1600 interlocks

Safety interlocking devices from
Netherlocks B.V. have been
successfully installed at the Shell
Eastern Petroleum (SEPL) Ethylene
Cracker Complex in Pular Ular,
Singapore. The main applications for
the 1600 interlocks are for the
decoking process, and on isolation
valves for PSVs (pressure safety
valves).

Netherlocks’ interlocks use a
linear key transfer system to ensure
that processes can only be carried
out in the correct order, ensuring
each part has been safely completed
before the next is started. Safely
completing the previous step in the
process sequence will release a
unique key that then unlocks the
next step; only when a mistake is
made will the operator be prevented
from proceeding by a key that
doesn’t fit or a valve locked in
position.