ASME B30.28-2015 pdf – Balance Lifting Units.
(d) Socketing shall be done in a manner recommended by the rope or fitting manufacturer or a qualified person.
(e) The rope ends shall he attached to the balancer in a manner to prevent disengagement throughout rated hook travel.
f) Eye splices shall be made in a manner as recommended by the balancer manufacturer or qualified person.
28-1.2.4 Load Chain
(a) Load chain shall be pitched (calibrated) so as to pass over all sprockets without binding.
(b) The load chain shall be proof tested by the chain or balancer manufacturer, with a load at least equivalent to 1.5 times the balancer’s rated load divided by the number of chain parts supporting the load.
28-1.2.5 Hooks
(a) Hooks, if used, should be articulating or of the swiveling type at the top support of the balancer.
(b) Hooks used at the bottom of the balancer shall be of the swiveling type and shall rotate freely.
(c) Hooks shall be equipped with latches unless use of the latch creates a hazardous condition. When required, a latch shall be provided to bridge the opening of the hook and retain, under slack conditions, lifting devices such as, but not limited to, slings, chains, and eye pads. Refer to ASME B30.1O, Hooks.
28-1.2.6 Ergonomics
Control panels, manual overrides, component access doors, and covers shall be located to provide suitable access.
28-1.2.7 Lubrication
If lubrication is required, accessible means for lubrication shall be provided and proper instructions documented in the operations manual as to the frequency, type, and location of lubrication to be applied.
28-1.2.8 Controls
(a) Balancers shall have provisions that will prevent uncontrolled upward movement in the event of a loss of load or failure of the lifting medium.
(b) If there are duplicate controls, they should be interlocked and the same operation shall be performed by each set of control function (e.g., up, down, start, close, open).
(c) The control devices shall return to the neutral position when released.
(d) Manual control valves shall be marked to indicate direction or function of operation.
(e) The control station shall be supported in a manner that will protect the power-source conductors against strain.
( Any control station that might present a hazard to the operator if a ground fault occurs shall be grounded.
28-1.2.9 Loss of Power
Interruption of power to balancers shall not cause a hazardous situation such as loss of control, unintended movement, and unintended direction of travel.
28-1.2.10 Manuals
The manufacturer shall furnish a manual with each balancer that shall include information on the following:
(a) hazards
(b) warnings that indicate the consequences of not adhering to the warning and methods to avoid the hazards
(c) installation
(d) operation
(e) inspection
(f) testing
(g) lubrication
(Ii) maintenance
(I) parts
(j) control diagram (may be supplied separately)
28-1.3.1 Procedure
(a) Procedure for balancer installation as recommended by the manufacturer shall be followed.
(b) When balancers are suspended from a trolley, monorail, or bridge and the rated capacity of any of these components is different from that of the balancers, the rated load of the system shall be based on the lowest minimum rated load of any individual component within the system.
28-1.3.2 Support
The supporting structure of the balancers, including trolleys, monorails, crane, or floor supports, shall be designed to withstand the loads and forces imposed by the balancers when operated at their rated load.
28-1.3.3 Location
(a) Balancers shall be installed in locations that will allow sufficient space for the operator to stay clear of the balancer’s load and provide clearances to preclude the operator from being entrapped by the balancer or its load.
(b) Balancers shall not be installed in a hazardous location unless approved by the manufacturer.
28-1.3.4 Installation Inspection
After installation, an inspection shall be made as defined in para. 28-2.1.3.