Accidental Situation

Accidental Situation

Definition(s)

Accidental Situation

Design situation involving exceptional conditions of the structure or its exposure.
  • EXAMPLE Impact, fire, explosion, loss of intended differential pressure).
Source: ISO 19900:2013, Petroleum and natural gas industries – General requirements for offshore structures. Global Standards

Accidental Situation

Exceptional situation of the structure. EXAMPLE Impact; fire; explosion; local failure; loss of intended differential pressure (e.g. buoyancy). Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global Standards
Accommodation

Accommodation

Definition(s)

Accommodation

Place where personnel onboard sleep and spend their off-duty time.
  • Note: 1 to entry: It can include dining rooms, recreation rooms, lavatories, cabins, offices, sickbay, living quarters, galley, pantries, and similar permanently enclosed spaces.
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

Accommodation

Accommodation means a cabin or other covered or enclosed place intended to carry persons. Source: Mobile Offshore Drilling Units, 46 CFR 107-109 (2013). Regulations  

Accommodation

Place where personnel onboard sleep and spend their off-duty time. NOTE It may include dining rooms, recreation rooms, lavatories, cabins, offices, sickbay, living quarters, galley, pantries and similar permanently enclosed spaces. Source: ISO 15544:2000, Petroleum and natural gas industries – Offshore production installations – Requirements and guidelines for emergency. Global Standards

Accommodation of Special Needs

Accommodation of Special Needs

Definition(s)

Accommodation of Special Needs

Modification of assessment methods or its administration made to account for the effects of a disability without altering the validity of the assessment. Source: ISO/IEC TS 17027:2014, Conformity assessment – Vocabulary related to competence of persons used for certification of persons, Global Standards
Accommodation Space

Accommodation Space

Definition(s)

Accommodation space

Accommodation space includes, sleeping, mess, hospital, recreational, toilet, washing and shower spaces, and corridors. Source: Mobile Offshore Drilling Units, 46 CFR 107-109 (2013). Regulations  

Accommodation space

Accommodation spaces are those used for public spaces, corridors, lavatories, cabins, offices, hospitals, cinemas, games and hobbies rooms, pantries containing no cooking appliances and similar spaces. ‘Public spaces’ are those portions of the accommodation which are used for halls, dining rooms, lounges and similar permanently enclosed spaces. Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 7, Safety Systems, Hazardous Areas and Fire, June 2013, Lloyd’s Register, Global Standards
Accommodation Spaces

Accommodation Spaces

Definition(s)

Accommodation Spaces

Accommodation spaces are those used for public spaces, corridors, lavatories, cabins, offices, hospitals, cinemas, games and hobbies rooms, pantries containing no cooking appliances and similar spaces. Public spaces are those portions of the accommodation which are used for halls, dining rooms, lounges and similar permanently enclosed spaces. Source: IMO Resolution A.1023(26), Code for the Construction and Equipment of Mobile Offshore Drilling Units (2009 MODU Code), 2009. Global Standards  

Accommodation Spaces

Accommodation spaces are those spaces used for public spaces, corridors, lavatories, cabins, offices, hospitals, cinemas, game and hobby rooms, barber shops, pantries containing no cooking appliances and similar spaces  <Chapter II-2, part A, regulation 3>. Source: IMO Resolution MSC.99(73), amendments to the International Convention for the Safety of Life at Sea, 1974, as amended, 5 December 2000, International Maritime Organization. Legislation.
Accommodation Unit

Accommodation Unit

Definition(s)

Accommodation Unit

Accommodation unit is a support unit whose primary function is to provide accommodation for more than twelve offshore personnel who are not crew members or passengers. Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 1, Regulations, June 2013, Lloyd’s Register, Global Standards
Accountability

Accountability

Definition(s)

Accountability

An individual's formal acceptance of their obligation to justify decisions, actions or outcomes. An accountable person (manager or worker) does not necessarily implement the action or decision, but they should organize the implementation and verify that the action has been carried out as required. OMS accountability includes system ownership. This may involve responsibilities related to policies, governance, systems, administration, implementation, performance monitoring and review at the asset, business or corporate level. Source: IOGP Report No. 510, Operating Management System Framework for controlling risk and delivering high performance in the oil and gas industry, International Association of Oil & Gas Producers, June 2014. Global Standards

Accountability

Property of a system (including all of its system resources) that ensures that the actions of a system entity may be traced uniquely to that entity, which can be held responsible for its actions [11]. Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Accreditation

Accreditation

Definition(s)

Accreditation

Third-party attestation related to a conformity assessment body conveying formal demonstration of its competence to carry out specific conformity assessment tasks
  • Note: 1 to entry: Accreditation refers to conformity assessment bodies only, and not to persons.
[SOURCE: ISO/IEC 17000:2004, 5.6, modified — Note 1 to entry has been added.]. Source: ISO/IEC TS 17027:2014, Conformity assessment – Vocabulary related to competence of persons used for certification of persons, Global Standards

Accreditation

Official recognition by the body for accreditation of a natural person's or legal entity's authority to perform works in a certain sphere of compliance evaluation. Source: Federal Law on Technical Regulation, No. 184-FZ, Russian Federation, December 2002 (amended September 2010). Regulations

Accreditation

Third-party attestation related to a conformity assessment body conveying formal demonstration of its competence to carry out specific conformity assessment tasks. Source: ISO/IEC 17011:2004, Conformity assessment – General requirements for accreditation bodies accrediting conformity assessment bodies. Global Standards
Accreditation Body

Accreditation Body

Definition(s)

Accreditation Body

Authoritative body that performs accreditation.
  • NOTE: The authority of an accreditation body is generally derived from government.
Source: ISO/IEC 17011:2004, Conformity assessment – General requirements for accreditation bodies accrediting conformity assessment bodies. Global Standards  
Accreditation Body Logo

Accreditation Body Logo

Definition(s)

Accreditation Body Logo

Logo used by an accreditation body to identify itself. Source: ISO/IEC 17011:2004, Conformity assessment – General requirements for accreditation bodies accrediting conformity assessment bodies. Global Standards
Accreditation Certificate

Accreditation Certificate

Definition(s)

Accreditation Certificate

Formal document or a set of documents, stating that accreditation has been granted for the defined scope. Source: ISO/IEC 17011:2004, Conformity assessment – General requirements for accreditation bodies accrediting conformity assessment bodies. Global Standards
Accreditation Symbol

Accreditation Symbol

Definition(s)

Accreditation Symbol

Symbol issued by an accreditation body to be used by accredited CABs to indicate their accredited status.
  • NOTE: “Mark” is to be reserved to indicate direct conformity of an entity against a set of requirements.
Source: ISO/IEC 17011:2004, Conformity assessment – General requirements for accreditation bodies accrediting conformity assessment bodies. Global Standards
Accumulation

Accumulation

Definition(s)

Accumulation

Pressure increase over the maximum allowable working pressure (MAWP) of the vessel during discharge through the pressure-relief device.
  • NOTE Accumulation is expressed in units of pressure or as a percentage of MAWP or design pressure. Maximum allowable accumulations are established by pressure design codes for emergency operating and fire contingencies.
Source:API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards

Accumulation

Pressure increase over the maximum allowable working pressure or design pressure of the vessel allowed during discharge through the pressure-relief device.
  • NOTE Accumulation is expressed in units of pressure or as a percentage of MAWP or design pressure. Maximum allowable accumulations are established by pressure-design codes for emergency operating and fire contingencies.
Source: API STD 2000, Venting Atmospheric and Low-pressure Storage Tanks, Sixth Edition, November 2009. Global Standards
Accumulator

Accumulator

Definition(s)

Accumulator (Riser Tensioner)

A pressure vessel charged with gas (nitrogen generally) over liquid that is pressurized on the gas side from the tensioner high-pressure gas supply bottles and supplies high pressure hydraulic fluid to energize the riser tensioner cylinder. Source: API RP 16Q, Recommended Practice for Design, Selection, Operation and Maintenance of Marine Drilling Riser Systems, First Edition, November 1993 (Reaffirmed August 2001). Global Standards  

Accumulator (BOP)

A pressure vessel charged with gas (nitrogen) over liquid and used to store hydraulic fluid under pressure for operation of blowout preventers. Source: API RP 16Q, Recommended Practice for Design, Selection, Operation and Maintenance of Marine Drilling Riser Systems, First Edition, November 1993 (Reaffirmed August 2001). Global Standards Source: ISO 13624-1:2009, Petroleum and natural gas industries – Drilling and production equipment – Part 1:Design and operation of marine drilling riser equipment. Global Standards  

Accumulator

A pressure vessel charged with nitrogen or other inert gas and used to store hydraulic fluid under pressure for operation of BOPs. Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards  

Accumulator

A pressure vessel charged with inert gas and used to store hydraulic fluid under pressure. Source: API RP 96, Deepwater Well Design and Construction, First Edition, March 2013. Global Standards Source: API STD 53, Blowout Prevention Equipment Systems for Drilling Wells, Upstream Segment, Fourth Edition, November 2012. Global Standards  

Accumulator

A pressure vessel charged with non-reactive or inert gas used to store hydraulic fluid under pressure for operation of blowout preventers. Source: API SPEC 16D, Specification for Control Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment, Upstream Segment, Second Edition, July 2004. Global Standards  

Accumulator (Riser Tensoiner)

Pressure vessel charged with gas (generally nitrogen) over liquid that is pressurized on the gas side from the tensioner high-pressure gas supply bottles and supplies high-pressure hydraulic fluid to energize the riser tensioner cylinder. Source: ISO 13624-1:2009, Petroleum and natural gas industries – Drilling and production equipment – Part 1:Design and operation of marine drilling riser equipment. Global Standards  
Accumulator Bank

Accumulator Bank

Definition(s)

Accumulator Bank

An assemblage of multiple accumulators sharing a common manifold. Source: API SPEC 16D, Specification for Control Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment, Upstream Segment, Second Edition, July 2004. Global Standards
Accumulator Precharge

Accumulator Precharge

Definition(s)

Accumulator Precharge

An initial inert gas charge in an accumulator, which is further compressed when the hydraulic fluid is pumped into the accumulator, thereby storing potential energy. Source: API SPEC 16D, Specification for Control Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment, Upstream Segment, Second Edition, July 2004. Global Standards
Accumulator system

Accumulator system

Definition(s)

Accumulator System

Pore pressure in excess of that pressure resulting from the hydrostatic pressure exerted by a vertical column of water with salinity normal for the geographic area. Source: API RP 64, Recommended Practice for Diverter Systems Equipment and Operations, Second Edition, November 2001 (March 1, 2007). Global Standards
Accuracy

Accuracy

Definition(s)

Accuracy

In this part of ISO 10426, calibrating an instrument refers to assuring the accuracy of the measurement. Accuracy is the degree of conformity of a measurement of a quantity to its actual or true value. Accuracy is related to precision, or reproducibility, of a measurement. Precision is the degree to which further measurements or calculations will show the same or similar results. Precision is characterized in terms of the standard deviation of the measurement. The results of calculations or a measurement can be accurate, but not precise, precise but not accurate, neither or both. A result is valid if it is both accurate and precise. Source: API SPEC 10A, Specification for Cements and Materials for Well Cementing, Twenty-fourth Edition, December 2010. Global Standards  
ACFM

ACFM

Definition(s)

ACFM

Alternating current field measurement. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
ACGIH

ACGIH

Definition(s)

ACGIH

American Conference of Governmental Industrial Hygienists. Source: API RP 49, Recommended Practice for Drilling and Well Servicing Operations Involving Hydrogen Sulfide, Third Edition, May 2001. Global Standards Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global Standards
Acidizing

Acidizing

Definition(s)

Acidizing

“Acidizing” means the act of pumping an acidic solution into a wellbore to remove any materials from the perforations, pipe, and walls of the producing formation and includes the act of pumping the substance into formations to improve permeability. Source: Oil and Gas Drilling and Servicing Operations, Michigan Administrative Code R 408, February 8, 2013. Regulations

Acidizing

The act of pumping an acidic solution into a wellbore to remove materials from the perforations, pipe, and walls of the producing formation or pumping the solution into formations to improve permeability. Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards
ACL

ACL

Definition(s)

ACL

Access control list. Source:  DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. Global Standards
Acoustic Control System

Acoustic Control System

Definition(s)

Acoustic Control System

A subsea control system that uses coded acoustic signals for communications and is normally used as an emergency backup having control of a few selected critical functions. Source: API SPEC 16D, Specification for Control Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment, Upstream Segment, Second Edition, July 2004. Global Standards
ACP

ACP

Definition(s)

ACP

Access Control Point.

Source: API RP 781 Security Plan Methodology for the Oil and Natural Gas Industries.1st Ed. September 2016. Global Standards

ACP

Annular casing pressure. Source: API STD 65 – Part 2, Isolating Potential Flow Zones During Well Construction, Upstream Segment, Second Edition, December 2010. Global Standards 
ACS

ACS

Definition(s)

ACS

American Chemical Society. Source: API SPEC 13A, Specification for Drilling Fluids Materials, Eighteenth Edition, February 2010. Global Standards  

ACS

Anti-collision (zone management) system. Source: NORSOK D-001, Drilling facilities, Rev. 3, December 2012. Global Standards
ACS Reagent Grade

ACS Reagent Grade

Definition(s)

ACS Reagent Grade

Chemical meeting the purity standards specified by the American Chemical Society (ACS). Source: API RP 13B-1, Recommended Practice for Field Testing Water-based Drilling Fluids, Fourth Edition, March 2009. Global Standards  

ACS Reagent Grade

Chemicals that meet purity standards as specified by the American Chemical Society (ACS). Source: API SPEC 13A, Specification for Drilling Fluids Materials, Eighteenth Edition, February 2010. Global Standards
Act

Act

Definition(s)

Act

“Act” means the Canada Oil and Gas Operations Act (Loi). Source: Canada Oil and Gas Installations Regulations, SOR/96-111, Canada, current to May 1, 2014. Regulations Source: Canada Oil and Gas Drilling and Production Regulations, SOR/2009-315, February 2013. Regulations Source: Canada Oil and Gas Geophysical Operations Regulations, SOR/96-117, Canada, current to April 29, 2013. Regulations Source: Canada Oil and Gas Installations Regulations, SOR/96-118, February 2013. Regulations Source: Offshore Waste Treatment Guidelines, The Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada-Nova Scotia Offshore Petroleum Board, and National Energy Board, Canada, December 15, 2010. Regulatory Guidance

ACT

The assumed malevolent scenario under study.

Source:API STANDARD 780, Security Risk Assessment Methodology for the Petroleum and Petrochemical Industries, First Edition, May 2013. Global Standards  

Act

“Act” means the Oil and Gas Production and Conservation Act (Loi). Source: Canada Oil and Gas Diving Regulations, SOR/88-600, February 2013. Regulations  

Act

“Act” means Part II of the Canada Labour Code (Loi). Source: Canada Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, February 2013. Regulations Source: Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, Canada, current to April 29, 2013. Regulations  

Act

ACT shall mean the Oil and Gas Conservation Act of the State of Colorado. Source: Oil and Gas Conservation Commission, Practice and Procedure, Code of Colorado Regulations, 2 CCR 404-1, February 2013. Regulations  

Act

“ACT” means automatic custody transfer. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. Regulations  

Act

Act means the OCS Lands Act, as amended (43 U.S.C. 1331 et seq.). Source: Oil and Gas and Sulphur Operations in the Outer Continental Shelf, 30 CFR 250 (2013). Regulations  

Act

Act means the Outer Continental Shelf Lands Act of 1953 (43 U.S.C. 1331 et seq. ), as amended by the Outer Continental Shelf Lands Act Amendments of 1978 (Pub. L. 95-372). Source: Outer Continental Shelf Activities, 33 CFR 140-147 (2013). Regulations  

Act

"Act" means State of Wyoming Occupational Health and Safety Act, as amended 1992. Source: State of Wyoming Occupational Safety and Health Rules and Regulations for Oil and Gas Well Drilling, Revised January 8, 2013. Regulations  

Act

Act means the Health and Safety in Employment Act 1992. Source: Health and Safety in Employment (Petroleum Exploration and Extraction) Regulations 2013, SR 2013/208, New Zealand, as of May 2013. Regulations  

ACT

Automatic custody transfer. API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2, Third Edition, December 2012, Global Standards  

Act

Act—The Oil and Gas Act (58 P. S. § §  601.101—601.605). Source: Oil and Gas Wells, Pennsylvania Code, Title 25, Chapter 78, December 2012. Regulations

Act

Act means the Canada-Nova Scotia Offshore Petroleum Resources Accord Implementation Act. Source: Nova Scotia Offshore Area Petroleum Geophysical Operations Regulations, SOR/95-144, Canada, current to May 31, 2012. Regulations Source: Nova Scotia Offshore Certificate of Fitness Regulations, SOR/95-187, Canada, current to May 31, 2012. Regulations Source: Nova Scotia Offshore Area Petroleum Diving Regulations, SOR/95-189, Canada, current to May 31, 2012. Regulations Source: Nova Scotia Offshore Petroleum Installations Regulations, SOR/95-191, Canada, current to May 31, 2012. Regulations Source: Nova Scotia Offshore Petroleum Drilling and Production Regulations, SOR/2009-317, Canada, current to May 31, 2012. Regulations Source: Drilling and Production Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, March 31, 2011. Regulatory Guidance Source:  Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. Regulations  

Act

Act means the Canada Newfoundland Atlantic Accord Implementation Act. Source: Drilling and Production Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, March 31, 2011. Regulatory Guidance  

Act

The Accord Acts and the Canada Oil and Gas Operations Act. Source: Environmental Protection Plan Guidelines, The Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada-Nova Scotia Offshore Petroleum Board, and National Energy Board, Canada, March 31, 2011. Regulatory Guidance  

Act

Act means the Offshore Petroleum and Greenhouse Gas Storage Act 2006. Source: Offshore Petroleum and Greenhouse Gas Storage (Environment) Regulations 2009 (Statutory Rules 1999 No. 228 as amended), Australia, prepared on 1 January 2012. Regulations Source: Offshore Petroleum and Greenhouse Gas Storage (Resource Management and Administration) Regulations 2011 (Select Legislative Instrument 2011 No. 54 as amended), Australia, prepared on 1 January 2012. Regulations Source: Offshore Petroleum and Greenhouse Gas Storage (Safety) Regulations 2009 (Select Legislative Instrument 2009 No. 382 as amended), Australia, prepared on 1 January 2012. Regulations  

This Act

This Act includes the regulations. Source: Offshore Petroleum and Greenhouse Gas Storage Act 2006, Australia, amended 2012. Legislation  

Act, The

The enabling legislation that creates NOPSEMA, provides its functions and powers for its OHS inspectors and imposes duties on those who are regulated by NOPSEMA. The Act has changed over time:
  • From 1st January 2005 to 30th June 2008: The Petroleum (Submerged Lands) Act 1967
  • From 1st July 2008 to 20th November 2008 The Offshore Petroleum Act 2006
  • From 21st November 2008: The Offshore Petroleum and Greenhouse Gas Storage Act 2006
It may also refer to the State PSLA or Territory PSLA when this is relevant. Source: NOPSEMA Guideline – Glossary – Regulatory Operations, N-09000-GL0326, Australia, Revision 5, December 2011. Regulatory Guidance  

Act

The Canada Oil and Gas Operations Act, the Canada-Nova Scotia Atlantic Accord Implementation Act and the Canada-Newfoundland and Labrador Atlantic Accord Implementation Act. Source: Safety Plan Guidelines, The Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada-Nova Scotia Offshore Petroleum Board, and National Energy Board, Canada, March 31, 2011. Regulatory Guidance

 

Act

Act means the Health and Safety in Employment Act 1992. Source: Health and Safety in Employment (Mining Administration) Regulations 1996, SR 1996/220, New Zealand, as of January 2011. Regulations  

Act

“Act” means the Oilfields (Regulation and Development) Act, 1948 (53 of 1948. Source: Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, India, 18th June 2008. Regulations  

Act

Act: Mijnbouwwet. Source: Mining Decree of the Netherlands, Netherlands, 2003 (as amended in 2007).  Legislation  

Act

“Act” means the Petroleum Act, 1934 (30 of 1934). Source: The Petroleum Rules, 2002, India, 13th March 2002. Regulations  

Act

“Act” means the Petroleum Act, 1934 (30 of 1934. Source: The Petroleum Rules, 1976, India, 1976. Regulations
Action

Action

Definition(s)

Action

External load applied to the structure (direct action) or an imposed deformation or acceleration (indirect action). EXAMPLE An imposed deformation can be caused by fabrication tolerances, settlement, temperature change or moisture variation. NOTE An earthquake typically generates imposed accelerations. [ISO 19900:2002, 2.1] Source: API RP 2MOP, Marine Operations, Upstream Segment, First Edition, July 2010.  Global Standards Source: ISO 19900:2013, Petroleum and natural gas industries – General requirements for offshore structures. Global Standards    

Action

External load applied to the structure (direct action) or an imposed deformation or acceleration (indirect action). EXAMPLE An imposed deformation can be caused by fabrication tolerances, settlement, temperature change or moisture variation. NOTE An earthquake typically generates imposed accelerations. [ISO 19900:2002] Source: ISO 19901-7:2013, Petroleum and natural gas industries – Specific requirements for offshore structures – Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units. Global Standards  

Action

External load applied to the structure (direct action) or an imposed deformation or acceleration (indirect action). EXAMPLE An imposed deformation can be caused by fabrication tolerances, settlement, temperature change or moisture variation. NOTE An earthquake typically generates imposed accelerations. [ISO 19900:2002, definition 2.1]. Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global Standards
Action Effect

Action Effect

Definition(s)

Action Effect

Effect of actions on structural components. [ISO 19900:2002].
  • EXAMPLE Internal forces, moments, stresses, strains, rigid body motions or elastic deformations.
Source: ISO 19901-7:2013, Petroleum and natural gas industries – Specific requirements for offshore structures – Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units. Global Standards  

Action Effect

Effect of actions on structural components.
  • EXAMPLE   Internal force, moment, stress or strain.
Source: ISO 19900:2013, Petroleum and natural gas industries – General requirements for offshore structures. Global Standards  

Action Effect

Effect of actions on structural components.
  • EXAMPLE Internal forces, moments, stresses, strains, rigid body motions or elastic deformations. [ISO 19904-1:2006, 3.5].
Source: API RP 2MOP, Marine Operations, Upstream Segment, First Edition, July 2010. Global Standards
Action Integral

Action Integral

Definition(s)

Action Integral

The joule or ohmic heating energy dissipated per unit resistance at the lightning attachment point. The action integral is measured in A2s (amperes-squared seconds), which is the same as JΩ-1 (joules per ohm) (Rakov and Uman, Lightning: Physics and Effects, p. 277). Source: API RP 545 Recommended Practice for Lightning Protection of Aboveground Storage Tanks for Flammable or Combustible Liquids, First Edition, October 2009. Global Standards