ASME B30.7:2016 pdf free download.Winches.
(c) Ropes shall be of a length to allow for the entire range of movement specified for the application, with no less than two full wraps of rope on the drum at all times.
(d) The design factor for ropes, except rotation- resistant ropes, shall be not less than 3.5. The design factor for rotation-resistant ropes shall be not less than
5. IDesign factor of 5 or greater for rotation-resistant ropes may be modified by the winch user by complying with the provisions of para. 7-3.2.2(c).1
(e) The design factors shall be determined on the basis of the published minimum breaking force of the rope.
(f) When exposed to temperatures at which fiber cores could be damaged, rope having an independent wire rope or wire-stand (strand) core, or other temperature- damage-resistant core shall be used.
7-1.2.6 Winch ControLs
(a) All controls shall be marked for identification of function and direction of the drum rotation.
(b) All winch controls used during the normal operating conditions shall he located within reach of the operator while at the operator’s station.
(C) Electric motor-driven winches shall be provided with a device that will disconnect all motors from the power source in the event of a power failure and will not permit any motor to be restarted until the controller handle is brought to the off position or a reset switch or button is operated.
(d) Remote-operated winches shall function so that if the control signal for any winch motion becomes ineffective, that winch motion shall stop.
fri All prime mover controls shall return to neutral when released.
7-1.2.7 Control Forces and Movements
When a winch is operated within the manufacturer’s ratings, the following shall apply under normal operation:
(a) forces not greater than 35 lb (156 N) on hand levers and forces not greater than 50 lb (222 N) or less than 8 lb (36 N) on foot pedals
(b) travel distance on hand levers not greater than 14 in. (356 mm) from neutral position on two-way levers, and not greater than 24 in. (610 mm) on one-way levers;
travel distance on foot pedals not greater than 10 in. (254 mm)
7-1.2.8 Engine Clutch
Engine-driven winches shall be provided with a clutch for disengaging power to the winch. The clutch control shall be within reach From the operator’s station.
7-1.2.9 law Clutch
If a jaw clutch is installed, it shall not be possible to disengage the clutch while the winch is under load.
7-1.2.10 Electric Resistors
(a) Resistor units, if used, shall be supported to minimize vibration effect.
(b) Provision shall be made to prevent broken parts or molten metal from falling from the winch.
(c) If resistor enclosures are provided, the enclosures shall be installed to prevent the accumulation of combustible matter.
7-1.2.11 Switches
On electric-powered winches, a circuit switch or circuit breaker of the enclosed type with provisions for locking in the open position shall be provided in the main power supply for the motor. These enclosures shall be suitable for the environment where they are installed.
ASME B30.7:2016 pdf free download
