erected, inspected, accessed, and used according to applicable requirements.
Employees should understand scaffold capacity, access, fall protection, falling-object hazards, and prohibited practices.
Maintenance employees may use cranes, hoists, chain falls, come-alongs, gantry systems, and other lifting equipment to remove or install motors, pumps, valves, machinery, and equipment components.
Lift planning should address:
Employees should remain clear of suspended loads.
Slings, shackles, hooks, lifting beams, hoist rings, and other rigging equipment should be selected for the intended load and inspected as required.
Rigging personnel should consider:
Damaged rigging should be removed from service.
Industrial facilities may use overhead cranes, jib cranes, monorails, chain hoists, and other lifting systems.
Employees should:
Hoists should not be overloaded or modified contrary to manufacturer requirements.
Forklifts may be used to move maintenance equipment, parts, tools, motors, materials, and supplies.
Only trained and authorized employees should operate powered industrial trucks.
Operators should inspect equipment, observe capacity, maintain visibility, control speed, and remain alert to pedestrians.
Forklifts should not be improvised as personnel-lifting devices.
PPE should be selected based on the hazards associated with the maintenance task.
Common maintenance PPE may include:
Employees should inspect PPE before use and replace damaged equipment.
Maintenance employees may work with lubricants, solvents, cleaners, paints, adhesives, fuels, refrigerants, treatment chemicals, welding materials, and process chemicals.
The Hazard Communication Program should address:
Maintenance employees should review hazards before working with unfamiliar chemicals or opening process systems containing hazardous substances.
Maintenance work may expose employees to welding fumes, dust, vapors, gases, process chemicals, or other airborne contaminants.
Engineering and work-practice controls should be used as required.
When respirators are necessary, the Respiratory Protection Program should address:
Respirators should not be used as a substitute for required engineering controls when those controls are feasible and required.
Industrial maintenance may involve high-noise equipment, grinders, impact tools, compressed air, machinery, and process areas.
Employee noise exposures should be evaluated.
A Hearing Conservation Program should be implemented when required.
Employees should use hearing protection appropriate to their exposures and receive required training.
Industrial maintenance contractors frequently perform work inside operating customer facilities.
Before work begins, the contractor and host employer should exchange relevant hazard information and coordinate applicable safety procedures.
Coordination may include:
Contractor employees should understand which procedures apply to their work.
Maintenance activities may occur while production, construction, cleaning, material handling, or other maintenance work continues nearby.
Pre-job planning should consider how one activity could affect another.
Potential conflicts may include:
Work should be coordinated to prevent one operation from creating uncontrolled hazards for another.
Non-routine work often presents greater risk because employees may have less experience with the task and established procedures may not fully address the conditions.
Before non-routine maintenance:
Employees should stop and reevaluate the work when unexpected conditions are discovered.
Troubleshooting may require employees to observe equipment while it is operating or energized.
The need to diagnose a problem does not eliminate applicable safety requirements.
Troubleshooting procedures should distinguish between:
When the task changes from diagnostic work to servicing or repair, required hazardous-energy controls should be implemented.
Some minor servicing activities may occur during normal production operations.
Before relying on an exception to normal lockout/tagout procedures, the company should verify that the work actually meets applicable criteria and that effective alternative protection is provided.
Convenience, production pressure, or short task duration alone does not justify bypassing hazardous-energy controls.
Plant shutdowns and turnarounds can involve large numbers of employees and contractors performing maintenance simultaneously.
Planning should address:
Shutdown schedules should allow sufficient time to perform work safely.
Returning equipment to service requires careful coordination.
Before startup:
Employees should anticipate unexpected movement, leaks, pressure, vibration, or other abnormal conditions during initial startup.
Newly installed or substantially modified equipment should be evaluated before normal operation.
Commissioning may include:
Temporary commissioning conditions should not become permanent operating practices.
Preventive maintenance can reduce equipment failures that expose employees to emergency and unplanned repair work.
Programs may address:
Maintenance records should be maintained as appropriate to the equipment and facility.
Maintenance shops should be organized to control hazards associated with tools, machinery, chemicals, welding, compressed gases, parts storage, and material handling.
Work areas should provide:
Shop machinery should be operated only by employees trained and authorized to use it.
Maintenance work can create hoses, cords, tools, removed components, spills, scrap, packaging, and other hazards.
Employees should maintain orderly work areas and keep:
Maintenance areas should be cleaned before equipment is returned to normal operation.
Leaks, lubricants, coolants, hoses, cords, removed parts, tools, and uneven surfaces can create slip and trip hazards.
Spills should be cleaned promptly.
Cords and hoses should be routed to minimize trip hazards.
Employees should report damaged walking surfaces, stairs, platforms, railings, and grating.
Maintenance work may be performed outdoors, in mechanical rooms, near hot process equipment, in refrigerated areas, or during facility shutdowns with reduced environmental controls.
Heat- and cold-stress procedures should address:
Temperature conditions should be considered during pre-job planning.
Industrial maintenance operations should plan for foreseeable emergencies.
Potential emergencies include:
Employees should know how to stop work, secure the area when possible, summon assistance, and communicate the location and nature of the emergency.
Employees should receive training appropriate to their assigned maintenance responsibilities and exposures.
Training may include:
Training should be documented and updated when equipment, processes, procedures, employee responsibilities, or regulatory requirements change.
An Industrial Maintenance Safety Manual should be customized to the company’s actual maintenance activities rather than relying solely on a generic industrial or manufacturing safety manual.
A maintenance contractor performing mechanical repairs and equipment installations may require a different combination of programs than an in-house maintenance department responsible for electrical systems, process piping, conveyors, boilers, production machinery, building systems, and preventive maintenance.
A contractor performing shutdown and turnaround work may require additional procedures for group lockout/tagout, confined spaces, hot work, cranes and rigging, scaffolding, contractor coordination, and simultaneous operations.
The manual should reflect the equipment serviced, energy sources, electrical systems, process hazards, maintenance tools, lifting equipment, employee qualifications, facility conditions, and customer requirements applicable to the work.
The completed safety manual should provide practical procedures employees and supervisors can use while supporting OSHA compliance, employee training, pre-job planning, JSAs, inspections, incident investigations, contractor coordination, preventive maintenance, and the company’s overall safety-management system.
Get an Industrial Maintenance Safety Manual customized for your machinery, electrical systems, LOTO procedures, process piping, pumps, conveyors, pressure systems, confined spaces, hot work, maintenance shops, shutdowns and turnarounds, cranes and rigging, aerial lifts, chemicals, and other industrial maintenance hazards.