ASME HST-2 pdf download

ASME HST-2 pdf download.Performance Standard for Hand Chain Manually Operated Chain Hoists.
(a) ASME HST-2 establishes performance requirements for hand chain manually operated chain hoists for vertical lifting service involving material handling of freely suspended (unguided) loads, using welded link type load chain as a lifting 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. Differential pulley 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 hoist
The requirements of this Standard shall be applied together with the requirements of ASM E B30. 16. Please also refer to ASME B30.16 for requirements pertaining to marking, construction, installation, inspection, testing, maintenance, and operation.
SECTION 2-0.2: DEFINITIONS
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 R30.9.
conditions, abnormal operating: environmental conditions that are unfavorable, harmful, or detrimental to or for 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.
conditions, normal operating: conditions during which a hoist is performing functions within the scope of the original design.
hand chain drop: the distance to the lowest point of the hand chain measured from the saddle of the 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 wheel with formed pockets on its periphery to allow torque to be transmitted when a force is applied to the hand chain.
This Appendix provides performance requirements beyond those cited in ASME HST-2—2018 for hand operated chain hoists for use in marine and other applications as required by the Department of Defense (DoD).
This Appendix. In conjunction with ASME HST-2—2018, Is replacing the requirements ofMlL-H-904 for hand operated chain hoists.
A-1.2 CLassification
Hand chain manually operated chain hoists shall be of the following classes and types Isee pat-a. A-5.1(b)J.
A-1.2J. CLasses
Class 1 Conventional weight, for general material handling
Class 2 Light weight, for general material handling
Class 3 Free of cast Iron load-bearing parts, used for special purpose service (such as reactor component handling)
A-1.22 Types
Type A Hand-chain-operated hoist, link chain, hook suspension
Type B Hand-chain-operated hoist, link chain, plain trolley suspension
Type C Hand-chain-operated hoist, link chain, geared trolley suspension
Type D Hand-chain-operated hoist, link chain, low headroom, plain trolley suspension
Type E Hand-chain-operated hoist, link chain, low headroom, geared trolley suspension
A-13 Definitions
brittle material: material showing less than 10% elongation in gage length for the tensile test specimen. operating cycle: the lifting and lowering of the hoist rated load through a minimum distance of 4 if, with a 6-sec maximum pause between lift and lowering.
recovered materials: materials that have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials.
A-1.4 References to Other Codes and Standards
Refer to the following publications, copies of which may be obtained from the publisher as indicated. The edition bearing the latest date of issuance shall be used.
ASTM A48, Standard Specification for Gray Iron Castings (DoD adopted).