ASME HST-5:2020 pdf free download – Performance Standard for Air Chain Hoists
abnormal operating conditions: environmental conditions that are unfavorable, harmful, or detrimental to the operationof a hoist, such as excessively high or low temperatures, exposure to weather,corrosive fumes, dust-laden or moisture-laden atmospheres, and hazardous locations.
ambient temperature: the temperature of the atmosphere surrounding the hoist.
beam: an overhead standard structural or specially fabricated shape on which the trolley operates.
brake: a device, other than a motor,used for retarding or stopping motion by means of friction or power.
brake, holding: a friction brake for a hoist that is automatically applied and prevents motion when the air supply isinterrupted.
brake, mechanical load: an automatic type of friction brake used for controlling loads in a lowering direction. Thisunidirectional device requires torque from the motor to lower a load but does not impose additional load on themotor when lifting a load.This may also be used as a holding brake if designed as such by the manufacturer.
braking, control: a method of controlling speed by removing energy from the moving body or by imparting energy in theopposite direction.
braking, dynamic: a method of controlling speed by using the motor as a compressor.chain, hand: the chain provided to control movement of a hand chain-operated trolley.chain, load: the load-bearing chain in the hoist.
chain,roller: a series ofalternately assembled roller links and pin links in which pins articulate inside the bushings and therollers are free to turn on the bushings. Pins and bushings are press-fit in their respective link plates.
chain, welded link: a chain consisting of a series of interwoven links formed and welded.
NOTE: Load chain properties do not conform to those shown in ASME B30.9.
control: a device or group of devices that serves to govern in some predetermined manner the power delivered to theapparatus to which it is connected.
control, pendant: a valve system, connected to the hoist or trolley by hoses, that either directly controls flow of air to themotor or controls a pilot-operated valve system at the motor inlet.
control,pull cords or chains suspended from the hoist, by means of which a valve system on the hoist can be operated.control, rod: a rigid rod suspended from the hoist, with which a valve system on the hoist can be operated.
hazardous (classified) locations:locations where fire or explosion hazards may exist. Locations are classified dependingon the properties of the flammable vapors, liquids, or gases, or combustible dusts or fibers that may be present, and thelikelihood that a flammable or combustible concentration or quantity is present. Refer to ANSI/NFPA 70.
lifting devices, below-the-hook: devices that are not normally reeved onto the hoist chains such as hook-on-buckets,magnets, grabs, and other supplemental devices used for handling certain types of loads. The weight of thesedevices is to be considered part of the load to be lifted.
limit device: a device that limits equipment motion or takes control of particular functions without action of the operatorwhen a limiting condition is reached.
load, rated: the maximum load for which a hoist or trolley is designated by the manufacturer or qualfied person.load, working: the external load applied to the hoist, including the weight of load-attaching equipment such as shacklesand slings.