Selection of isolation devices

The following shall be considered in the selection of the isolation device:

-- special dangerous energy isolation device to meet special needs;

-- technical requirements for installing locking devices;

-- buttons, selection switches and other control line devices shall not be used as dangerous energy isolation devices;

-- control valve and solenoid valve cannot be used as separate material isolation device; If the control valve and solenoid valve must be used for isolation, special operating procedures shall be formulated in accordance with Q/ sy1243-2009 to ensure safety isolation;