Forbes Marshall Pipeline Connectors FMPC
Plants using steam, even the average-sized ones, typically contain hundreds or even thousands of steam traps that require routine maintenance. Traditionally, the time needed to replace or repair a trap is dictated by how easily it can be removed from the pipeline, often necessitating a complete system shutdown.
Forbes Marshall addresses this challenge with pipeline connectors. These connectors are engineered to ensure quick, easy, reliable, and safe connection of steam traps to the pipelines.
The unique and modular design of the Forbes Marshall Pipeline Connectors (FMPC), which are forged carbon steel connectors for use with swivel-type steam traps, allows for rapid trap removal and replacement—in a matter of minutes. This design simplifies installation, operation, and maintenance.
Furthermore, the FMPC eliminates space constraints and the need for multiple welded joints. They feature integral piston-type isolation valves, which are key to enabling rapid inline trap replacement, testing, and depressurisation without the requirement of shutting down the entire steam main.
Key Technical Specifications
- Body Design: ASME Class 600.
- Max Operating Pressure (PMO): 42 bar g / 609 psig (Class 300).
- Max Operating Temperature (TMO): 425°C / 797°F.
- Sizes & Connections: DN 15 (1/2″), DN 20 (3/4″); Screwed BSPT/NPT or Socket Weld
- Integral leak-proof piston valves with graphite and stainless steel sealing rings.
- Universal flange compatibility for easy swivel trap attachment.
- Built-in options for trap bypassing, trap venting, and trap testing.
Variants
Mainline connector with an upstream isolation valve.
Includes upstream isolation and a trap bypass valve (DV1).
Includes upstream isolation, bypass valve (DV1), and trap vent valve (DV2).
Includes upstream isolation, bypass (DV1), vent (DV2), and a trap test valve (DV3) for monitoring trap performance.
Frequently Asked Questions
Yes, using the Forbes Marshall Pipeline Connector’s integral upstream isolation valve and trap vent valve, you can safely isolate and depressurize the trap module, allowing you to unbolt and replace the swivel trap without shutting down the main line.
The DV3 valve allows operators to monitor and test trap performance visually when the connector is tied into a closed condensate return pipeline.

