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An overview of the Design Appraisal services offered by LR Energy. This presentation covers: > Design Appraisal Methods > Verification > Third-party compliance > Certificate of fitness
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Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Yeramilli Srinivas
Lead structural engineer
Design Appraisal for Offshore Structures
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Design Appraisal Methods
• Design Appraisal by review of client design reports
• Design Appraisal by Independent analysis
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Design appraisal types
• VERIFICATION WITHIN A REGULATORTY FRAME WORK
• THIRD PARTY COMPLIANCE REVIEW
• CERTIFICATE OF FITNESS (COP)
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
VERIFICATION
• Purpose: to safeguard personnel by avoiding major accidents
• Scheme operated by Duty Holder
• Safety Case
• SCE’s
• Performance Requirements/standards
• Verification/suitability Statement
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
3rd Party Compliance Review
• Purpose: to undertake an agreed scope of design review.
• Scope defined by Client
• Assessed to client specification
• LR DAD or Report.
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Certificate of Fitness (CoF)
• Purpose: to ensure the integrity of the installation
• Scheme operated by LR on behalf of Regulator
• Standards and Regulatory requirements
• Design Review + Offshore Survey
• Certificate of Fitness
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Design appraisal of the following structures
• Fixed offshore jacket
• Topside structures
• Tripod systems and bridges
• Near shore structures such as jetties
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Design appraisal for inplace conditions for verification
• Inplace Analysis
• Fatigue Analysis
• Earthquake Analysis
• Boat Impact analysis
• Blast Analysis
• Push over analysis
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Software's used for independent analysis
• SACS – Structural analysis computer system
• STAAD PRO – Structural analysis software
• USFOS – for non-linear Analysis
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Design appraisal for installation conditions for third party review jobs• Loadout
• Sea Transportation
• Lift
• Upend
• On-bottom stability
• Docking
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Design Appraisal of Life extension of platforms
• Design appraisal by Review of documents
• Design appraisal by independent analysis
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Primary Documents required for Review
• Up to date weight control report
• Up to date metocean report
• Geotechnical report
• Up to date inspection reports of platforms for scour depths , member damage , corrosion , marine growth and fatigue cracks , CP measurements.
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Primary Analysis required for review for life extension
• Inplace analysis
• Fatigue analysis
• Ship Impact analysis
• Redundancy analysis
• Push over anlysis
Lloyd’s Register services to the energy industry
November 11-14, 2012 Adipec
Design appraisal flow chart
Documents/Drawings, asidentified by LR, issued at AFDand submitted by Designers
LR comments/approval,including status, submitted ona Comment Response Sheet
(CRS)
Designer accepts or providesadditional comments
Designer responds on CRSLR closes out CRS or reviews
additional comments
New CRS cycle if required
Closed-out CRS passed to SiteSurveyor to check that any
changes have beenincorporated in Site Drawings
LR Design Team reviewdocuments
CRS Closed outApprovedComment
November 11-14, 2012 Adipec
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