ASME B20.1:2006 pdf download

ASME B20.1:2006 pdf download.Safety Standard for Conveyors and Related Equipment
1 SCOPE
This Standard applies to the design, construction, installation, 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 operation. 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 conveyingdevices thatincorporate withintheirsupport- ing structure workstations or operator’s stations specifi- cally designed for authorized operating personnel. This Standard does not apply to conveyors such as underground mine conveyors for which specific stan- dards are alreadyineffector to equipmentsuchas indus- trial 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 passen- gers or an operator, manlifts, moving walks, moving stairways (escalators), highway or railroad vehicles, cableways, tramways, dumbwaiters, pneumatic con- veyors, 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 year after the date of issuance.
2 REFERENCE TO OTHER CODES
Certain other codes and standards have been cited as references in this Standard. Reference to them does not constitute inclusion of the complete text of such codes or standards as a part of this Standard. This Safety Standard for conveyors is supplementary to any law or code covering fire or health regulations.
4 DEFINITIONS
actuator: a device that initiates the action of controls or controllers and is manually operated. The actuator may be a push button, toggle switch, foot pedal, hand lever, hand-set timer, or any other device that performs the described function. antirunaway: a safety device to stop a declining conveyor and thus preventmovingawayinthe eventofamechani- cal or electrical 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 be the action of a mechanism that is initiated by some imper- sonal influence, such as a conveyor that is started by a 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 belt idler: a roller or series of rollers that supports the belt of a belt conveyor.belt tripper: a device incorporating a system of pulleys that causes the conveyor belt to discharge material at one or more points along the length of the conveyor. boom: a cantilevered member or structure that may be hinged, fixed, or pivoted. brake: a friction device for slowing down conveyor com- ponents, bringing conveyor equipment to a controlled stop, holding traveling or traversing equipment in a selected location, preventing reverse travel, and control- ling overspeed due to the action of gravity. bunker: a large bin or compartment for storage of bulk materials. car unloader: a type of conveyor characterized by a shal- low, horizontal loading section that enables it to receive and unload material from hopper bottom cars without requiring a pit or other excavation. carrier: (a) a device attached to or hung from trolleys to sup- port the load (b) the receptacle inwhichobjects are placed fortrans- mittal through a conveying system (c) the moving partofa vertical or inclined reciprocat- ing conveyor that supports the load chain: a series of links pivotally joined together to form a medium for conveying or transmitting motion or power. General classes of chain common to conveyors are detachable, pintle, combination, roller, rivetless, coil, inverted tooth, and bar link chains. chute: a trough through which bulk materials or objects are directed and lowered by gravity. The trough may be open or enclosed, straight or curved. control: the system governing the starting, stopping, direction of motion, acceleration, speed, retardation, identification, and function of the moving member in a predetermined manner.