ASME HST-6−2015 pdf download.Performance Standard for Air Wire Rope Hoists.
SECTION 6-0.1 SCOPE (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.
SECTION 6-2.1 ROPE SHEAVES (a) The pitch diameter of running sheaves should not be less than 16 times the rope diameter. (b) The pitch diameter of nonrunning sheaves should not be less than 12 times the rope diameter.
SECTION 6-2.2 DRUM (a) The pitch diameter of the drum should not be less than 18 times the diameter of the rope used. (b) No less than two wraps of rope shall remain on each anchorage of the hoist drum when the hook is at its lowerlimitoftravel as determined byratedlift, unless a lower limit device is provided, in which case no less than one wrap shall remain on each anchorage of the hoist drum.
SECTION 6-2.3 REEVING Hoist reeving may be either single or double, and may be one part or multiple part. 6-2.3.1 Single Reeving On single-reeved hoists, one end of the rope is attached to the drum. Continuous drum grooving runs in one direction. The load block moves laterally in the direction of the axis of the drum as the rope winds onto or off of the drum. [See Fig. 6-0.2-2, illustration (a).] 6-2.3.2 Double Reeving On double-reeved hoists, both ends of the rope are attached to the drum. The drum is grooved with left- and right-hand grooves beginning at both ends of the drum, then grooving toward the center of the drum. The load block follows a true vertical lift (true vertical path) as the ropes wind toward or away from each other onto or off of the drum. [See Fig. 6-0.2-2, illustration (b).]ASME HST-6 pdf download.