ASME B30.20-2006 pdf download
ASME B30.20-2006 pdf download.Below-the-Hook Lifting Devices.
force, breakaway: the force that must be applied to a lifting magnet to remove it from a piece of ferromagnetic material to which it is magnetically attached.
indicator, internal control function: an indicator which shows that the permanent magnet material in one type of electrically controlled permanent magnet has been positioned internally to provide full magnetic attraction.
load (capacity), rated: the maximum load that the lifting magnet is designated to handle by the manufacturer.
load (capacity), specified application: a load applied to the lifting magnet when it is used to handle a specified load.
load (maximum), specified: a load identified by a part number or other controlled definition.
magnet, lifting:
electromagnet, battery-powered: a lifting magnet that requires continuous current supplied by a battery to maintain holding force (see Fig. 7, sketch (a)].
electromagnet, externally powered: a lifting magnet suspended from a crane that requires power from a source external to the crane.
permanent magnet, electrically controlled: a lifting magnet that derives holding force from permanent magnet material and requires current only during the period of attachment or release [see Fig. 7, sketch (b)J.
perimianent magnet, manually cont rolled: a lifting magnet that derives holding force from permanent magnet material and requires a manual effort during period of attachment or release [see Fig. 7, sketch (c)].
mnagmiet, lifting, close proximity operated: a lifting magnet used in such a fashion that the operator manually positions the lifting magnet on the load, and manually guides the lifting magnet and load during a lift.
magnet, lifting, general application: lifting magnets that are intended by the manufacturer to be used on a number of different geometrical shapes and do not fall under the category of remotely operated lifting magnets.
magnet, lifting, remnotL’ly operated: a lifting magnet that does not require the operator or other personnel to be in close proximity to the lifting magnet or its load while the lifting magnet is in use.
magnet, lifting, specified application: lifting magnets that are designed for lifting specified geometrical configurations and weights of designated parts, identified by part number or other controlled definition and used in a controlled manner.
service, heavy duty: that service which involves operation within the rated load limit that exceeds normal service.
service, normal: rated load (capacity) at 50% duty cycle over one shift (8 hr).
load (capacity), rated: the maximum load that the lifting magnet is designated to handle by the manufacturer.
uzagnet, lifting, close proxmufy operated: a lifting magnet used in such a fashion that the operator manually positions the lifting magnet on the load, and manually guides the lifting magnet and load during a lift.
magnet, lifting, remotely operated: a lifting magnet that
does not require the operator or other personnel to be in close proximity to the lifting magnet or its load while the lifting magnet is in use Isee Fig. 7, sketches (d) and (e)J.
magnet, lifting, submersible: a special lifting magnet that has been designed to be immersed in liquid.
service, heavy duty: that service which involves operation within the rated load limit that exceeds normal service. service, normal: rated load (capacity) at 50% duty cycle over one shift (8 hr).
service, severe: that service which involves normal or heavy service with abnormal operating conditions.
SECTION 20-0.7: DEFINITIONS FOR CHAPTER 20-5
rated capacity: the volume of scrap/material that can be handled with the grapple closed and the tine tips touching. This is to be expressed in cubic yards or cubic meters.
scrap and material handling grapples: various types of scrap and material handling grapples are shown in Fig. 8.
fine: the hinged portion of the grapple that comes in contact with or encompasses the load.
