The Definition of Conveyor Safety

Definition of Conveyor Safety

Conveyor safety is the set of practices, guards and controls that prevent injuries from belt, roller, screw, chain and overhead conveyors.

Conveyors move product and bulk material all day, often with little noise or warning. That makes them easy to underestimate. A worker reaching in to clear a jam, clean spillage or adjust a belt can be pulled into a nip point in a fraction of a second. Conveyor incidents can cause amputations, crushing injuries and deaths.

Conveyor safety applies in warehouses and distribution centers, manufacturing plants, food processing, mining, aggregates and construction. It involves operators, maintenance technicians, cleaning crews, supervisors and the engineers who design and modify conveyor systems.

Key Hazards and Controls in Conveyor Safety

Common Conveyor Hazards

• Nip points: In-running points at head and tail pulleys, return rollers and drives can draw in hands, clothing and tools.
• Pinch and shear points: These form between moving parts and fixed structures, such as at transfer points and chain conveyor sprockets.
• Entanglement: Rotating shafts, couplings and screw flights can catch loose clothing, hair or gloves.
• Falling material: Product can fall from overhead conveyors or spill from belts onto walkways.
• Unexpected start-up: A conveyor started remotely or automatically can injure someone working on it.
• Crossing over or under: Workers who climb over or duck under a running conveyor risk falls and contact with moving parts.

Engineering Controls

• Fixed guards: Fixed guards and nip guards enclose pulleys, drives, shafts and take-ups.
• Emergency stops: Pull-cord switches along the length of the conveyor let anyone stop it from any point.
• Start-up warnings: Horns or lights warn people before a conveyor starts, especially where the full length is not visible.
• Crossovers: Bridges let workers cross conveyors safely instead of climbing over them.
• Spillage control: Skirting, belt cleaners and good transfer design reduce the need to clean near moving parts.

Safe Work Practices

• Lockout: Apply lockout/tagout before cleaning, clearing jams or doing maintenance.
• No riding: Never ride on a conveyor.
• Clothing: Avoid loose clothing, jewelry and loose long hair near moving parts.
• Safe cleaning: Clean spillage from a safe position with guards in place, or with the conveyor locked out.

Regulations and Standards

OSHA General Industry

OSHA's general industry rules do not include a single conveyor standard. Conveyor hazards fall under 29 CFR 1910.212, the general machine guarding requirement that covers hazards such as in-running nip points and rotating parts, and 29 CFR 1910.219, which covers mechanical power-transmission apparatus such as pulleys, belts, shafts, gears and sprockets. Lockout during servicing and maintenance is covered by 29 CFR 1910.147.

OSHA Construction

For construction, 29 CFR 1926.555 sets specific conveyor requirements:

• Stopping means: A means for stopping the conveyor motor or engine must be provided at the operator's station.
• Start-up warning: An audible warning signal must sound before start-up where the entire length of the conveyor is not visible from the operator's station.
• Emergency stops and crossovers: Emergency stop devices or crossovers must be provided where needed.
• Screw and overhead conveyors: Screw conveyors must be guarded, and overhead conveyors must be guarded against falling material.
• Repairs: Conveyors must be locked out during repair.

MSHA

At metal and nonmetal mines, 30 CFR 56.14107 requires moving machine parts to be guarded, including head, tail, drive and takeup pulleys. Under 30 CFR 56.14109, unguarded conveyors next to travelways must have emergency stop devices along their length or railings that keep people from falling onto the conveyor. Under 30 CFR 56.14105, repairs and maintenance must be done with the power off and the machinery blocked against hazardous motion.

ASME B20.1

ASME B20.1, Safety Standard for Conveyors and Related Equipment, is a voluntary consensus standard for the design, construction, installation, operation and maintenance of conveyors. Check the current edition when specifying new equipment or modifying existing systems.

Good Practices for Conveyor Safety

• Guard every nip point: Survey each conveyor for exposed pulleys, rollers and drives, and install guards that prevent reaching in from any side.
• Test emergency stops: Check pull cords and emergency stop switches on a set schedule, and confirm they stop the conveyor and need a deliberate reset.
• Lock out for every jam: Treat clearing jams and cleaning under the belt as lockout tasks, not quick fixes.
• Warn before start-up: Use horns or lights with a delay long enough for people to move clear.
• Provide crossovers: Install crossover bridges along natural walking paths so no one climbs over or ducks under a running belt.
• Design out spillage: Fix transfer points, skirting and belt cleaners so workers spend less time near moving parts.
• Inspect regularly: Include guards, stops, warning devices and belt tracking in routine equipment inspections, and fix defects before restart.

Example of Conveyor Safety

A regional aggregates producer had a recurring spillage problem under a long transfer conveyor. Plant workers routinely shoveled material from under the tail pulley while the belt ran, because shutting down slowed production. One afternoon, a laborer's shovel was caught by the return belt and dragged toward the tail pulley. He let go in time, and the event was reported as a serious near miss involving a caught-in hazard.

The company extended the tail pulley guard to cover the full nip area and added a pull-cord emergency stop along the walkway. It rebuilt the transfer chute and skirting to cut spillage at the source, and made cleanup under the belt a lockout task during a scheduled daily shutdown. Guard condition, pull-cord tests and start-up horns were added to a weekly checklist in SafetyIQ's equipment inspection software, and supervisors now track open defects until they are closed.

Frequently Asked Questions: Conveyor Safety

What are the main hazards of conveyors?

The main hazards are nip points at pulleys and rollers, pinch and shear points, entanglement in rotating parts, falling material and unexpected start-up. Many serious injuries happen during cleaning, clearing jams or maintenance while the conveyor is running.

Do conveyors need emergency stop pull cords?

It depends on the setting and the regulation. OSHA's construction standard requires emergency stop devices or crossovers where needed, and MSHA requires emergency stops or railings on unguarded conveyors next to travelways. Pull cords along the full length are a widely used good practice even where they are not specifically required.

Is it safe to clean a conveyor while it is running?

Cleaning near moving parts is one of the riskiest conveyor tasks. Clean only from a safe position with guards in place, or lock out the conveyor first. At mines, repairs and maintenance must be done with the power off and the machinery blocked against motion.

What standards cover conveyor safety?

In the United States, OSHA covers conveyors under 29 CFR 1910.212 and 1910.219 in general industry and 29 CFR 1926.555 in construction. MSHA standards such as 30 CFR 56.14107 apply at mines, and ASME B20.1 is the voluntary consensus standard for conveyor design and operation.