Slay parameters 1

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S-lay parameters (1)

• High tension needs reducing of radius
• Departure angles 80-90 degr
• Resulting in low bottom tension
• Small stinger radius 70-100m
• Long stinger
• (72m Lorelay, 110m Solitaire)

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Lorelay normal stinger
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Lorelay small radius stinger
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S-lay parameters (2)

• Small stinger radius -gt high BM in pipe
• Strain on stinger limited to 0.3-0.5 (material
  dependent)
• Residual strain 0.2 (DnV 81)
• DnV 2000 may allow even more
• Weld defect size small
• Superior welding system required
• Automatic UT required to detect defects

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Phoenix welding
Phoenix welding
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Automatic UT system
Automatic Ultrasonic Testing
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Connection methods

• first end pull-in
• first end stab and hinge-over
• PLEM and inverted U-spool piece
• Steel Catenary Risers

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stab and hinge-over connection to manifold
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PLEM installation in J-mode
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first-end SCR hang-off