Pipe-in-Pipe Design
Experience
Since its inception, KW Ltd has worked on the design
of pipe-in -pipe systems. The range of projects has
included design assurance, support to operators, conceptual
and detailed design. KW has analysed and designed numerous
pipe in pipe systems, from bonded systems to sliding
reeled systems. Detailed Design Projects have included
HPHT and deep water pipeline systems.
KW can demonstrate a first class technical capability
coupled with an unrivalled track record in the field
of detailed design and analysis of pipe in pipe systems.
We believe that this background ensures KW provides
the service and support required for the successful
completion of pipe in pipe projects.
Technical Capability
Detailed analysis of pipe-in-pipe systems, including:
• Determination of flowline material properties.
• Detailed design of end and midline bulkheads.
• Evaluation of requirements for water stops and
optimised spacing.
• Detailed design of field joints.
• Thermal analysis for pipe-in-pipe, bulkheads
and field joints.
• Analysis of sliding pipe systems and effect
of reeling residual strains on in-place behaviour.
Limit State and Strain Based Analysis and Assessment,
including:
• Preparation of assessment limits for the required
forms of strength limit states.
• The use of finite element modelling for strain
based analysis.
• The preparation of limiting strain levels relating
to the flowline and outer pipe materials.
• Evaluation of strain limits for fracture and
application of ECA methodologies.
• Analysis of cyclic loading conditions and fatigue
limit states.
In addition, upheaval buckling/OOS and lateral buckling
solutions have been developed as part of detailed design.
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