ASME HST-5-2020 pdf download
ASME HST-5-2020 pdf download.Performance Standard for Air Chain Hoists.
This Standard establishes performance requirements for air-powered chain hoists for vertical lifting service in- volving material handling of freely suspended (unguided) loads using load chain of the roller or welded link types with one of the following types of suspension: (1) lug (2) hook or clevis (3) trolley (b) This Standard is applicable to hoists manufactured after the date on which this Standard is issued. It is not ap- plicable to (1]) damaged or malfunctioning hoists (2) hoists that have been misused or abused (3) hoists that have been altered without authorization of the manufacturer or a qualified person (4) hoists used for lifting or supporting people, or (5) hoists used for the purpose of drawing both the load and the hoist up or down the hoist’s own load chain[s) The requirements of this Standard shall be applied together with the requirements of ASME B30.16. Please also referto ASME B30.16 for requirements pertaining to marking, construction, and installation; inspection, testing, and mainte- nance; and operation. 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 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 is interrupted.
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 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 is 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 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 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 of alternately 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 B30.9. The hoist can be connected to the trolley by hook, clevis, or lug suspension, or the hoist can be integral with the trolley.
