ASME HST-6:2020 pdf free download

ASME HST-6:2020 pdf free download.Performance Standard for Air Wire Rope Hoists.
(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 ASMF B30.7)
(h) 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
t’Z.i 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
(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), unless Nonmandatory Appendix A is invoked
(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.
SECTION 6-0.2: DEFINITIONS
abnormal operating conditions: environmental conditions that are unfavorable, harmful, or detrimental to the operation of a hoist, such as excessively high or low ambient 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.
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 fabricated shape on which the trolley operates.
block load: the assembly of hook or shackle, swivel, bearing, pins, sheaves, and frame suspended by the rope. This shall include all appurtenances reeved into the hoisting ropes.
brake: a device, other than a motor, used for retarding or stopping motion by means of friction or power means. 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 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. braking, mechanical: a method of controlling or reducing speed by friction.
ceiling mounted: a type of mounting where the hoist is mounted to the underside of a horizontal supporting surface.
SECTION 6-2.2: OVERLOAD LIMIT DEVICE
(a) An overload limit device, when furnished, shall be designed to permit operation of the hoist within its rated load and to limit the amount of overload that can be lifted by a properly maintained hoist, under normal operating conditions.
(b) The overload limit device may allow the lifting of an overload but shall be designed to prevent the lifting of an overload that could cause damage to a hoist, trolley, or supports. This does not imply that any overload is to be intentionally applied to the hoist.
(c) The overload limit device is an emergency device. It shall not be used to measure the maximum load to be lifted and shall not be used to sense the overload imposed by a constrained load.
SECTION 6-2.3: CONTROL
Hoists and trolleys shall have pendant. pull cord, or rod control. Control actuators shall spring return to the “OFF” position.
6-23.1 Pendant ControL
(a) The pendant control station shall be supported to protect the pneumatic hoses against strain.
(b The pendant control station shall be clearly marked to indicate the function of each actuator.
(c) Unless otherwise specified, the standard pendant control shall have a length that will locate the pendant approximately 3 ft to 5 ft (0.9 m to 1,5 m) above the lower limit of lift.
6-23.2 PuLL ControL
Pull control shall consist of two pull chains or cords with suitable handle(s) clearly marked for direction. Unless otherwise specified, the standard pull control shall have a length that will locate the control handles approximately 3 ft to 5 ft (0.9 m to 1.5 m) above the lower limit of the lift.