ASME B30.7:2016 pdf download

ASME B30.7:2016 pdf download.Winches
The B30.7 Volume includes provisions that apply to the construction, installation, operation, inspection, test- ing, and maintenance ofwinches arranged for mounting on a foundation or other supporting structure for mov- ing loads. Winches addressed in this Volume are those typically used in industrial, construction, and maritime applications. The requirements included in this Volume apply to winches that are powered by internal combus- tion engines, electric motors, compressed air, or hydrau- lics, and that utilize drums and rope. This Volume does not apply to overhead hoists, mine hoists, capstans, or winches installed as an integral part of the lifting system of other B30 equipment. Also excluded are winches used with (a) all-terrain-type recreational vehicles (b) drill rig relocation trucks (c) tow trucks (d) vehicle recovery units (e) boat trailers (f) amusement park rides (g) excavating equipment (h) equipment covered by ANSI A10, A17, A90, A92, A120, B20, B56, and B77 standards (i) free-fall applications such as pile driving Provisions of this Volume do not apply to the move- ment of personnel.
administrative or regulatory authority: governmental agency, or the employer in the absence of governmental jurisdiction. brake: a device used for retarding or stopping motion. capstan (winch head): a rotatable cylindrical drum with curved end flanges used for load handling by means of fiber rope or wire rope with hand tension applied to the free end of the fiber or the wire rope. A capstan may be a stand-alone machine or may be installed as an auxiliary device on a winch (see Fig. 7-0.2-1).clutch: a means for engagement or disengagement of power. critical lift: a load handlingoperationthathas been deter- mined to present an increased risk beyond normal load handling activities. For example, increased risk may relate to personnel injury, damage to property, interrup- tion of plant production, delays in schedule, release of hazards to the environment, or other jobsite factors. drum: the cylindrical member around which rope is wound for moving the load. exposed: describes hazards not guarded or isolated (capa- ble of being contacted inadvertently). final stage manufacturer: an entity that assembles, installs, or permanently affixes a winch to complete a load move- ment system. jaw clutch: a clutch composed of two hubs with jaws that engage each other. This type of clutch is either engaged or disengaged and cannot slip. lifting/lowering: vertical movement of a freely suspended load by a winch. limit device: a device that is activated by some part or motion of a winch to stop drum rotation. minimum breaking force: the minimum load at which a new and unused wire rope will break when loaded to destruction in tension. operating conditions, normal: conditions during which a winch is performing functions within the scope of its original design. pawl (dog): a device for positively holding machinery against undesired motion. qualified person: a person who, by possession of a recog- nized degree in an applicable field or certificate of pro- fessional standing, or who, by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work.rope: refers to wire rope unless otherwise specified. rotation-resistant rope: a wire rope consisting of an inner layer of strands laid in one direction covered by a layer of strands laid in the opposite direction; this has the effect of counteracting torque by reducing the tendency of the finished rope to rotate. service, heavy: service that involves operation within the rated load limit but that exceeds normal service. service, normal: distributed service that involves opera- tion with randomly distributed loads within the rated load limit, or uniform loads less than 65% of rated load for not more than 25% of the time. service, severe: service that involves normal or heavy ser- vice with abnormal conditions. shall: a word indicating a requirement. should: a word indicating a recommendation. spooling: winding ofrope on a cylindrical drum in evenly spaced wraps and uniform layers.