ASME HST-5–2020 pdf download.Performance Standard for Air Chain Hoists.
SECTION 5-0.2: DEFINITIONS abnormaloperating conditions: environmental conditions thatare unfavorable, harmful, or detrimental to the operation ofa hoist, such as excessively high or low 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. beam: an overhead standard structural or specially fabricated shape on which the trolley operates. brake: a device, other than a motor, used for retarding or stopping motion by means of friction or power. 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 ofcontrolling speed by removingenergy 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. chain, hand: the chain provided to control movement of a hand chain-operated trolley. chain, load: the load-bearing chain in the hoist. chain, roller:aseriesofalternatelyassembledrollerlinksandpinlinksinwhichpinsarticulateinsidethebushingsandthe rollers are free to turn on the bushings. Pins and bushings are press-fit in their respective link plates. chain, welded link: a chain consisting of a series of interwoven links formed and welded. NOTE: Load chain properties do not conform to those shown in ASME B30.9. control: a device or group ofdevices that serves to govern in some predetermined manner the power delivered to the apparatus to which it is connected.
SECTION 5-0.3: REFERENCES The following is a list of publications referenced in this Standard. The latest edition shall apply. ANSI/NFPA 70, National Electrical Code Publisher: National Fire Protection Association (NFPA), 1 Batterymarch Park, Quincy, MA 02169-7471 (www.nfpa.org) ASME B30.9, Slings ASME B30.16, Overhead Underhung and Stationary Hoists Publisher: The American Society of Mechanical Engineers (ASME), Two Park Avenue, New York, NY 10016-5990 (www.asme.org)
SECTION 5-0.4: APPENDICES NonmandatoryAppendixAapplies to the performance requirements forhoists used in marine and other applications. The requirements stated in Nonmandatory Appendix A are in addition to the requirements ofASME HST-5 and shall be specifically invoked.ASME HST-5 pdf download.