HSSE Management Tours - BG Group

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Key Integrity Barriers
Topic 11 – Piping (Incl. Small Bore Piping)
• Piping systems represent the conduit in a pressure
containment system by which hydrocarbons
and other contained fluids are transported for
processing. They form critical components of a
pressurised containment system and are usually
the weak point in the process as a result of material
degradation through a range of mechanisms,
predominantly corrosion (internal or external) or
erosion processes.
• The critical issue in facility Piping systems is
ensuring that the periodic inspections have been
carried out. Because they are usually very complex,
it is best to analyse and categorise piping systems
using criticality (susceptibility to failure and likely
consequences of failure). The inspection program is
then driven by the derived criticality.
• Some important areas are:
– Small bore piping (< 2”) is thin walled and
HSSE Management Tours:
Asset Integrity Guide
more susceptible to damage, and failure due to
vibration. A register of small bore piping with a
prescribed program of inspection is best practice.
– Piping joints are particularly vulnerable. Flanges
should be subject to a flange management
programme to provide assurance of their quality.
– Corrosion under insulation (CUI) is a key risk
leading to piping failure. An assessed and
documented inspection programme is needed.
– Likely or expected internal corrosion mechanisms
that relate to the fluids within the facility should
be captured in a corrosion risk register.
– Temporary repair of piping by various means
(engineered clamps or wraps) may be allowed
at site, however these repairs must be closely
monitored whilst in place, be recorded on a
register, have a maximum defined life and a clear
priority for permanent repair.
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