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DOE-STD-1090-96, DOE Standard Hoisting and Rigging Manual ...

DOE-STD-1090-96, DOE Standard Hoisting and Rigging Manual ...

DOE-STD-1090-96, DOE Standard Hoisting and Rigging Manual ...

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<strong>DOE</strong>-<strong>STD</strong>-I090-<strong>96</strong> (Rev-I)14.4 MAGNETS, CLOSE-PROXIMITY-OPERATEDClose-proximity-operated magnetic lifting devicesare used for single- or multiple-steel-pieceh<strong>and</strong>ling operations in which the operator ofthemagnet is required to manually guide the loadduring its movement They are also used insituations where remotely operated magnets areoperated close to people. Typicalclose-proximity-operated magnetic lifting devicesare shown inFigure 14-7.14.4.1 Design/FabricationClose-proximity-operated magnetic lifting devicesshall be designed <strong>and</strong> fabricated in accordancewith the provisions ofASME B30.20, 20-3.2.2<strong>and</strong> 20-3.2.3.14.4.2 Markinga. At a minimum, a nameplate, name tag, orother permanent marker shall be affIXed to eachlifting magnet, <strong>and</strong> shall display the followingdata:1. Manufacturer's name, or ifthe magnethas been repaired or modified, the name <strong>and</strong>address ofthe repairer/modifier.2. Model or unit identification.3. Weight.4. Duty cycle, ifapplicable.5. Cold current6. Rated capacity.b. Also, battery-powered <strong>and</strong> external-poweredlifting electromagnets <strong>and</strong> electrically controlledpermanent-magnet lifting magnets shall bemarked with:1. The voltage ofthe battery or primarypower supply.2. The cold current or watts at 68 degreesF (20 degrees C) <strong>and</strong> rated voltage.c. Cases may exist where a lifting devicecannot be marked with its rated capacity <strong>and</strong>weight. This may be due to the securityclassification ofthe load to be lifted or otherreasons approved by the responsible manager. Inthese cases, the lifting device shall be marked withan identification number, <strong>and</strong> its documentationshall contain both its rated capacity <strong>and</strong> weight.d. A label or labels shall be affixed to eachlifting magnet in a readable position that displaysthe word "CAUTION" or other legend designed tobring the label to the attention ofthe operator.The label shall also contain informationcautioning against:1. Operating when the battery capacity isinadequate.2. Exceeding magnet duty cycle <strong>and</strong>disconnecting the magnet with the power on (forexternally powered electromagnets).3. Operating ifthe internal controlfunction indicator, where applicable, does notindicate a complete cycle (on electricallycontrolled permanent magnets).4. Operating with the control h<strong>and</strong>le notfully in the "Lift" position (on manually controlledpermanent magnets).14.4.2.1 Rated load (Capacity)a. General-application magnets shall includethe rated load (capacity) ofthe magnet on thelifting magnet or on a tag attached to it Thiscapacity rating shall refer to the instructionmanual for information relating to decreases inrating due to the load surface condition, thickness,percentage ofcontact with magnet, temperature,metallurgical composition, <strong>and</strong> deflection.b. Specified-application magnets shall includethe application load (capacity) ofthe magnet onthe lifting magnet or on a tag attached to it. Thiscapacity rating shall refer to the specific loads forwhich it applies.14.4.2.2 ControlsThe position ofthe control switch or h<strong>and</strong>le ofalifting magnet shall be marked with "Lift," "Off,"<strong>and</strong> "Drop," or equivalent terms indicating themode ofoperation ofthe lifting magnet.14.4.3 Installationa. Close-proxirnity-operated magnetic liftingdevices shall be installed according to themanufacturer's recommendations.b. Users shall ensure that:Chapter 14Below-the-Hook Lifting Devices 14-12

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