Forced lockout


To ensure the safety of people working in high risk areas where a simple error or omission can be fatal. Despite the steps and rigorous procedures extensively planned beforehand, it is impossible to ensure that a lockout procedure will be respected in every details. This explains the situation where, it is unclear why, a machine was not locked-out properly and results in an incident. Because affixing a padlock remains a voluntary action.

Obviously, lockout procedures can be circumvented intentionally, or just omitted or forgotten. The lock can be removed prematurely even before the repairs on the equipment are over! But not in the case of 'forced lockout!

What is 'forced lockout'? It is a combination of interlock systems (or mechanisms) and trapped keys (like KIRK INTERLOCK, RONIS or other) permanently attached to the locking point on the equipment (electrical breaker, on/off switch). The trapped keys are removed one by one and are directed to a key transfer block. In other words, the key that you insert into a lock is only used to remove another and, from there, you get the combination of keys which will force you to comply with the procedure established to protect the working area. Hence the term "forced lockout"!

Here is an example of interlocking with KIRK INTERLOCK type locks:


KIRK_11) To be able to work on the piece of equipment, the worker must first close the valve of a toxic gas. It was necessary to machine parts directly attached to equipment and change the handle on the valve so that it does not lock in closed position (it will lock only in open position). Once the valve is locked, it releases the key that was previously stuck in the lock.

 (Clic on the picture for more details)







Picture_0092) The released key will permit to lock a disconnector nearby only at the OFF position. Once locked, a second key via the transfer box will be released and will unlock access to the piece of equipment.










KIRK__5_3) The key unlocks the access to the equipment via a pedestrian gate or door. Only when the worker has completed his task, the key will be released from the lock to activate the disconnector again, and thereafter the valve. He can work without worries of being poisonned or electrocuted.