ASME HST-3:2017 pdf free download

ASME HST-3:2017 pdf free download.Performance Standard for Lever Hoists.
SECTION 3-1.1 GENERAL
All equiprnentselected in accordance with this Standard shall perform satisfactorily when used In accordance with ASME B30.21, Chapters 21-2 through 21-4 and used within the rated load.
All equipment shall provide for operating lever pull, lift, and headroom in accordance with the manufacturer’s specifications or the specifications agreed upon by the manufacturer and user.
SECTION 3-1.2 APPLICATION
Lever hoists shall be suitable for lifting or lowering, pulling or tensioning loads within their rated load. They shall be capable of being used in pulling or tensioning applIcations at any angle, provided the load block, lifting medium, and hoist body are not restricted from forming a straight line with the direction of loading.
The hoists covered by this Standard are intended for industrial use In ambient temperatures from 0°F to 130°F (—18°C to 54°C) and should perform satisfactorily when applied and operated In the manner described in this Standard, The user should consult with the manufacturer for lever hoists to be used in hazardous (classified) locations or under abnormal operating conditions. Refer to ASM E B30.2 1 for construction. installation, inspection, testing, operation, and maintenance.
Because of varying environmental conditions, loading, and usage, the hoist service life is interrelated to the type and frequency of maintenance performed on the unit.
Equipment covered by this Standard should be inspected and maintained according to ASME 1330.21. Chapter 2 1-4.
SECTION 3-1.3 OPERATING CHARACTERISTICS
Lever hoists shall be constructed to provide the following operating characteristics:
(a) The hoist shall lift, lower, or pull a load, and apply or release tension in controlled increments when a manual force is applied to the operating lever (handle).
(b) The hoist shall lift or pull the rated load when an appropriate lever pull is exerted by one operator (see section 3-1.4).
(c) The hoist shall be equipped with a mechanism (friction brake or ratchet-and-pawl) that shall hold and control loads within the rated load when the hoist is being operated In either direction.
(d) The hoist shall be equipped with accessible operating controls.
(e) The hoist should have a free-wheeling capability that will allow the operator to adjust the load hook position when the unit is not under load.
SECTION 3-1.4 PERFORMANCE
CHARACTERISTICS
See Tables 3-1.4-1, 3-1.4-2, 3-1.4-3, and 3-1.4-4 for generally available lever hoist capacities and typical performance characteristics.