Description

Pig Signaller is a vital instrument for detecting and indicating the passage of a pig through a specific point in a pipeline. Operators install these devices at both the launcher and receiver ends to confirm the start and completion of a pigging run. The EMT series provides reliable, real-time feedback that prevents operational errors and ensures flow assurance. These indicators work effectively in high-pressure oil and gas environments across the Middle East and Southeast Asia.

Technical Specifications and Parameters

Precision engineering defines the EMT Pig Signaller range. We manufacture each unit to withstand the corrosive and high-pressure nature of midstream assets. The following table and list detail the core technical parameters:

Feature	Technical Specification
Mounting Type	2″ Flange (ASME B16.5), NPT Thread, or Welded Base
Pressure Rating	Up to CLASS 2500 (or 25 MPa / 3625 Psi)
Body Material	ASTM A105N, 304SS, 316L SS, or Duplex Stainless Steel
Internal Parts	316L Stainless Steel or Inconel for sour service
Ingress Protection	IP66 / IP67 (Dust-tight and water immersion protection)
Explosion Proof	Exd II BT4 to Exd IICT6 Gb
Seal Material	PTFE or Viton (High-temperature resistance)

• Operating Temperature: Standard range -20°C to 120°C (Extended to 300°C upon request).

• Trigger Mechanism: Bi-directional or uni-directional mechanical intrusive trigger.

• Signal Output: Manual reset flag, electrical switch (SPDT/DPDT), or digital display.

• Insertion Depth: Adjustable to fit different pipe wall thicknesses.

• Corrosion Compliance: All wetted parts meet NACE MR0175 standards.

High-Performance Product Features

The EMT Pig Signaller incorporates advanced design elements to maximize field reliability:

• Intrusive Mechanical Trigger: The high-sensitivity omni-directional trigger reacts instantly to the physical movement of the pig. This mechanical design ensures detection even in pipelines with heavy paraffin or thick crude oil.

• Online Retrieval System: We offer models with an integrated isolation valve or ball valve mechanism. This feature allows technicians to remove the internal sensing unit for maintenance while the pipeline remains under full pressure.

• Explosion-Proof Signal Box: For hazardous zones, our electrical indicators feature heavy-duty explosion-proof enclosures. These boxes provide reliable remote signals to the central control room (SCADA) via dry contacts.

• Corrosion-Resistant Metallurgy: Our use of 316L and Duplex steels prevents failure in H2S and CO2 rich environments. This durability reduces the total cost of ownership for offshore and onshore operators.

Critical Industry Selling Points

Our Pig Signaller serves as the primary verification tool for complex pigging operations. In the Southeast Asian market, where subsea pipelines are common, positive indication is critical for safety. The EMT design eliminates “false positives” caused by fluid turbulence or pressure surges. We calibrate every trigger to ignore liquid flow while responding only to solid objects.

The manual reset flag provides a clear visual cue for field personnel even from a distance. For remote stations in the Middle East deserts, the electrical output reduces the need for manual inspection. This automation increases operational efficiency and minimizes human exposure to remote sites. Furthermore, our products support various pig types, including foam, mechanical, and electronic smart pigs.

Installation and Site Support

Proper installation of the Pig Signaller ensures long-term accuracy and prevents leaks. EMT provides specialized welding bases and flanged connections that match your existing pipeline specifications. We recommend installing indicators at least five pipe diameters away from bends or valves to avoid turbulence.

Our engineering team provides detailed mounting instructions for both horizontal and vertical orientations. We also offer customized insertion lengths to accommodate insulated pipelines. Every unit undergoes rigorous hydrostatic testing at 1.5 times the design pressure before shipment. We provide full material traceability and test certificates to meet international procurement standards.

Ensuring Pipeline Flow Assurance

Maintaining the integrity of a pipeline requires consistent and accurate data from every Pig Signaller. These devices provide the empirical evidence needed to confirm that cleaning tools have successfully traversed high-risk areas. Without reliable signaling, operators risk “lost pigs” which can lead to catastrophic blockages and production shutdowns.

By integrating EMT monitoring solutions, energy companies enhance their risk management strategies. Our indicators offer a robust and cost-effective method to monitor internal pipeline activities. We continue to innovate our sensing technology to meet the evolving demands of the global oil and gas industry. Contact our technical sales team for a specific project quotation or to review our full range of pipeline accessories.