ASME HST-6:2015 pdf download

ASME HST-6:2015 pdf download.Performance Standard for Air Wire Rope Hoists
(a) This Standard establishes performance require- ments for air wire rope hoists for vertical lifting service involving material handling of freely suspended (unguided) loads using wire rope as the lifting medium with one of the following types of suspension: (1) lug (2) hook or clevis (3) trolley (4) base or deck mounted (does not include winches of the type covered by ASME B30.7) (5) wall or ceiling mounted (does not include winches of the type covered by ASME B30.7) (b) This Standard is applicable to hoists manufactured after the date on which this Standard is issued. It is not applicable to the following: (1) damaged or malfunctioning hoists (2) hoists that have been misused or abused (3) hoists that have been altered without authoriza- tion of the manufacturer or a qualified person (4) hoists used for lifting or supporting people (5) hoists used for the purpose of drawing both the load and the hoist up or down the hoist’s own wire rope (6) hoists used for marine and other applications as required by the U.S. Department of Defense (DOD) (c) The requirements of this Standard shall be applied together with the requirements of ASME B30.16. Please also refer to ASME B30.16 for requirements pertaining to marking, construction, and installation; inspection, testing, and maintenance; and operations.
abnormal operating conditions: environmental conditions thatare unfavorable, harmful, or detrimental to the oper- ation of a hoist, such as excessively high or low ambient temperatures, exposure to weather, corrosive fumes, dust-laden or moisture-laden atmospheres, and hazard- ous locations. ambient temperature: the temperature of the atmosphere surrounding the hoist.base or deck mounted: a type of mounting where the hoist is mounted to the top side of a horizontal supporting surface. beam: an overhead standard structural or specially fabri- cated shape on which the trolley operates. brake: a device, other than a motor, used for retarding or stopping hoist or trolley motion by friction or power means. brake, holding: a friction brake for a hoist that is automati- cally 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. ceiling mounted: a type of mounting where the hoist is mounted to the underside of a horizontal supporting surface. chain, hand: the chain provided to control movement of a hand-chain-operated trolley. control actuator: a manual means at the operator station by which hoist or trolley controls are energized. control braking means: 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.hazardous (classified) locations: locations where fire or explosion hazards may exist. Locations are classified depending on the properties of the flammable vapors, liquids, gases, or combustible dusts or fibers that may be present, and the likelihood that a flammable or com- bustible concentration or quantity is present (refer to NFPA 70). Class 1 locations: locations in which flammable gases or vapors are or may be present in the air in quantities sufficient to produce explosive or ignitable mixtures. Class 2 locations: locations that are hazardous because of the presence of combustible dust. Class 3 locations: locations that are hazardous because of the presence of easily ignitable fibers or flyings, but in which such fibers or flyings are not likely to be in suspension in the air in quantities sufficient to produce ignitable mixtures. headroom: measured with the load hook at its upper limit of travel, headroom is the distance from the saddle of the load hookto the following locations (see Fig. 6-0.2-1): (a) centerline of the suspension holes on lug- suspended hoists (b) saddle of the top hook on hook-suspended hoists (c) wheel treadline on trolley-suspended hoists (d) supporting surface on base-, deck-, and ceiling- mounted hoists (e) uppermost point of hoist on wall- and ceiling- mounted hoists