ASME B20.1-2021 pdf download.Safety Standard for Conveyors and Related Equipment.
1 SCOPE ThisStandardappliestothedesign,construction,instal- lation, maintenance, inspection, and operation of conveyors and conveying systems in relation to hazards. The conveyors may be of the bulk material, package, or unit-handling types, where the installation is designed for permanent, temporary, or portable opera- tion. This Standard shall apply, with the exceptions noted below, to all conveyor installations. This Standard specifically excludes any conveyor designed, installed, or used primarily for the movement of people. This Standard does, however, apply to certain conveying devices that incorporate within their supporting structure workstations or operator’s stations specifically designed for authorized operating personnel. This Standard does not apply to conveyors for which specific standards are already in effect, or to equipment such as industrial trucks, tractors, trailers, automatic guided vehicles, tiering machines (except pallet load tierers), cranes, hoists, power shovels, power scoops, bucket drag lines, trenchers, platform elevators designed to carry passengers or an operator, manlifts, moving walks, movingstairways (escalators), highwayorrailroad vehicles, cableways, tramways, dumbwaiters, material lifts, industrial scissors lifts, pneumatic conveyors, robots, or integral machine transfer devices. Some of the foregoing have specific standards. The provisions of this Standard shall apply to equip- ment installed 1 yr after the date of issuance.
4 DEFINITIONS 1 accessible: applies to hazardous objects not guarded or isolated and likely to be contacted inadvertently. actuator: a device that initiates the action of controls or controllers andis manuallyoperated. Theactuatormaybe a push button, toggle switch, footpedal, hand lever, hand- settimer, or anyother device thatperforms the described function. antirunaway: a safety device that stops a declining, inclined, or vertical conveyor and thus prevents it from moving away in the event of a mechanical or elec- trical failure. apron pan: one of a series of overlapping or interlocking plates or shapes that, together with others, form the conveyor bed. automatically controlled: describes the operation by the actionofamechanismthatisinitiatedbysomeimpersonal influence, such as a conveyor thatis started bya low-level bin indicator. backstop: a mechanical device to prevent reversal of a loaded conveyor under action of gravity when forward travel is interrupted. bed: (a) that part of a conveyor upon which the load or carrying medium rests or slides while being conveyed (b) in bulk material conveyors, the mass of material being conveyed beltidler: a roller or series ofrollers thatsupports the belt of a belt conveyor.ASME B20.1 pdf download.