Concurrent Surveys

Concurrent Surveys

Definition(s)

Concurrent Surveys

Surveys required to be concurrently completed shall have the same date of completion. A survey required to be carried out in conjunction with or carried out as part of another survey shall be completed on or before the completion of the other survey, however, within the time window for that survey. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
Coating Conditions

Coating Conditions

Definition(s)

Coating Conditions

— “GOOD”: condition with only minor spot rusting — “FAIR”: condition with local breakdown at edges of stiffeners and weld connections and/or light rusting over 20% or more of areas under consideration, but less than as defined for POOR condition — “POOR”: condition with general breakdown of coating over 20% or more of areas or hard scale at 10% or more of areas under consideration. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
Close-up Examination

Close-up Examination

Definition(s)

Close-up Examination

An examination where the details of structural components are within the close visual inspection range of the surveyor, i.e. preferably within reach of hand. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
Class

Class

Definition(s)

Class

Class is assigned to and will be retained by vessels complying with applicable requirements of the Society's rules. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
Certification of Materials and Components

Certification of Materials and Components

Definition(s)

Certification of Materials and Components

The activity of ensuring that materials, components and systems used in vessels to be classed by the Society comply with the rule requirements.The scope of classification re-quires that specified materials, components and systems intended for the vessel are certified. Depending on the categorisation, certification may include both plan approval and survey during production and/or of the final product. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
Builder

Builder

Definition(s)

Builder

Signifies the party contracted to build a vessel in compliance with the Society's rules certificate a document confirming compliance with the Society's rules or with other rules and regulations for which the Society has been authorized to act. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
Approval

Approval

Definition(s)

Approval

Denotes acceptance by DNV GL of documentation showing design solutions, arrangements and equipment that complies with the Rules Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
HDG

HDG

Definition(s)

HDG

Hot-dip galvanized. Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
ASCC

ASCC

Definition(s)

ASCC

Alkaline stress corrosion cracking Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Type 13Cr

Type 13Cr

Definition(s)

Type 13Cr

Martensitic stainless steel alloys with nominal 13 % Cr mass fraction alloying. EXAMPLE UNS S41000; UNS S41500. Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
pH Stabilization

pH Stabilization

Definition(s)

pH Stabilization

Increasing the bulk pH by addition of a suitable chemical to reduce CO2 corrosion in hydrocarbon systems with condensing water Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Operating Temperature

Operating Temperature

Definition(s)

Operating Temperature

Temperature to which a component is subjected during normal operation. Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Onshore

Onshore

Definition(s)

Onshore

Inland area with a non-chloride-containing atmosphere. Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Maximum Operating Temperature

Maximum Operating Temperature

Definition(s)

Maximum Operating Temperature

Maximum temperature to which a component is subjected, including during deviations from normal operations, such as start-up/shutdown. Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Marine Atmosphere

Marine Atmosphere

Definition(s)

Marine Atmosphere

Atmosphere over and near the sea NOTE A marine atmosphere will extend a certain distance inland, depending on topography and prevailing wind direction. It is heavily polluted with sea-salt aerosols (mainly chlorides). [ISO 12944-2:1998, definition 3.7.4] Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Liquid Metal Embrittlement

Liquid Metal Embrittlement

Definition(s)

Liquid Metal Embrittlement

Form of cracking caused by certain liquid metals coming into contact with specific alloys Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Hydrogen Stress Cracking

Hydrogen Stress Cracking

Definition(s)

Hydrogen Stress Cracking

Cracking that results from the presence of hydrogen in a metal and tensile stress (residual and/or applied) NOTE HSC describes cracking in metals that are not sensitive to SSC but which can be embrittled by hydrogen when galvanically coupled, as the cathode, to another metal that is corroding actively as an anode. The term “galvanically induced HSC” has been used for this mechanism of cracking. [ISO 15156-1:2009, definition 3.13] Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Hydrogen-induced cracking

Hydrogen-induced cracking

Definition(s)

Hydrogen-induced cracking

Planar cracking that occurs in carbon and low alloy steels when atomic hydrogen diffuses into the steel and then combines to form molecular hydrogen at trap sites. NOTE Cracking results from the pressurization of trap sites by hydrogen. No externally applied stress is needed for the formation of hydrogen-induced cracks. Trap sites capable of causing HIC are commonly found in steels with high impurity levels that have a high density of planar inclusions and/or regions of anomalous microstructure (e.g. banding) produced by segregation of impurity and alloying elements in the steel. This form of hydrogen-induced cracking is not related to welding. [ISO 15156-1:2009, definition 3.12] Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Glass-fibre-reinforced plastic

Glass-fibre-reinforced plastic

Definition(s)

Glass-fibre-reinforced plastic

Composite material made of thermosetting resin and reinforced with glass fibres. Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Fugacity

Fugacity

Definition(s)

Fugacity

Non-ideal partial pressure that a component in a mixture exerts in the vapour phase when in equilibrium with the liquid mixture. NOTE The fugacity factor depends on the temperature and the total pressure. Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
Free-machining steel

Free-machining steel

Definition(s)

Free-machining steel

Steel composition to which elements such as sulfur, selenium or lead have been intentionally added to improve machinability. Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
End User

End User

Definition(s)

End User

Owner or organization that is responsible for operation of an installation/facility. Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
AFP (active fire protection)

AFP (active fire protection)

Definition(s)

AFP (active fire protection)

Equipment, systems, and methods which, following initiation, can be used to control, mitigate, and extinguish fires Source: ISO 13702:2015, Petroleum and natural gas industries — Control and mitigation of fires and explosions on offshore production installations — Requirements and guidelines, Second Edition, August 2015. Global Standards
Design Review

Design Review

Definition(s)

Design Review

Documented, comprehensive and systematic examination of a design to evaluate its capability to fulfill requirements for quality, identify problems and propose the development of solutions NOTE 1 In the context of this International Standard, the basis for the design review is the functional specification. NOTE 2 A service is also designed, and can be reviewed in the same manner. Source: ISO 13880:1999, Petroleum and natural gas industries — Content and drafting of a technical specification, First Edition, October 1999. Global Standards
Type Test

Type Test

Definition(s)

Type Test

Test performed to provide evidence that the design meets the requirements of the functional specification. Source: ISO 13880:1999, Petroleum and natural gas industries — Content and drafting of a technical specification, First Edition, October 1999. Global Standards
Routine Test

Routine Test

Definition(s)

Routine Test

Test performed to provide evidence that the product, process or service or part thereof is in compliance with the relevant requirements of the technical specification. Source: ISO 13880:1999, Petroleum and natural gas industries — Content and drafting of a technical specification, First Edition, October 1999. Global Standards
Manufacturing Plan

Manufacturing Plan

Definition(s)

Manufacturing Plan

Document setting out the specific manufacturing practices, technical resources and sequences of activities relevant to the production of a particular product including any specified acceptance criteria at each stage NOTE 1 This plan should make reference to the applicable methods, procedures and work instructions. NOTE 2 In case of services, the manufacturing plan is often called a Service Plan. Source: ISO 13880:1999, Petroleum and natural gas industries — Content and drafting of a technical specification, First Edition, October 1999. Global Standards
Material Requirements

Material Requirements

Definition(s)

Material Requirements

Document listing the materials required and providing, when relevant, chemical composition, mechanical and physical properties, and any other data necessary to define materials required to provide the product, process or service to the functional specification NOTE 1 The document may also list the applicable treatments, welding procedures and machining processes. NOTE 2 The document should contain all available information regarding toxicity and any other health, safety and environment related aspects. Source: ISO 13880:1999, Petroleum and natural gas industries — Content and drafting of a technical specification, First Edition, October 1999. Global Standards
Technical Drawings

Technical Drawings

Definition(s)

Technical Drawings

Drawings showing the required dimensions, surface finishes, deviations of form and position, tolerances and all other details required to provide the product, process or service. Source: ISO 13880:1999, Petroleum and natural gas industries — Content and drafting of a technical specification, First Edition, October 1999. Global Standards
Design Process

Design Process

Definition(s)

Design Process

Process of converting the requirements of the functional specification into the technical specification. Source: ISO 13880:1999, Petroleum and natural gas industries — Content and drafting of a technical specification, First Edition, October 1999. Global Standards