ASME HST-2 pdf download

ASME HST-2 pdf download

ASME HST-2 pdf download Performance Standard for Hand Chain Manually Operated Chain Hoists
(a) This Standard establishes performance requirements for hand chain manually operated chain hoists for verticalifting service involving material handling of freely suspended (unguided) loads, using welded link type load chain as alifting medium, with one of the following types of suspension:
(1) hook or clevis
(2) trolley
(b) This Standard is applicable to hoists manufactured after the date on which this Standard is issued. Differentialpulley and self-locking worm drive type hoists are not covered in this Standard.(c) This Standard is not applicable 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
(5) hoists used for the purpose of drawing both the load and the hoist up or down the hoist’s own load chain(6) hoists used in applications where the load on the hand chain hoist is not freely suspended from the hand chain
hoistT’he requirements ofthis Standard shall be applied together with the requirements ofASME B30.16. Please also refer toASME B30.16 for requirements pertaining to marking, construction, installation, inspection, testing maintenance, andoperation.
ambient temperature: the temperature of the atmosphere surrounding the hoist.beam: an overhead standard structural shape or specially fabricated shape on which a trolley operates.chain, hand: the chain provided to control movement of a hand-chain-operated hoist or trolley (see Figure 2-0.2-1)NOTE: Hand chain and load chain properties do not conform to those shown in ASME B30.9.
chain, load: the load-bearing chain in the hoist.
NOTE: Hand chain and load chain properties do not conform to those shown in ASME B30.9
conditions, abnormal operating: environmental conditions that are unfavorable, harmful, or detrimental to or for theoperation of a hoist, such as excessively high or low ambient temperatures, exposure to weather, corrosive fumes, dustladen or moisture-laden atmospheres, and hazardous locations.
conditions, normal operating: conditions during which a hoist is performing functions within the scope of the originaldesign.
hand chain drop:the distance to the lowest point of the hand chain measured from the saddle ofthe load hook at its upper
limit of travel (see Figure 2-0.2-1).hand chain overhaul: the number of feet (meters) the hand chain must travel to raise the load hook 1 ft (1 m).hand chain pull: the average force measured in pounds (kilonewtons) exerted by the operator on the hoist hand chain to
lift the rated load.hand chain wheel: a whee with formed pockets on its periphery to allow torque to be transmitted when a force is appliecto the hand chain.

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