pig signaller non intrusive type

Pig Signaller

Once a pig has been inserted into a pipe system, its position cannot be visually confirmed directly. A system is therefore required to indicate a pig’s position continuously or intermittently at pre-determined points in the pipeline. Continuous detection is called pig tracking, while intermittent detection is called pig signalling. Each method involves the use of specialized equipment, which, in most instances, must be incorporated into the pig or piping system before the pig is launched.

Pig tracking requires an active transmitting source to be attached to the pig, with various technologies being used to provide that source – electromagnetic, acoustic and radioactive. Pig signalling, however, falls into two categories: intrusive and non-intrusive. Non-intrusive signallers are predominantly electromagnetic and, along with pig tracking techniques, are covered more fully elsewhere. Pipeline Engineering has applied its case experience to produce a wide range of intrusive pig signallers.

Pig Signaller non intrusive Advantages:

1. Simple Installation: Pig signallers that don’t require wall penetration or other modifications can be put outside on pipelines. This shortens the installation procedure and requires less time and work. It enables more rapid deployment and lessens interference with pipeline operations.

2.  Convenient maintenance: They are typically simpler to maintain since they don’t require pipeline tapping or potential leak problems. The pipeline may see less downtime and fewer maintenance expenses as a result. Cleaning and calibration procedures can be performed routinely without affecting the pipeline’s flow.

3.    Versatility: Non-intrusive pig signallers are a versatile solution because they may be used with both new and old pipelines. They don’t require significant modification to be retrofitted onto already-built pipelines. Because of its versatility, pipeline systems across different industries can use it more widely.

Pig Signaller non intrusive Disadvantages:

1.    Signal Sensitivity: The non-intrusive signaller relies on the disruption of the magnetic field to identify pigs, which may be less sensitive than devices that make direct contact. This can sometimes result in false negatives or missing pig detections. The sensitivity settings and calibration must be carefully considered to guarantee precise pig
detection.

2.   Limitations with Non-Magnetic Pigs: The detection of pigs that affect non-magnetic or low-magnetic fields may not be possible with non-intrusive signallers. This limits their use when working with particular pig types or materials. Before choosing a non-intrusive pig signaller, it is advisable to ensure it is compatible with the type of pig being utilized.

3.    External Factor: The precision and dependability of the signal may be impacted by environmental factors such as the electromagnetic interference present nearby or the composition of the soil. This necessitates carefully taking into account the operational environment and any interference sources. Techniques like shielding or signal filtering may be required to reduce external variables that can degrade signal quality.

Intrusive Pig Signaller: Advantages

1.    Detecting pigs accurately: intrusive Pig signallers immediately communicate with the animal, resulting in more accurate identification and successful confirmation of pig passage. This guarantees precise pig tracking throughout the pipeline system. It makes it possible to pinpoint the pig’s position and movement along the pipeline.

2. Suitable for Different Types of Pigs: Pigs that are non-magnetic or have modest magnetic field disturbance can also be detected with intrusive signallers. Thanks to their adaptability, they can be employed in a greater variety of pigging operations. The application of intrusive pig signallers is improved by compatibility with several pig types.

3. Technology with a long history: In pipeline pigging applications, intrusive pig signallers have a long history of use and success. They have undergone rigorous testing and development and have been used in various sectors. As a result, there is some assurance in their dependability and performance.

Disadvantages:

1.  Pipeline Modification: Tapping or hot tapping the pipeline is required to install an intrusive signaller, which could pose concerns like leaks or corrosion. Careful planning, qualified people, and adherence to safety procedures are needed to reduce these hazards. To ensure pipeline integrity, proper tapping methods and routine inspections are required.

2.  Maintenance Obstacles Due to the physical elements present or the requirement to regularly check the reliability of the tapped connection, intrusive signallers may need more frequent maintenance. Routine inspection and maintenance are necessary to guarantee optimum performance and avoid problems. This entails inspecting the tapped area for corrosion, wear, or damage and properly sealing the connection.

3.    The integrity of the Pipeline: The tapping procedure could compromise the integrity of the pipeline wall. This emphasizes the significance of using appropriate.