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process safety · pipeline operations

Pipeline leak response event tree

A pipeline leak event tree follows a loss of containment through the safeguards that can limit its impact. Leak detection provides the first opportunity to respond, remote isolation can reduce the amount released, and ignition prevention separates a release from a fire outcome. The outcome rows intentionally stop when a scenario has already reached a final consequence. This makes the event tree easier to review and avoids suggesting that a later barrier can undo an earlier uncontrolled release. Operations, safety and integrity teams can use this drawing to agree on the sequence of barriers before assigning site-specific reliability data. It is a screening model, not a substitute for detailed hydraulic, dispersion or fire consequence calculations.

Tipo Albero degli eventiStandard IEC 62502:2010Motore schematex-eventtreeAggiornato 24/09/2026
Pipeline leak response
Drawing preview
La richiesta

“Create an event tree for a pipeline leak with leak detection, remote isolation, and ignition prevention barriers, ending in contained release, jet fire, large release, or uncontrolled release.”

Prova alloraAdd emergency response after remote isolation.Change the initiating leak frequency to 0.001.
Cosa contiene questo disegno

Leggi le decisioni che ne stanno alla base.

01Detection first

Alarm response must occur before remote isolation can be effective.

02Isolation second

Closing the line limits release size.

03Ignition last

Preserve an ignition branch only while material is still released.

Use for a high-level leak-response review before performing detailed dispersion or consequence modelling.

Sfoglia tutti i modelli di tipo albero degli eventi →

FAQ

Domande frequenti

What is the initiating event here?

The initiating event is a pipeline leak, expressed with a frequency before any barrier succeeds or fails.

Why is isolation after detection?

Detection identifies the event and triggers the response that allows remote isolation to close the line.

Can I add more barriers?

Yes. Add barriers such as emergency response, deluge or evacuation in the order they influence the scenario.