What is a Flip-Flap Valve Marine Breakaway Coupling?

In the world of offshore operations, a flip-flap valve marine breakaway coupling is commonplace. They help ensure the safe and reliable operation of fluid transfers while ensuring minimum downtime if there’s an incident.

This article explains the role of marine breakaway couplings and how flip-flap valves work. Explore our website for more information on Breakaway Couplings.

What is a Marine Breakaway Coupling?

A marine breakaway coupling is a safety device used to secure fluid transfer operations at sea. The safety coupling responds to excessive pressure or tension in the hose transfer system. In the event of an extreme tensile load being applied to the hose string, the coupling disconnects. This also shuts off product flow through the system.

Marine breakaway couplings are important to avoid a tanker breakout or excessive pressure surge. Using breakaway couplings reduces the risk of damage to equipment and harm to personnel. It also helps to avoid spills that could harm marine ecosystems.

Flip-flap valve marine breakaway coupling used in a ship to terminal transfer. — Breakaway couplings are heavily used for the safe transfer of liquid cargo.

What is a Flip-Flap Valve Marine Breakaway Coupling?

Breakaway couplings use flip-flap valves to guarantee 100% shut-off in an emergency. Valve closure is instant and leak-free to avoid spills of dangerous and high-viscosity products such as kerosene or crude oil.

The high-grade stainless steel components enable instant and automatic operation of the device. Breakaway couplings are also incredibly compact and lightweight thanks to their advanced flip-flap technology.

Flip-Flap Valve Breakaway Coupling Operation

Flip-flap valve breakaway couplings activate as follows:

Extreme tensile load or pressure detected in the hose string
Flip-flap valves shut to prevent any spills
Triggers internal components to release the coupling
Both parts of the coupling separate to release the pressure/tension

Once the breakaway coupling triggers, the valves will stay closed shut. Personnel will remove the coupling once the emergency is over and the coupling gets manually reset. This guarantees absolute safety and avoids any spills into the marine environment.

Applications for Marine Breakaway Couplings

Breakaway Couplings are suitable for a wide range of applications in offshore fluid transfer operations. Their ability to work with industry-standard fittings makes implementing them into existing hose transfer systems easy.

The couplings’ versatile design means that they find extensive use in offshore oil, gas, chemical and fuel transfers. Here are some of the main applications for marine breakaway couplings at sea:

Bunkering Operations

Bunkering is the process of refuelling a ship, either at sea or berthed at port. These operations usually happen at sea between two vessels; an operation known as a ship-to-ship (STS) transfer.

Vessel drift can occur during these operations, causing tension on the hose string to increase. If this happens, the coupling avoids damage to the vessels and any spills of petroleum fuel into the sea.

Single Point Mooring (SPM) buoy in fluid transfer operation. — Offshore terminal using breakaway coupling during transfer.

FPSO Transfers

Floating Production Storage and Offloading (FPSO) vessels are enormous floating oil and gas production rigs. They stay at sea for several years at a time and need to regularly offload their cargo to other vessels.

Oil and gas transfers between FPSO and storage vessels can be risky. Breakaway couplings guarantee the transfer goes smoothly and avoids losing precious cargo.

Terminal Transfers

The most common way oil and gas makes its way to shore is from offshore terminals. A storage vessel moors to a series of buoys, then transfers its cargo to the terminal via a hose string.

Stormy weather can disrupt these simple operations, causing tension on the hose string. Breakaway couplings are fundamental in avoiding any damage to the ship, the hose, or the terminal. They also avoid hazardous cargo spills near the shoreline.

Conclusion

Flip-flap valve marine breakaway couplings are essential safety tools in offshore operations. Cargo, personnel and the environment are guaranteed protection when using these couplings.

Instant closure and 100% leak free design means there is no danger of cargo spills whatsoever. These features have solidified a place for breakaway couplings across many applications. Operations like STS transfers and bunkering run problem-free because of the guaranteed failsafe offered by breakaway couplings.