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Safety and environmental standards for fuel storage sites
Final report
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315 For this site immediate causes could be, for example:
accidental leakage – valve left open, coupling not made correctly;
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flexible hose failure;
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pipeline failure;
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valve, pump, flange, or coupling failure;
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bulk tank failure;
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road tanker failure;
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overfilling.
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Step 2.2.3: Identify the primary causes
316 This step is important as it is a prerequisite to deciding which risk control systems are
important to prevent or control the challenge to integrity. For this site primary causes could be:
under pressure;
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lightning strike;
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over-pressure;
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corrosion;
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joint flange gasket aging;
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wrong material;
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physical damage;
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subsidence;
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wrong product;
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wear;
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wrong installation;
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vibration;
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overheating;
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static discharge;
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wrong specification;
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quality of material.
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Step 3.1: Identify the associated risk control systems
317 Draw up a risk control matrix as illustrated in Table 15, to help decide which risk control
systems are the most important in controlling the challenges to integrity identified within the
incident scenarios.
Table 15
Risk control matrix
Risk control
systems
Challenges to integrity
Overfilling Accidental
leakage
Over-
pressure
Corrosion Wear Physical
damage
Subsidence
Control and
instrumentation
Operational
procedures
Competence
Inspection and
maintenance
Design
PTW
Plant change
Control of
contractors