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The electronic pdf versions of the documents found through http://www.dnv.com/ are the officially binding versions. Copyright Det Norske Veritas.
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DNV-OS-D101 Marine and Machinery Systems and Equipment |
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| Ch.1: Gearing |
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| Sec.1: Introduction |
Ch.1
SOLAS references are as quoted in MODU Code 2009 and fulfil
class requirements. Note that for compliance with flag state requirements,
later amendments may be applicable.
Ch.1 Sec.1 A
103 The standard has been written for general world-wide application.
Governmental regulations may include requirements in excess of the
provisions by this standard depending on the size, type, location
and intended service of the offshore unit or installation.
Ch.1 Sec.1 A
104 The objectives of this standard are to:
| — | provide an internationally acceptable standard of safety by defining minimum requirements for offshore marine and machinery systems |
| — | serve as a contractual reference document between suppliers and purchasers |
| — | serve as a guideline for designers, suppliers, purchasers and regulators |
| — | specify procedures and requirements for units or installations subject to DNV certification and classification. |
Guidance note: ---e-n-d---o-f---G-u-i-d-a-n-c-e---n-o-t-e---
Piping and equipment for drilling and drilling related auxiliary
systems are addressed in DNV-OS-E101.
Piping and equipment for hydrocarbon production and production
related auxiliary systems are addressed in DNV-OS-E201.
Reference to Ship Rules is conditioned that there is no coincident production and tank inspection. For units subject to in-service inspection of the cargo system during production, additional requirements are given in DNV-OS-A101 Sec. 7 or 9 as applicable.
Guidance note: ---e-n-d---o-f---G-u-i-d-a-n-c-e---n-o-t-e---
Some systems used for typical tank ship applications, (e.g.
cargo piping, ballast systems, firewater systems), need to be especially
considered, for example with respect to fabrication quality and
support arrangement, when evaluated for use on offshore installations
in view of differing operational conditions and overall safety and
maintenance philosophy.
Ch.1 Sec.1 B
| Table B1 DNV Rules, Classification Notes, Offshore Standards and Recommended Practices | |||||||||||||||||||||||||||||||||||||
| Reference | Title | DNV-OS-A101 | Safety Principles and Arrangement | DNV-OS-B101 | Metallic Materials | DNV-OS-C102 | Structural Design of Offshore Ships | DNV-OS-C103 | Structural Design of Column Stabilised Units
(LRFD method) | DNV-OS-C104 | Structural Design of Self-elevating Units (LRFD
method) | DNV-OS-C105 | Structural Design of TLPs (LRFD method) | DNV-OS-C106 | Structural Design of Deep Draught Floating
Units/Spars (LRFD and WSD Method) | DNV-OS-C107 | Structural Design of Ship-shaped Drilling and
Well Service Units | DNV-OS-C301 | Stability and Watertight Integrity | DNV-OS-C401 | Fabrication and Testing of Offshore Structures | DNV-OS-D201 | Electrical Installations | DNV-OS-D202 | Automation, Safety, and Telecommunication Systems | DNV-OS-E101 | Drilling Plant | DNV-OS-E201 | Hydrocarbon Production Plant | DNV-OS-E301 | Position Mooring | DNV-RP-A201 | Plan Approval Documentation Types - Definitions | | Rules for Classification of Ships | Classification Note 41.2 | Calculation of gear rating for marine transmissions | |
Ch.1 Sec.1 B
| Table B2 Normative references | |||||||||||||||||
| Reference | Title | ICLL | International Convention on Load Lines, 1966 | IMO MODU Code 1989 | Code for the Construction and Equipment of
Mobile Offshore Drilling Units, 1989 | ISO 281 | Rolling bearings - Dynamic load ratings and
rating life | ISO 898 | Mechanical Properties of Fasteners | ISO 8861 | Engine-room ventilation in diesel-engined ships | SOLAS | 1974 SOLAS International Convention for the
Safety of Life at Sea | ISO 15609-1 | Specification and Approval of Welding Procedures
for Metallic Materials - Part 3: Welding Procedure Tests for the
Arc Welding of Steels | ISO 5817 | Arc-welded joints in steel - Guidance on quality
levels for imperfections | |
Ch.1 Sec.1 C
| Table C1 Informative references | |||||||||||||||||||||||||||||||||
| No. | Title | ASME B31.3 | Chemical Plant and Petroleum Refinery Piping | ASTM D3806 | Standard Test Method of Small-Scale | Evaluation of Fire-Retardant Paints (2-Foot Tunnel Method) DNV-OS-E101 | Drilling Plant | DNV-OS-E201 | Hydrocarbon Production Plant | DNV Standard for | Certification No. 2.22 Lifting Appliances | EN 12238 | Ventilation for Buildings - Air Terminal Devices-
Aerodynamic Testing and Rating for Mixed Flow Application | EN 12239 | Fire Protection Equipment - Self Contained
Smoke Alarms | ENV 12097 | Ventilation for buildings - Ductwork - Requirements
for ductwork components to facilitate maintenance of ductwork systems | IMO Resolution A.653(16) | Recommendation on Improved Fire Test Procedures
for Surface Flammability of Bulkhead, Ceiling and Deck Finish Materials | IMO Resolution A.753(18) | Guidelines for the Application of Plastic Pipes
on Ships | ISO 75 | Plastics - Determination of temperature of
deflection under load | ISO 1127 | Stainless steel tubes - Dimensions, tolerances
and conventional masses per unit length | ISO 1461 | Hot dip galvanized coatings on fabricated iron
and steel articles - Specifications and test methods | ISO 8861 | Shipbuilding - Engine-room ventilation in diesel-engined
ships - Design requirements and basis of calculations | UKOOA | Specification and Recommended Practice for
use of GRP piping offshore | USCG | PFM 1-98 Policy File Memorandum on the Fire Performance
Requirements for Plastic Pipe per IMO Resolution A.753(18). | |
(SOLAS Reg. II-1/3.16)
Ch.1 Sec.1 D
205 Machinery spaces of category A: Those
spaces and trunks to such spaces which contain:
| — | internal combustion machinery used for main propulsion; or |
| — | internal combustion machinery used for purposes other than main propulsion where such machinery has in the aggregate a total power output of not less than 375 kW; or |
| — | any oil-fired boiler or oil fuel unit. |
(SOLAS Reg. II-1/3.17)
Ch.1 Sec.1 D
206 Machinery Room: Room
in which major items of equipment are installed. The term is used
instead of Machinery Space on installations which are non-self propelled
or fixed. Depending on the equipment involved requirements will
be similar to those for either Machinery
Space or Machinery Space
of Category A.
Ch.1 Sec.1 D
207 Marine piping: Piping
serving the marine systems on an offshore unit and which is not
primarily intended for operation in drilling or hydrocarbon production
service or dedicated auxiliary systems.
Marine piping systems include the following:
| — | ballast system |
| — | bilge system |
| — | drains system |
| — | air/overflow systems |
| — | sounding system |
| — | cooling system |
| — | lubricating oil system |
| — | fuel oil system |
| — | thermal oil system |
| — | feed water and condensate systems |
| — | steam system |
| — | hydraulic system |
| — | pneumatic system |
| — | firewater system. |
Ch.1 Sec.1 D
| Table D1 System availability | |||||||||
| System category | Repair time | Continuous availability (R0) | None | High availability (R1) | 30 s | Manual system restoration (R2) | 10 minutes | Repairable systems (R3) | 3 hours | |
See also DNV-OS-D202 Ch.2 Sec.1 B for more detailed definition.
Ch.1 Sec.1 D
212 Self-elevating unit: A
unit with movable legs capable of raising its hull above the surface
of the sea.
Ch.1 Sec.1 D
213 Ship-shaped unit: A
unit with a ship- or barge-type displacement hull of single or multiple
hull construction intended for operation in the floating condition.
Ch.1 Sec.1 E
| Table E1 Abbreviations | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Abbreviation | Full text | ABS | Acrylonitrile Butadiene Styrene | AGMA | American Gear Manufacturers Association | ANSI | American National Standards Institute | API | American Petroleum Institute | ASA | American Standards Association | ASME | American Society of Mechanical Engineers | BS | British Standard (issued by British Standard
Institution) | DIN | Deutsches Institut für Normung e.V. | DNV | Det Norske Veritas | EEMUA | Engineering Equipment and Materials Users Association | EN | European Norm | GMAW | Gas Metal Arc Welding | GRE | Glass Fibre Reinforced Epoxy | GRP | Glass Fibre Reinforced Polyester | GTAW | Gas Tungsten Arc Welding | HVAC | Heating, Ventilation and Air Conditioning | ICLL | International Convention on Load Lines | IMO | International Maritime Organization | ISO | International Organization for Standardization | LEL | Lower Explosion Limit | LNG | Liquefied Natural Gas | MPI | Magnetic Particle Inspection | MT | Magnetic Particle Testing | NDT | Non-Destructive Testing | NFPA | National Fire Protection Association | OS | Offshore Standard | OSS | Offshore Service Specification | PT | dye-Penetrant Testing | PWHT | Post Weld Heat Treatment | RP | Recommended Practice | RT | Radiographic Testing | SMACNA | Sheet Metal and Air Conditioning Contractors
National Association | TBK | Norwegian Pressure Vessel Committee | TEMA | Tubular Exchangers Manufacturers Association | TR | Test Report | UKOOA | United Kingdom Offshore Operators Association | USCG | U.S. Coast Guard | UT | Ultrasonic Testing | WPQT | Welding Procedure Qualification Test | WPS | Welding Procedure Specification | WPT | Welding Production Test | |
Ch.1 Sec.1 E
| Table E2 Symbols | |||||||||||||||||||||||||||
| Symbol | Definition | T1 | nominal wall thickness | T0 | strength thickness in mm | T | minimum required wall thickness in mm | C | corrosion allowance in mm | B | bending allowance in mm | st | permissible stress in N/mm2 | sb | specified minimum tensile strength of the material
in N/mm2 at
20ºC | s ft | specified minimum yield stress or 0.2% proof
stress of the material in N/mm at design material temperature | p | design pressure in bar | D | outer diameter of pipe in mm | sb100000 | average value for stress to rupture after 100
000 hours at design material temperature | a | percentage negative manufacturing tolerance | e | strength ratio | |
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