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Interlocks safeguard against improper process execution

04 November 2010

The process of loading and unloading pipeline inspection gauge (PIG) launchers and receivers can have catastrophic consequences if performed incorrectly. A specific sequence of valves must be operated, pressurising and depressurising the PIG chamber in the same order every time, to avoid damage to equipment and injury to personnel. To protect this process, Smith Flow Control offers its full line of key interlocks.

Interlocks safeguard against improper process execution
Interlocks safeguard against improper process execution

Smith Flow Control’s interlocks are single or dual-keyed mechanical locking devices used to control the sequence in which process equipment may be operated. Using a ‘key transfer’ principal, operational control over safety-critical processes can be ensured. The use of interlocks is recommended by a number of internationally recognised standards for specific process applications, causing wide acceptance by many of the world’s oil, gas and chemical majors. SFC’s products are used on some of the longest pipelines in the world.

SFC interlocks are constructed of stainless steel and lubricated for life. Each interlock is quickly installed on any standard sized valve or associated equipment with no modifications required. SFC also offers customised solutions to customers with specialised requirements.

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