Conveyor Lockout/Tagout Procedures: 1910.147 Compliance for Manufacturers

Published May 7, 2026 by LOTO Compliance

Conveyors are everywhere on a plant floor, and they generate a disproportionate share of LOTO injuries and citations. The pattern shows up across automotive supply, food and beverage, packaging, plastics, and metal stamping, the same niches where we run audits week to week. A maintenance tech reaches into a pinch point to clear a jam, the drive cycles back on, and the report writes itself. OSHA's enforcement record reflects the same pattern. Conveyors are one of the most-cited equipment categories under 1910.147 because the procedures sitting in the binder rarely match the conveyor sitting on the floor.

This guide walks the conveyor LOTO sequence the way an inspector reviews it. Start with the energy source list, lock through it, verify, document, repeat. The companion piece for the broader audit framework is our periodic inspection checklist, and our FY2025 citation breakdown covers the sub-paragraphs that drive the highest penalty exposure.

What a Conveyor Procedure Has to Cover

OSHA 1910.147(c)(4)(ii) lists the six required elements of every written energy control procedure. For a conveyor, those elements break down to a specific machine-level checklist. Generic boilerplate that says "isolate all energy sources" does not satisfy the standard. The inspector is going to ask which sources, in what order, with which device. Have the answer in writing, posted at the equipment.

• Specific use statement. Name the conveyor by asset tag and location. "Belt conveyor BC-204, Mill Line 2, north end" beats "all belt conveyors."
• Shutdown steps. The button to press, the sequence to follow, what stops first, and the position the system has to reach before isolation begins.
• Isolation steps. Each energy source named individually. Disconnect identification by tag and panel location. Block, pin, and bleed steps for non-electrical sources.
• Lock and tag placement. The hardware used (hasp, scissor lockout, valve cover, chain), the device it locks out, and the tag information required by 1910.147(c)(5)(ii).
• Verification. The "try it" step that proves zero energy state, including a check that mechanical components cannot rotate by hand.
• Release and re-energization. The sequence for area clearance, lock removal, notification, and start-up. Shift transfer language if the work crosses shifts.

Every one of those elements is its own potential citation if missing or incomplete. Multi-instance citations stack quickly when the same gap repeats across a conveyor line of six or eight machines.

Energy Sources on a Typical Conveyor

The most expensive mistake in conveyor LOTO is treating the main disconnect as the entire isolation. Electrical is one source. Real-world conveyors carry several others. Walk this list every time you build or update a procedure.

Electrical

The drive motor circuit, control power, and any auxiliary heaters or sensors. Lock the disconnect at the motor control center or the local disconnect, whichever serves the conveyor. If the conveyor is fed through a variable frequency drive, watch for separate control power that the main disconnect does not isolate. Disconnect-then-test with a meter on the load side. A non-contact tester is acceptable for the initial check, but a direct meter reading on a known-live, then known-dead, then known-live source under 1910.333 is the safer practice.

Gravitational

Inclined conveyors, declined conveyors, and any conveyor that carries product up or down a grade. The moment the drive de-energizes, gravity pulls the load downhill unless a brake or backstop is engaged and locked. On a tilted belt with product on it, the load can run away in seconds. Block the belt, install a mechanical stop, or remove the product before service. Mechanical backstops on the head pulley are not a substitute for a lockout when the procedure calls for entering the path of motion.

Stored Mechanical Energy

Belt tension, chain tension, and takeup counterweights. Gravity takeups can drop the takeup carriage if a belt is cut without first locking the takeup in place. Spring-loaded tensioners release when the belt is removed. The Mine Safety and Health Administration tracks fatalities every year from gravity takeups landing on workers cutting a belt; the same hazard exists in surface manufacturing. The procedure has to name the takeup, the locking device (a positive pin or chain block), and the verification that the takeup cannot fall.

Pneumatic and Hydraulic

Pneumatic clutch and brake systems on accumulating conveyors. Hydraulic lifts on transfer conveyors and elevating conveyors. Each system has a supply isolation valve and a way to bleed residual pressure. Both belong in the procedure. Closing a valve without bleeding the line leaves stored energy in the actuator, and a bumped lever can dump that pressure into a moving cylinder. The Department of Labor's OSHA 1910.147 standard text at (d)(5) is explicit on relieving and venting stored energy.

Thermal and Chemical

Less common, but worth checking. Heated tunnels on shrink-wrap conveyors carry residual heat. Coating and treating conveyors carry chemical hazards in the surrounding hood. If the service task brings an employee into either, the procedure has to address cooldown, ventilation, and personal protective equipment beyond the lockout itself.

The Isolation Sequence That Inspectors Expect

An OSHA compliance officer walks a plant the same way every time. Pick a conveyor, ask for the procedure, watch an authorized employee perform it. Discrepancies between the document and the field drive most of the citation count. Keep the sequence below in the same order on the procedure and in practice. Predictability beats flexibility when an inspector is on the floor.

1. Notify affected employees that LOTO is about to begin and that the conveyor will be down. Document the notification.
2. Shut down the conveyor through the normal operator stop. Allow the belt or chain to coast to a complete stop. Do not isolate energy until motion has stopped.
3. Isolate electrical energy at the named disconnect. Lock the disconnect handle in the off position with each authorized employee's personal lock through a multi-lock hasp.
4. Block, pin, or bleed every secondary energy source in the order listed on the procedure. Inclined sections get blocked first because gravity does not wait. Pneumatic lines bled before hydraulic so a pressure surprise does not affect a cylinder you have not yet addressed.
5. Verify zero energy state. Press start at the operator station with the machine still in lockout. The conveyor must not move. Manually rotate accessible drive components. They must not move under hand force. Meter the disconnect load side if any electrical work is in scope.
6. Perform the service work.
7. Restore the machine by reversing the steps. Confirm the area is clear of personnel and tools, remove locks in reverse of installation, notify affected employees, and re-energize.

The Citation Patterns We See on Conveyors

Across roughly 60 audits a year in conveyor-heavy plants, the same five gaps account for the majority of OSHA findings. None of them require sophisticated engineering to close. They require ownership of the procedure binder and the inspection calendar.

Procedure does not match the conveyor

The procedure was written when the conveyor had a chain drive. The plant retrofitted to a belt drive two years ago. The procedure was never updated. The disconnect named in the procedure no longer exists. Every authorized employee figures it out on their own. OSHA cites under 1910.147(c)(4)(i) every time they ask to see the procedure for the as-built conveyor.

Single-point lockout on multi-source equipment

One lock at the motor disconnect, no mention of takeup, no mention of pneumatic clutch, no mention of inclined gravitational hazard. The plant treats the disconnect as the whole isolation. A serious citation under 1910.147(c)(4)(ii) for incomplete procedure content.

Verification step missing

The procedure stops at "lock the disconnect." No "try the start button" step. No mechanical rotation check. The standard at 1910.147(d)(6) is explicit on verification, and the citation is almost automatic when the procedure is silent. We see this on roughly one in three plant-written conveyor procedures.

Affected-employee notification gap

Employees who load and unload the conveyor cannot describe what a lockout is or what to do when they see one. The site never trained affected employees beyond the authorized group. 1910.147(c)(7)(i) covers all three audiences. The fix is a 30-minute toolbox talk with a sign-in sheet, repeated annually.

Annual periodic inspection paperwork

The plant ran the inspection. The inspector watched the authorized employee perform the lockout. Nothing got written down. 1910.147(c)(6)(i) requires a certification that names the machine, the procedure, the date, the inspector, and the employees involved. Without that certification, the inspection counts as not having happened.

Conveyor LOTO in Specific Industries

The energy source mix shifts by industry. Tune the procedure to the conveyor type, not to a generic template.

Automotive supply

Powered roller and accumulating conveyors with pneumatic clutches. Vertical reciprocating conveyors connecting floor levels carry significant gravitational potential energy and require pin blocks plus electrical lockout. Body shop transfer conveyors integrate with robotic weld cells, which means the LOTO procedure has to coordinate with cell access control. Our gap analysis service covers automotive plants where conveyors and robotics share an isolation envelope.

Food and beverage

Sanitary belt conveyors with washdown duty. Disconnects often live in motor control centers far from the equipment, and "out of sight, out of mind" leads to single-employee removal of someone else's lock under shift change pressure. Stainless-clad MCCs need padlock-rated handles. Inclined elevators and bucket conveyors carry product gravitational hazard that survives the disconnect. Allergen-related cleanouts require entry into the conveyor path; full LOTO applies.

Packaging and plastics

Heat-sealed shrink tunnels and laminating conveyors carry thermal energy. Auxiliary motor circuits for blowers and fans run from separate disconnects. The procedure has to name each circuit, not just the main drive. Hot-melt glue and laminating equipment add a chemical and thermal layer to the isolation list.

Metal stamping and forming

Coil feed conveyors carry significant residual mechanical energy from coil tension. Roll-formed conveyors integrate with press operations, and the press LOTO and conveyor LOTO often need to interlock. Single-employee lockouts where one tech locks the conveyor and another locks the press without coordination produce equipment damage and near-misses on a regular basis.

The Fix: Procedure Binder Discipline

The single highest-leverage action a plant can take is to assign one named owner of the conveyor procedure binder, a master equipment list, and the periodic inspection calendar. Engineering change orders should not close until the LOTO update is signed off. Procedures should live at the conveyor (laminated, posted near the disconnect) in addition to the binder and the digital copy. Asset tags on the equipment should match the procedure ID. None of this is sophisticated. It is operations discipline, and every plant we audit that has it passes the LOTO portion of an OSHA visit cleanly.

The American National Standards Institute's ANSI Z244.1 aligns with 1910.147 and provides additional guidance on alternative methods, group lockout, and high-risk task analysis. ANSI Z244.1 is voluntary, but inspectors often reference it when evaluating whether a tagout-only program meets the equivalent protection bar.

Where ECPL Fits

The parent organization behind LOTO Compliance is ECPL, which has spent two decades writing machine-specific energy control procedures, building equipment placards, running annual third-party audits, and managing LOTO programs through LockStep software. The reason we publish a conveyor LOTO walkthrough is because conveyor citations are the most preventable category of LOTO findings and because most plants do not need a ground-up program rebuild. They need procedure-by-procedure tightening on the equipment they already operate.

Frequently Asked Questions

What energy sources need to be isolated on a conveyor?

Most conveyors carry electrical, gravitational, and stored mechanical energy. Powered roller and belt conveyors add pneumatic for clutches and brakes. Inclined and vertical conveyors carry significant gravitational potential energy that can release as soon as the drive is de-energized. Hydraulic lifts on accumulating conveyors add fluid pressure. A 1910.147(c)(4)(i) procedure has to name and isolate every source on that specific conveyor, not just the main disconnect.

Does pulling the main disconnect satisfy LOTO on a conveyor?

Not by itself. The disconnect handles electrical energy. Gravitational energy on inclines and verticals, residual belt tension, takeup counterweights, hydraulic accumulators, and pneumatic clutch reservoirs survive a main-disconnect lockout. The verification step under 1910.147(d)(6) catches the gap because employees can still rotate the drum or release a brake by hand. Block, drain, or pin every secondary source before service.

How do you handle conveyor LOTO during shift change?

Procedure-specific shift transfer is required by 1910.147(c)(4)(ii)(F). For conveyors that span shifts, the outgoing authorized employee installs a department or supervisor lock first, then removes their personal lock, and the incoming employee adds their personal lock before the supervisor lock comes off. The transfer is documented on the procedure or a transfer log so the chain of custody never breaks.

Are tagout-only programs acceptable on conveyors?

Rarely. 1910.147(c)(2)(iii) requires the employer to demonstrate that tagout provides protection equivalent to lockout, which means a second isolation step, additional training, and documented justification for why a lock could not be applied. Most conveyor disconnects, valves, and drive shafts accept a hasp or chain. Tagout-only programs on conveyors are flagged in roughly half of the OSHA inspections we see.

What about minor servicing and clearing a jam without LOTO?

1910.147(a)(2)(ii) carves out a minor servicing exception only when servicing is routine, repetitive, integral to use, and the employee is protected by an alternative measure such as a guard interlock or a control reliable circuit. Clearing a jam by reaching into a pinch point without isolating the drive is the textbook fatality pattern. If the task requires bypassing a guard or accessing a hazard zone, full LOTO applies.

How often do conveyor procedures need to be reviewed?

1910.147(c)(6)(i) requires a periodic inspection at least annually for every energy control procedure. Conveyors that get retrofitted, re-routed, or have new takeups installed need procedure updates the same day the engineering change closes, not at the next annual cycle. Management of change should trigger the LOTO update; otherwise the binder lags reality and the procedure no longer matches the equipment.