Sildnes Tore Dnv Class Rules Krsand2006 838

- Updates of Offshore Class Rules/Standards - Continuous Class - Revised AoC (SUT) Handbook

by Tore Sildnes, Dept. for Offshore Class Technology, DNV Høvik

Kristiansand, March 2006

DNV Offshore Codes: Formal Document Structure „

Offshore Service Specifications:

Classification (100-series) Governmental Compliance (200-series) Risk Based Verification (300-series) Technology Qualification Management (400-series) - Other Services (900-series) -

– Quality & Safety (A-series) – Materials (B-series)

„ Offshore Standards:

– Structures (C-series) – Systems (D-series)

„ Recommended Practices:

– Special Facilities (E-series) – Pipelines & Risers (F-series) – Asset Operation (G-series) – Marine Operations (H-series) – Wind Turbines (J-series)

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DNV Offshore Codes: Facts and Figures „

First Code issued 1999

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Now consisting of 73 publications OFFSHORE STANDARD DNV-OS-B101

- 14 Offshore Service Specifications

METALLIC MATERIALS

- 27 Offshore Standards

JANUARY 2001

- 32 Recommended Practices „

Further 28 documents planned or under development

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8 new publications issued in 2005/2006

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9 publications revised with new editions in 2005/2006

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Classification based on Offshore Codes Classification Specification DNV-OSS-101 Main Class

Additional Class

DNV-OS-A101 Arrangement

Drilling DNV-OS-E101

Materials DNV-OS-B101

Mooring DNV-OS-E301

Structural Design DNV-OS-CXXX

Helideck DNV-OS-E401

Structural Fabrication DNV-OS-C401

Dynpos Ship Rules Pt.6

Guidance Documentation DNV-RP-A201 DNV-RP-A202

Stability & Watertight Integrity DNV-OS-C301 Marine And Machinery Systems DNV-OS-D101 Electrical Systems DNV-OS-D201 Instrumentation DNV-OS-D202 Fire Protection DNV-OS-D301 Version

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Existing Offshore Standards updated 2005: „

Safety Principles - DNV-OS-A101; Safety Principles and Arrangements, October 2005

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Structural design standards: - DNV-OS-C105; Structural Design of TLPs (LRFD method), October 2005 - DNV-OS-C201: Structural Design of Offshore Units (WSD method), April 2005

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Machinery / Mechanical standard: - DNV-OS-D101: Marine and Machinery Systems and Equipment, October 2005

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Electrical standard: - DNV-OS-D201: Electrical Installations, January 2005

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Fire Protection standard: - OS-D301: Fire Protection, October 2005

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Production Plant standard: - OS-E201: Oil and Gas Processing Systems, October 2005

No major changes, but general update to incorporate user feed-back and provide technical improvements 04 April 2006

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Development and Updates 2005-2006 relevant for MOUs New Offshore Standards issued: „

DNV-OS-E403; Offshore Loading Buoys

New Recommended Practices: „

RP-E303: Geotechnical Design and Installation of Suction Anchors in Clay, October 2005

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RP-E304: Damage Assessment of Fibre Ropes for Offshore Mooring, April 2005

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RP-F204: Riser Fatigue, July 2005

Updated Recommended Practices:

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DNV-RP-C103: Column Stabilised Units, February 2005

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DNV-RP-C203; Fatigue Strength Analysis of Offshore Steel Structures, August 2005

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Publication methods „ Paper copies „ CD-ROM „ Electronically available on internet www.dnv.com – Select “Technology Services” and “Offshore Rules and Standards online” from short-cut menus

„ Free read-only + Member subscription access for download/print „ Rig Owners, designers and authorities get free password - Contact: Det Norske Veritas, Distribution Department, NO–1322 Høvik, -

Norway, e-mail: [email protected] Tel: +47 67 57 99 00 fax: +47 67 57 93 20

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Offshore Class Rules Current editions: • DNV-OSS-101: Rules for Classification of Offshore Drilling and Support Units; October 2003 • DNV-OSS-102: Rules for Classification of Floating Production and Storage Units; October 2003

Update ongoing, new edition will be issued 2006

Main update items: •

New section “Survey of Towing, Emergency & Temporary and Position Mooring Equipment” to include: • detail survey requirements • survey examination guide • acceptance and repair criteria

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New approach to machinery surveys 04 April 2006

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Mooring chain inspection requirements (1) Chain less than 20 years old: „

If proper documentation and history is presented, and no reported failures, requirements are: -

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100% visual examination 5% NDT on general chain 20% NDT on chain which has been in way of fairleads over last 5 years 20% NDT on chain which will be in way of fairleads over next 5 years

If no documentation or history is available then examination will be increased to include mechanical testing of each length of chain and increased NDT. Assuming working area cannot be defined, then 20% of whole chain

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Mooring chain inspection requirements (2) Chain greater than 20 years old: „

If all documentation is available, and historical information including previous reports showing no failures and only minor repairs, then current survey extent can remain in place.

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If no documentation is available (i.e. no certificates, unable to identify the chain, unable to ascertain orientation of the chain, which parts have been over the fairleads etc) then the chain shall be subjected to 20% NDT and mechanical testing of all lenghts

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If documentation review reveals history of defects, then NDT shall be increased to 100% in the areas where defects are found

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Machinery Surveys Challenges with Traditional Machinery Surveys: „

Intrusive

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Causes delays

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Costly

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Limited value adding ( in some cases)

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Different Approaches to Class Machinery Surveys

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Traditional opening of machinery every 5 years

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Continuous Machinery Surveys

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Approved Planned Maintenance System

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Condition Monitoring

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Reliability Centred Maintenance

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Scope for update of OSS-101/102 „

To introduce into Offshore Class Machinery Survey scheme: - Condition Monitoring - Reliability Centered Maintenance

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This will provide alternative machinery survey arrangements which can be used by Owners to: - define their maintenance plan - optimize their maintenance effort - and still comply with Classification requirements.

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Condition Monitoring „

Proposed new Rule text: - Machinery equipped with instrumentation enabling the condition of the machinery components to be ascertained and monitored may be subject to special approval regarding the extent and method of the survey.

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Requires approval of monitoring system, implementation survey and baseline measurements (performed by DNV)

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May require FMEA/failure consequence analysis

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Monitoring Requirements - Guidance in Classification Note 10.2 - Examples of types of monitoring: - computer based diesel engine performance analyser - bearing temperature monitoring - vibration monitoring - analysis of oil sample results (water, metal content) - performance monitoring (e.g. pump output pressure) - leak detection - deflection measurements - sparking across oil film - cathodic protection readings

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Reliability Centered Maintenance (RCM) „

a well proven and accepted methodology in the process, aviation and offshore industry.

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provides a method for establishing a preventative maintenance programme, which is intended to result in improved overall safety, availability and economy of operation.

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based on analysing defined systems and sub-systems with respect to their failure modes.

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The following seven basic steps need to be reviewed for the equipment or system under scrutiny: 1. What are the system functions and associated performance standards? 2. How can the system fail to fulfil these functions? 3. What can cause a functional failure? 4. What happens when a failure occurs? 5. What effect or consequences will a failure have? 6. What can be done to detect and prevent the failure? 7. What should be done if a maintenance or proactive task cannot be found?

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RCM - What must be done? „

Systemise machinery/equipment and identify boundaries, e.g. ballast water system, including pumps, strainers, valves.

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Carry out a risk assessment defining criticality of equipment within the system. - (Note: DNV has developed a new version of its ORBIT risk assessment software tool specifically for use in RCM risk assessment)

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DNV will review submitted RCM analyses against the agreed standard in dialogue with the Owner.

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An implementation survey/baseline measurements will be carried out onboard the unit by a qualified DNV surveyor.

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Follow up will be carried out on an annual basis normally by means of audit and spot checks.

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Result -this could mean a PM system offering greater confidence, less cost and less disturbance to operational activity

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AoC Handbook

Acknowledgement of Compliance (AoC - SUT) Background „

Definition: - An AoC is a decision made by the Petroleum Safety Authority (PSA) that the technical condition of a MOU, the applicant's organisation and management system, are considered to be in compliance with relevant requirements in Norwegian shelf legislation.

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August 2000: - Introduction of a voluntary arrangement with AoC for mobile drilling facilities

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January 2004: - AoC made mandatory for drilling units with a transition period until January 2005.

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AoC – 2006 Extension AoC will from 2006 be extended to include:

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- production, storage and offloading units (FPDSO and FPSO) - accommodation units - well intervention units.

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Transition period until 2008

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Extension of AoC will enter into force when approved by Government (expected before Easter)

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AoC (SUT) Handbook – Background „

Developed through a co-operation between NPD/PSA, NMD, NSA, OLF, LO/NOPEF, SAFE, TBL, Lederne and DNV

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Objective: - contribute to a rational and efficient application process for AoC. - represent a supportive element for standardization and simplification of such applications.

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1st issue July 2000

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Rev.01 July 2002

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Rev.02 Jan.2004

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Rev.03 planned issued April -06

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AoC Handbook - Contents CONTENTS: „

VERIFICATION SYSTEMATICS

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THE VERIFICATION OBJECT

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VERIFICATION REFERENCES

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VERIFICATION METHODS

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QUALIFICATION

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DOCUMENTATION

ENCLOSURES „

STATUTORY GUIDELINES - Guidelines for application for (AoC); (by PSA and NMD 1.1.2006). - Use of HES Regulations on Mobile Offshore Units – use of maritime legislation/norms; (NPD memo issued 19.12.2002) - Technical Requirements to Working Environment and Health Department on Mobile Facilities – Alternative Norms ; (NPD memo issued 26.6.2003)

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APPLICABLE LEGISLATION AS OF 1ST JANUARY 2006.

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USE OF MARITIME CERTIFICATES, CLASS AND MANAGEMENT SYSTEM

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TECHNICAL NORMS AND STANDARDS FOR MOBILE OFFSHORE UNITS 04 April 2006

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D: Technical Norms and Standards for the different Areas on a Mobile Offshore Unit.

NSFI Area 1

Technical requirements in PSA regulations

Standards referred to in FR

Direct reference to NMD

Can Sec. 3 in HES be used?

Alternatives to FR

UNIT GENERAL Stability The Facilities Regulations Sec. 63

NORSOK N-001 Ch. 7.10 (which further refers to NMD's regulations, but extent of damage and requirement for reserve buoyancy shall be based on risk analyses)

NMD Stability, §8 to §51

Yes

NMD Stability For Self-elevating units; DNV OS-C301 Stability and Watertight Integrity Sdir Production , §17, 2-3

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Other The following does not comply with the NSFI system, but are included in order to comprise topics that would otherwise be left out as the NSFI system is equipment-specific, resulting in that arrangement etc. is not considered.

Arrangement The Facilities Regulations Sec. 6

See regulations.

The Facilities Regulations Sec. 15

Regulations issued by The Directorate for Fire and Electrical Safety (DBE)

The Facilities Regulations Sec. 59

NORSOK C-001 C-002 S-001 S-002 (+ additions as given in the guidelines)

The Facilities Regulations Sec. 12

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No

Yes

NMD Construction + NMD Living quarter + NMD Fire + NMD Operation § 13 For details see Encl. A3; NPD letter of 26.06.2003

See complementary text in guidelines to Sec.12 alternatively: - for access routes: NMD Construction

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AoC Handbook – Changes for 2006 revision „

Extension of text to incorporate FPSO, accommodation and well intervention units

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Inclusion of latest edition of PSA Guideline for AoC application

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Update of references

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Appendix D “TECHNICAL NORMS AND STANDARDS FOR MOBILE OFFSHORE UNITS” now divided into 3 parts, - drilling equipment and systems - productions equipment and systems - well intervention equipment and systems

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Units for well intervention is divided in three categories; - Category 1- Light well intervention ( without marine riser) - Category 2 – Medium Interention; (high pressure marine riser to the surface) - Category 3 – Heavy Intervention; (pulling of production piping and possibly abandoning wells

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