TPI July 2013

products & developments

Key interlocks for PIG launchers and receivers 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 (SFC) offers a full line of key interlocks.

Interlocks from Smith Flow Control

The 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

any standard sized valve or associated equipment, with no modifications required. SFC also offers customised solutions to customers with specialised requirements.

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 that contain pig traps. SFC interlocks are constructed of stainless steel and lubricated for life. Each interlock is quickly installed on

Smith Flow Control Ltd – UK sales@smithflowcontrol.com www.smithflowcontrol.com

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July 2013 Tube Products International