ASME HST-5 pdf free download

ASME HST-5-2020 pdf free download.Performance Standard for Air Chain Hoists.
SECTION 5-0.2: DEFINITIONS
abnormal operating conditions: environmental conditions that are unfavorable, harmful, or detrimental to the operation
of a hoist, such as excessively high or low temperatures, exposure to weather, corrosive fumes, dust-laden or moistureLiden 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 is
interrupted.
brake, mechanical load: an automatic type of friction brake used for controlling loads in a lowering direction. This unidirectional device requires torque from the motor to lower a load but does not impose additional load on the motor when lifting a load. This may also he 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 the opposite 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 the
rollers 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 830.9.
control: a device or group of devices that serves to govern in some predetermined manner the power delivered to the apparatus 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 the motor 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 depending on the properties of the flammable vapors, liquids, or gases, or combustible dusts or fibers that may be present, and the likelihood that a flammable or combustible concentration or quantity is present. Refer to ANSI/NFPA 70. headroom: headroom is measured with the load hook at its upper limit of travel and is the distance from the saddle of the load hook to the following locations (see Figure 5.0.2-1):
(a) saddle of the top hook on hook-suspended hoists
(Ii) centerline of the suspension holes on lug-suspended hoists
(cJ wheel treadline on trolley-suspended hoists
hoist: a machinery unit that is used for lifting or lowering a freely suspended (unguided) load. hoist speed: the rate of motion that the load hook obtains while lifting rated load.
hook suspended: suspension of the hoist from a trolley or rigid structure by means of a hook at top of hoist.
idler sprocket: a freely rotating device that changes the direction of the load chain. This device is sometimes called idler wheel, idler sheave, pocket wheel, or chain wheel (see Figure 5.0.2-2).
lift: the maximum vertical distance through which the load hook can travel and is the total hook movement between its upper limit of travel and its position when at the lower limit of travel (see Figure 5-0.2-1).
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 these devices 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 operator when a limiting condition Is reached.
load, rated: the maximum load for which a hoist or trolley is designated by the manufacturer or qualified person. load, working: the external load applied to the hoist, including the weight of load-attaching equipment such as shackles and slings.
load block: the assembly of hook or shackle, swivel, bearing, pins, sprocket, and frame suspended by the load chain. This shall Include all appurtenances reeved in the load chain.
load chain container: a device used to collect the slack load chain. load hook: the hook used to connect the load to the hoist.
load sprocket: a hoist component that transmits motion to the load chain. This component is sometimes called load wheel. load sheave, pocket wheel, chain wheel, or lift wheel (see Figure 5-0.2-2).
load suspension parts: the means of suspension (hook or lug): the structure or housing that supports the load sprocket. load chain, sprockets, and load block or hook.
lug suspended: suspension of the hoist from a trolley or permanent structure by means of a bolt(s) or pin(s) through a rigid-type or swivel-type lug.
minimum radius: the smallest radius of the beam, measured to the center line of the web of the beam, on which the trolley will operate.
normal operating conditions: conditions during which a hoist is performing functions within the scope of the original design.
overload: any load greater than the rated load.ASME HST-5 pdf download.