Setting The Standard 648
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Setting the standard DNV Offshore Codes Svein Flogeland Product Manager, Offshore Class DNV Technical seminar on Mobile Offshore Units Mumbai, February 15th 2008
What is classification?
Classification is a system for safeguarding life and property at sea, and the environment due to operational consequences
Classification implies a process of verifying offshore objects towards a set of requirements which are laid down in the clssification rules
Classification may be regarded a quality system continuously developed for the maritime industry and accepted by: -
Version
International bodies; IMO National authorities; flag states and shelf states Fabricators Owners Insurers Financiers 14 February 2008
Slide 2
Classification process Periodical PeriodicalSurveys. Surveys.In-service In-serviceinspection inspectionprogramme programme Survey Surveyprogramme programme OPERATION CONSTRUCTION
Design DesignApproval Approvalor oracceptance acceptance based basedon onalternative alternativeapproaches approaches e.g. proven record, testing e.g. proven record, testing
DESIGN ACCEPTANCE
RULES RULESAND AND INSTRUCTIONS INSTRUCTIONS
Safety Safety Principles Principles DESIGN PHILOSOPHY
THREATS THREATS FROM FROM -ENVIRONMENT -ENVIRONMENT -FUNCTIONAL LOADS -FUNCTIONAL LOADS -ACCIDENTAL LOADS -ACCIDENTAL LOADS
Version
14 February 2008
Slide 3
Principles embedded in DNV Rules Safety barriers related to design (four-line hazard defence)
Proper design and construction qualities to provide a safe platform Maintenance and inspection to sustain construction qualities Safety after credible accidents such as collision, fire, explosion or maloperation Survivability after major accidents to provide a safe haven through adequate damage stability, floatability and lifesaving capability
Version
14 February 2008
Slide 4
Safety principles embedded in DNV Rules
Safety integrity for design loads - The unit or installation shall be designed and constructed with sufficient integrity to withstand operational and environmental loading throughout its lifecycle
Maintenance to sustain intended qualitied - Survey and follow-up in accordance with In-service Inspection Program
Survivability for accidental loads - Systems and structures shall be designed with suitable functionality and survivability for prevention of, or protection from, design accident events affecting the unit
Emergency evacuation - Effective escape, shelter and evacuation facilities shall be provided to safeguard all personnel
Version
14 February 2008
Slide 5
Additional requirements Hazard
management
- Suitable measures shall be provided to enable timely detection, control and mitigation of hazards Isolation
of accidents
- Escalation to plant and areas that are not affected by the initiating event shall be avoided Redundancy
and defense lines:
- The design shall be sufficiently robust to tolerate at least one failure or operating error without resulting in a major hazard, or damage to the unit
Version
14 February 2008
Slide 6
Defence line philosophy
Defence lines or barrieres shall be established to ensure that - Probabilities that failures or situations of hazards and accidents will occur shall be kept an an acceptable level - Probabilities that such situations shall develop further shall be reduced
Version
14 February 2008
Slide 7
DNV Offshore Publications Renewal Project
New formal structure (from 2001)
“Old” formal structure (up to1999)
Servic e Specif ication s
n tio e r a tio n O p s t ru c n C o e s ig n D
Offsho re Stand ards Recom
mend ed Practi ces
Version
14 February 2008
Slide 8
DNV Offshore Codes:
3-level Document Hierarchy
Offshore Service Specifications: – Principles and procedures for DNV offshore verification, classification, qualification and asset operation services
Offshore Standards: - Technical provisions and acceptance criteria for general use by the offshore industry as well as the technical basis for DNV offshore services.
Recommended Practices: - Proven technology and sound engineering practice as well as detailed guidance for the higher level Offshore Service Specifications and Offshore Standards.
Version
14 February 2008
Slide 9
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)
Offshore Standards:
– Materials (B-series) – Structures (C-series) – Systems (D-series) – Special Facilities (E-series)
Recommended Practices:
– Pipelines & Risers (F-series) – Asset Operation (G-series) – Marine Operations (H-series) – Wind Turbines (J-series)
Version
14 February 2008
Slide 10
DNV Offshore Codes - Global standards, practices and related services covering many areas and aspects of offshore field development and operation Drill Plant: OS-E101
SEMI-SUB Safety: OS-A101 Materials: OS-B101 Hull: OS-C101 OS-C103 RP-C103 OS-C-401 Stability: OS-C301 Marine/Machinery: OS-D101 Electrical: OS-D201 Instrumentation: OS-D202 Fire Safety: OS-D301
Production Plant: OS-E201
Helideck: OS-E401
FPSO Safety: OS-A101 Materials: OS-B101 Hull: OS-C101 OS-C102 RP-C102 OS-C-401 Stability: OS-C301 Marine/Machinery: OS-D101 Electrical: OS-D201 Instrumentation: OS-D202 Fire Safety: OS-D301
Risers: OS-F201 RP-F201 RP-F202
Wire rope: OS-E303 Mooring: OS-E301 Chain: OS-E302 Anchors: RP-E301 RP-E302
Pipeline: OS-F101 RP-F101 RP-F104 RP-F105 RP-F106 RP-F107 RP-F108
FSO Safety: OS-A101 Materials: OS-B101 Hull: OS-C101 OS-C102 RP-C102 OS-C-401 Stability: OS-C301 Marine/Machinery: OS-D101 Electrical: OS-D201 Instrumentation: OS-D202 Fire Safety: OS-D301
Wellheads: OS-E101 Version
14 February 2008
Slide 11
Publication methods Electronically available on Intranet and Internet
Paper documents for “traditional” distribution CD-ROM
Version
14 February 2008
Slide 12
Service Specifications - Classification
DNV-OSS-101: Rules for Classification of Offshore Drilling and Support Units
DNV-OSS-102: Rules for Classification of Floating Production and Storage Units
DNV-OSS-103: Rules for Classification of LNG/LPG Floating Production and Storage Units or Installations
DNV-OSS-121: Classification using Performance Criteria determined By Risk Assessment Methodology
OFFSHORE SERVICE SPECIFICATION
Version
14 February 2008
Slide 13
DNV-OSS-101 / 102
Classification of Offshore Units and Installations
THREE MAIN PARTS:
Chapter 1: Principles and procedures for classification –
Chapter 2: Design and construction provisions – – –
Design and Construction Requirements for Main Class Supplementary Requirements for Service Notations, e.g. ‘Drilling Unit’, ‘Well Intervention Unit’ Design and Construction Requirements for System and Special Facility Notations, e.g. POSMOOR
Chapter 3: Operating provisions –
Version
Classification Principles, Scope and Notations, Procedure, Legal Provisions
Periodical Survey Requirements 14 February 2008
Slide 14
Class Notations
Scope of classification is determined by mandatory and additional class notations, e.g.
Construction symbol
Main character of class
1A1
Service and type notations
Ship-shaped Oil Production and Storage Unit(N)
•Special system and equipment notations
POSMOOR, ECO, CRANE, HELDK-SH, PROD(N)
Version
14 February 2008
Slide 15
Classification of Drilling Units 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
14 February 2008
Slide 16
Design Approval Requirements are given for
Safety principles and Arrangement
Material
Structural design - Traditional Working Stress Method (WSD) - Modern Load Resistance Factored Design (LRFD)
Stability and Watertight Integrity
Mooring and Towing
Marine Machinery Systems and equipment
Electrical Systems and Equipment
Instrumentation and Telecommunication Systems
Fire protection Version
14 February 2008
Slide 17
Fabrication
Detailed requirements are given for Welding procedures Qualification of welders Fabrication and tolerances Testing of welds - NDT requirements according to criticality: Special, primary and Secondary areas - Other tests - Corrosion protection system -
Development for a more effective class-yard process: - Integrating class survey programme with yards QA system by shifting focus from final “block inspection” towards correcting quality breaches in fabrication process
Version
14 February 2008
Slide 18
In-service surveys Periodic
surveys according to IACS requirements: Annual, Intermediate, Renewal Survey
Extent
of visual, close visual and NDT of the load bearing structure stated in the rules as well as in individual In-service Inspection programs (IIP) developed for each unit
Extent
of survey decided on the basis of
- Unified IACS requirements - criticality considerations - experience Version
14 February 2008
Slide 19
DNV’s Offshore Codes – Widely used industry standards
Through the establishing of self-contained technical standards, DNV Offshore Standards and Recommended Practices have become widely used technical reference standards for: -
Version
Engineering companies Oil companies Regulators Yards, Suppliers, Owners of offshore units
14 February 2008
Slide 20
Offshore Class - Relationship to International Standards
DNV is an active Contributor to International Standardisation
DNV participate in more than 50 external standardisation committees, e.g. ISO, IEC, CEN, API
Principles applied in DNV Offshore Class: - Increased use of internationally recognised standards as basis for class - Straightforward procedures for accepting alternative standards to the ones listed as basis for class
Version
14 February 2008
Slide 21
Offshore Classification
Criteria for accepting a standard for Class: Used widely in many parts of the world Widely recognised as representing good practice Regularly maintained up to date Developed by a committee representing the principal industry technical stakeholders (e.g. owners, operators, regulators, designers, manufacturers, certification bodies, academics) Reviewed by DNV and found to represent an acceptable minimum level of safety
Version
14 February 2008
Slide 22
Version
14 February 2008
Slide 23
What is classification?
Classification is a system for safeguarding life and property at sea, and the environment due to operational consequences
Classification implies a process of verifying offshore objects towards a set of requirements which are laid down in the clssification rules
Classification may be regarded a quality system continuously developed for the maritime industry and accepted by: -
Version
International bodies; IMO National authorities; flag states and shelf states Fabricators Owners Insurers Financiers 14 February 2008
Slide 2
Classification process Periodical PeriodicalSurveys. Surveys.In-service In-serviceinspection inspectionprogramme programme Survey Surveyprogramme programme OPERATION CONSTRUCTION
Design DesignApproval Approvalor oracceptance acceptance based basedon onalternative alternativeapproaches approaches e.g. proven record, testing e.g. proven record, testing
DESIGN ACCEPTANCE
RULES RULESAND AND INSTRUCTIONS INSTRUCTIONS
Safety Safety Principles Principles DESIGN PHILOSOPHY
THREATS THREATS FROM FROM -ENVIRONMENT -ENVIRONMENT -FUNCTIONAL LOADS -FUNCTIONAL LOADS -ACCIDENTAL LOADS -ACCIDENTAL LOADS
Version
14 February 2008
Slide 3
Principles embedded in DNV Rules Safety barriers related to design (four-line hazard defence)
Proper design and construction qualities to provide a safe platform Maintenance and inspection to sustain construction qualities Safety after credible accidents such as collision, fire, explosion or maloperation Survivability after major accidents to provide a safe haven through adequate damage stability, floatability and lifesaving capability
Version
14 February 2008
Slide 4
Safety principles embedded in DNV Rules
Safety integrity for design loads - The unit or installation shall be designed and constructed with sufficient integrity to withstand operational and environmental loading throughout its lifecycle
Maintenance to sustain intended qualitied - Survey and follow-up in accordance with In-service Inspection Program
Survivability for accidental loads - Systems and structures shall be designed with suitable functionality and survivability for prevention of, or protection from, design accident events affecting the unit
Emergency evacuation - Effective escape, shelter and evacuation facilities shall be provided to safeguard all personnel
Version
14 February 2008
Slide 5
Additional requirements Hazard
management
- Suitable measures shall be provided to enable timely detection, control and mitigation of hazards Isolation
of accidents
- Escalation to plant and areas that are not affected by the initiating event shall be avoided Redundancy
and defense lines:
- The design shall be sufficiently robust to tolerate at least one failure or operating error without resulting in a major hazard, or damage to the unit
Version
14 February 2008
Slide 6
Defence line philosophy
Defence lines or barrieres shall be established to ensure that - Probabilities that failures or situations of hazards and accidents will occur shall be kept an an acceptable level - Probabilities that such situations shall develop further shall be reduced
Version
14 February 2008
Slide 7
DNV Offshore Publications Renewal Project
New formal structure (from 2001)
“Old” formal structure (up to1999)
Servic e Specif ication s
n tio e r a tio n O p s t ru c n C o e s ig n D
Offsho re Stand ards Recom
mend ed Practi ces
Version
14 February 2008
Slide 8
DNV Offshore Codes:
3-level Document Hierarchy
Offshore Service Specifications: – Principles and procedures for DNV offshore verification, classification, qualification and asset operation services
Offshore Standards: - Technical provisions and acceptance criteria for general use by the offshore industry as well as the technical basis for DNV offshore services.
Recommended Practices: - Proven technology and sound engineering practice as well as detailed guidance for the higher level Offshore Service Specifications and Offshore Standards.
Version
14 February 2008
Slide 9
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)
Offshore Standards:
– Materials (B-series) – Structures (C-series) – Systems (D-series) – Special Facilities (E-series)
Recommended Practices:
– Pipelines & Risers (F-series) – Asset Operation (G-series) – Marine Operations (H-series) – Wind Turbines (J-series)
Version
14 February 2008
Slide 10
DNV Offshore Codes - Global standards, practices and related services covering many areas and aspects of offshore field development and operation Drill Plant: OS-E101
SEMI-SUB Safety: OS-A101 Materials: OS-B101 Hull: OS-C101 OS-C103 RP-C103 OS-C-401 Stability: OS-C301 Marine/Machinery: OS-D101 Electrical: OS-D201 Instrumentation: OS-D202 Fire Safety: OS-D301
Production Plant: OS-E201
Helideck: OS-E401
FPSO Safety: OS-A101 Materials: OS-B101 Hull: OS-C101 OS-C102 RP-C102 OS-C-401 Stability: OS-C301 Marine/Machinery: OS-D101 Electrical: OS-D201 Instrumentation: OS-D202 Fire Safety: OS-D301
Risers: OS-F201 RP-F201 RP-F202
Wire rope: OS-E303 Mooring: OS-E301 Chain: OS-E302 Anchors: RP-E301 RP-E302
Pipeline: OS-F101 RP-F101 RP-F104 RP-F105 RP-F106 RP-F107 RP-F108
FSO Safety: OS-A101 Materials: OS-B101 Hull: OS-C101 OS-C102 RP-C102 OS-C-401 Stability: OS-C301 Marine/Machinery: OS-D101 Electrical: OS-D201 Instrumentation: OS-D202 Fire Safety: OS-D301
Wellheads: OS-E101 Version
14 February 2008
Slide 11
Publication methods Electronically available on Intranet and Internet
Paper documents for “traditional” distribution CD-ROM
Version
14 February 2008
Slide 12
Service Specifications - Classification
DNV-OSS-101: Rules for Classification of Offshore Drilling and Support Units
DNV-OSS-102: Rules for Classification of Floating Production and Storage Units
DNV-OSS-103: Rules for Classification of LNG/LPG Floating Production and Storage Units or Installations
DNV-OSS-121: Classification using Performance Criteria determined By Risk Assessment Methodology
OFFSHORE SERVICE SPECIFICATION
Version
14 February 2008
Slide 13
DNV-OSS-101 / 102
Classification of Offshore Units and Installations
THREE MAIN PARTS:
Chapter 1: Principles and procedures for classification –
Chapter 2: Design and construction provisions – – –
Design and Construction Requirements for Main Class Supplementary Requirements for Service Notations, e.g. ‘Drilling Unit’, ‘Well Intervention Unit’ Design and Construction Requirements for System and Special Facility Notations, e.g. POSMOOR
Chapter 3: Operating provisions –
Version
Classification Principles, Scope and Notations, Procedure, Legal Provisions
Periodical Survey Requirements 14 February 2008
Slide 14
Class Notations
Scope of classification is determined by mandatory and additional class notations, e.g.
Construction symbol
Main character of class
1A1
Service and type notations
Ship-shaped Oil Production and Storage Unit(N)
•Special system and equipment notations
POSMOOR, ECO, CRANE, HELDK-SH, PROD(N)
Version
14 February 2008
Slide 15
Classification of Drilling Units 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
14 February 2008
Slide 16
Design Approval Requirements are given for
Safety principles and Arrangement
Material
Structural design - Traditional Working Stress Method (WSD) - Modern Load Resistance Factored Design (LRFD)
Stability and Watertight Integrity
Mooring and Towing
Marine Machinery Systems and equipment
Electrical Systems and Equipment
Instrumentation and Telecommunication Systems
Fire protection Version
14 February 2008
Slide 17
Fabrication
Detailed requirements are given for Welding procedures Qualification of welders Fabrication and tolerances Testing of welds - NDT requirements according to criticality: Special, primary and Secondary areas - Other tests - Corrosion protection system -
Development for a more effective class-yard process: - Integrating class survey programme with yards QA system by shifting focus from final “block inspection” towards correcting quality breaches in fabrication process
Version
14 February 2008
Slide 18
In-service surveys Periodic
surveys according to IACS requirements: Annual, Intermediate, Renewal Survey
Extent
of visual, close visual and NDT of the load bearing structure stated in the rules as well as in individual In-service Inspection programs (IIP) developed for each unit
Extent
of survey decided on the basis of
- Unified IACS requirements - criticality considerations - experience Version
14 February 2008
Slide 19
DNV’s Offshore Codes – Widely used industry standards
Through the establishing of self-contained technical standards, DNV Offshore Standards and Recommended Practices have become widely used technical reference standards for: -
Version
Engineering companies Oil companies Regulators Yards, Suppliers, Owners of offshore units
14 February 2008
Slide 20
Offshore Class - Relationship to International Standards
DNV is an active Contributor to International Standardisation
DNV participate in more than 50 external standardisation committees, e.g. ISO, IEC, CEN, API
Principles applied in DNV Offshore Class: - Increased use of internationally recognised standards as basis for class - Straightforward procedures for accepting alternative standards to the ones listed as basis for class
Version
14 February 2008
Slide 21
Offshore Classification
Criteria for accepting a standard for Class: Used widely in many parts of the world Widely recognised as representing good practice Regularly maintained up to date Developed by a committee representing the principal industry technical stakeholders (e.g. owners, operators, regulators, designers, manufacturers, certification bodies, academics) Reviewed by DNV and found to represent an acceptable minimum level of safety
Version
14 February 2008
Slide 22
Version
14 February 2008
Slide 23
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