Pig passage indicators are commonly referred to as “PIG-SIGs,” a term TDW originated more than 60 years ago. They accurately detect pigs, spheres, scrapers, and other tools as they pass distinct points along the pipeline and when they reach the receiver, and can also alert operators if a pig is lost or stuck.
The weatherproof and corrosion-resistant PIG-SIG® V pig passage indicator is built to withstand the most brutal environments, both onshore and topside. In addition, all components exposed to pipeline products are completely sealed to prevent leaks.
PIG-SIG® V
- Easy to install and maintain
- An omnidirectional trigger inserted into the pipeline through a welded fitting trips when a pig or tool passes by
- The flag indicator can be oriented in any direction
- Optional electrical switch can connect to your supervisory control and data acquisition (SCADA) system. This allows passage time to be recorded in conjunction with other activities monitored on the pipeline system, such as closing and opening valves
- Extended models for installation on buried pipelines are available in all indicator configurations