Year: 2020 Language: english Author: ABS Format: PDF Quality: eBook Pages count: 26 Description: Cyclic loading from ocean waves can cause fatigue damage and cracks in marine and offshore structures. If these cracks are left to propagate they can compromise the structural integrity and safety of the vessel/asset. To protect the vessel/asset and preserve life and the environment, class societies typically require owners to permanently repair cracks located at critical areas of structures. For cracks located at non-critical areas, when constraints such as hot work restrictions make permanent repairs impractical during normal operations, temporary repairs may be considered on a case-by-case basis. To permanently repair a cracked structure inside the cargo tank of a Floating Production Storage and Offloading (FPSO), the operator must: • Halt production • Empty the affected tank • Clean the affected tank • Make the confined space safe for human entry • Make the confined space safe for hot work (depending on the type of repair) In today’s sensitive economic environment, owners want a repair solution that features an expedited, reliable, and safe repair process. A temporary repair method with these features is desired to allow normal operations until the next scheduled inspection. Cold expanded crack arrest hole technology has been used to improve the fatigue life of crack arrest holes (i.e. stop holes) and satisfies the necessary features of repair (Reid 2014). .
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Advisory on Cold Expansion Technology
Language: english
Author: ABS
Format: PDF
Quality: eBook
Pages count: 26
Description: Cyclic loading from ocean waves can cause fatigue damage and cracks in marine and offshore
structures. If these cracks are left to propagate they can compromise the structural integrity and safety of the
vessel/asset. To protect the vessel/asset and preserve life and the environment, class societies typically require
owners to permanently repair cracks located at critical areas of structures. For cracks located at non-critical areas,
when constraints such as hot work restrictions make permanent repairs impractical during normal operations,
temporary repairs may be considered on a case-by-case basis.
To permanently repair a cracked structure inside the cargo tank of a Floating Production Storage and
Offloading (FPSO), the operator must:
• Halt production
• Empty the affected tank
• Clean the affected tank
• Make the confined space safe for human entry
• Make the confined space safe for hot work (depending on the type of repair)
In today’s sensitive economic environment, owners want a repair solution that features an expedited,
reliable, and safe repair process. A temporary repair method with these features is desired to allow normal
operations until the next scheduled inspection. Cold expanded crack arrest hole technology has been
used to improve the fatigue life of crack arrest holes (i.e. stop holes) and satisfies the necessary features
of repair (Reid 2014).
.
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