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Why is a Breakaway Valve Installed on LNG Loading Arms?

2021-08-10

(Content Translation)
The breakaway valve (also known as an Emergency Release Coupling - ERC) is installed on LNG loading arms as a critical safety mechanism. Its primary purpose is to prevent catastrophic incidents during LNG transfer operations. In scenarios such as:

  • Unexpected movement of the tanker truck or ship (e.g., driver error, vessel drift).

  • Excessive force on the loading arm due to operational accidents.

  • Emergency situations like fires or leaks requiring immediate disconnection.

The valve automatically severs and seals both ends of the connection instantly, minimizing LNG leakage, avoiding equipment damage, and ensuring the safety of personnel, facilities, and the environment. This design aligns with international safety standards (e.g., OCIMF, ISO 28460) for hazardous fluid transfer.


Key Reasons:

  1. Safety: Prevents spills and potential fire/explosion risks.

  2. Equipment Protection: Avoids structural damage to loading arms and pipelines.

  3. Environmental Compliance: Mitigates LNG release (a potent greenhouse gas).

  4. Operational Reliability: Ensures compliance with industry best practices.

(Note: "Loading arm" is used generically for both loading/unloading operations in industrial contexts.)