ASME B20.1-2021 pdf free download.Safety Standard for Conveyors and Related Equipment
5 GENERAL SAFETY STANDARDS 3
5.1 Application Conveyor equipment shall be used to convey only the specified commodities or materials within the rated ca- pacity and the rated speed. Where special use is not indi- cated, or ratings are not available, good industry practice shall be used.
5.2 Maintenance (Repair)
(a) Maintenance and service shall be performed by qualified and trained personnel.
(b) Wherelackofmaintenanceandservicewouldcause a hazardous condition, the user shall establish a mainte- nance program to ensure that conveyor components are maintainedinaconditionthatdoesnotconstituteahazard to personnel.
(c) Nomaintenanceorserviceshallbeperformedwhen a conveyor is in operation exceptas provided in paras. 5.3 and 5.4.
(d) When a conveyor is stopped for maintenance or service, the starting devices, prime movers, or powered accessories shall be locked or tagged out in accordance with a formalized procedure designed to protect all persons or groups involved with the conveyor against an unexpected restart. Personnel should be alerted to the hazard of stored energy, which may exist after the power source is locked out. Refer to ANSI Z244.1-1982 and OSHA Standard 29 CFR 1910.147.
(e) All safety devices and guards shall be replaced before starting equipment for normal operation.
5.3 Lubrication (a) Conveyors shall not be lubricated while in opera- tion unless itis impractical to shutthem down for lubrica- tion. Only trained and qualified personnel who are aware ofthe hazards ofthe conveyor in motion shall be allowed to lubricate a conveyor that is operating. (b) Where the drip of lubricants or process liquids on the floorconstitutes a hazard, drip pans orother means of eliminating the hazard shall be provided.
5.4 Adjustment or Maintenance During Operation When adjustment or maintenance must be done while equipment is in operation, only trained and qualified per- sonnel who are aware of the hazard of the conveyor in motion shall be allowed to make the adjustment or perform the maintenance or service.
5.5 Backstops and Brakes Antirunaway, brake, or backstop devices shall be provided on all incline, decline, or vertical conveyors, where the effect of gravity will allow uncontrolled lowering of the load and where this movement will cause a hazard to personnel.
5.6 Overload Protection Where overload conditions would cause damage to equipmentthatcould resultin a personal injury, overload devices or suitable warning means shall be provided.
5.7 Gates and Switches (a) Power-positioned gate and switch sections shall be provided with devices that will prevent these sections from falling in case of power failure. (b) Means shall be provided on all gate and switch sections to prevent conveyed material from discharging into the open area created by lifting ofthe gate or switch.
5.8 Counterweights When counterweights are supported by belts, cables, chains, and similar means, weights shall be confined in an enclosure to prevent the presence of personnel beneaththecounterweight. As analternative, thearrangementshall provideameanstorestrainthefallingweightin case of failure of the normal counterweight support.
5.9 Guards and Guarding
5.9.1 General Requirements of Guarding 5.9.1.1 Guarding. Where necessary for the protec- tion of personnel from hazards, all exposed moving machinery parts that present a hazard to personnel at workstations or operators’ stations shall be mechanically or electricallyguarded or guarded bylocation or position.ASME B20.1 pdf download.ASME B20.1-2021 pdf free download
