Welding
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Consequences of weld failure
Consequences of weld failure
Consequences of weld failure
Every weld in a pipeline is a critical link on which the system depends. If a weld fails, the consequences can be catastrophic for the environment, and for the operator’s bottom line and reputation. Environmental disasters thought to have been caused by weld failure include the collapse of the Alexander L Kielland semi-submersible oil rig in 1980, which killed 123 people, and the San Bruno gas pipeline explosion in 2010, in which 8 people lost their lives.
Weld defects can occur for several reasons – using the wrong materials for the job, applying the incorrect process, welding under difficult conditions or an inexperienced or unskilled welder. Even when welds are successful, they will become worn over time and will require inspection throughout their life cycle.
‘Fatigue failure’ – where small cracks form and spread on a welded structure due to the continued application of stress – can happen in a short time and is a particularly high risk for welds in critical structures such as pipeline risers and stalk tie-ins.- 0 Replies
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