10 factors that determine a succesful installation of valve interlocks
TRANSCRIPT
Process Interlocking
The #10 factors that determine a succesful installation of valve interlocks
Process Interlocking
#1: Always be prepared to deal with last minute complications such as
> incorrect measurements > last minute change of valve type or gearbox > change of operating sequence of valves
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#2: Train a few specialists or hire a specialist service engineer to supervise, who can
> make small adjustments himself locally > make an inventory of required corrective
actions > make an inventory of required materials > communicate with the engineering team of
the interlock manufacturer effectively
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#3: Train the installation team > basic skills of valve interlock installation > basic understanding of interlock applications
and sequences > on-site trouble shooting of installation issues
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#4: Avoid damage and missing parts during storage
> Store interlock scopes (lock bodies, mounting sets, fitting materials, hand wheels and levers) together in their supplied boxes
> Keep the boxes closed, to avoid unwanted ‘borrowing’ of handwheels or fitting materials during the storage period
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#5: Sorting of materials gains time during installation
> Create workplace near areas of installation > Group all materials per area of installation > Break down the scope into areas/units/skids/
systems > Store returned items in the same place
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#6: Prepare for a safe and efficient installation
> Arrange all documents, including IOM and Lock Order Information Sheet (LOIS)
> Arrange cold work permits and make your task risk analysis
> Check whether the systems in the field are ready for interlock mounting (valves installed, accessible and available, valve types correspond to LOIS?)
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#7: Install strictly according to the operating logic, or ‘sequence’
> Each interlock is unique, has unique key codes and belongs to a dedicated valve tag
> Misplaced interlocks avoid that a system can be properly operated
> Sequences are found in the LOIS, where each interlock tag is linked to the proper valve tag
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#8: Use commissioning keys > With the use of commissioning keys, valve
interlocks can be installed before steam blowing and hydrostatic testing
> This increases the timespan in which interlocks can be installed and reduces the risk of critical delays
> No need for master or spare keys during installation and testing
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#9: Ensure an up-to-date administration > Record the progress of the installation in the
LOIS > Restore uninstalled locks and materials and
register them in the LOIS > Insert the updated LOIS into the MRO
database and share it with your interlock manufacturer for future projects
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#10: Make sure to check detailed information beforehand
> Check out the Support Blog at the Netherlocks website
> Get your own copy of our white paper on succesfully installing valve interlocks