Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Safety Functions
Definition(s)
Safety Functions
Safety functions include a) sectioning of the process, b) fire detection, c) gas detection, d) ignition source disconnection, e) maintaining overpressure in unclassified rooms, f) starting and stopping fire pumps, both manually and automatically, g) active fire-fighting h) active smoke control, i) process safety system, j) securing of wells, k) depressurisation, l) general alarm and evacuation alarm, m) production and distribution of emergency power, n) emergency lighting, o) emergency bilging, p) ballasting for floating facilities, q) maintenance of correct pressure, humidity, temperature and gas composition in diving facilities. Source: Guidelines Regarding the Facilities Regulations, Norway, updated December 2012. Regulatory GuidanceSafety Functions
Physical measures that reduce the probability of a hazard and accident situation occurring, or that limit the consequences of an accident. Source: Regulations relating to design and outfitting of facilities, etc. in the petroleum activities (the Facilities Regulations), Norway, April 2010 (amended December 2012). Regulations Source: Regulations Relating to Technical and Operational Matters at Onshore Facilities in the Petroleum Activities, etc. (The Technical and Operational Regulations) Norway, April 2010 (amended December 2010). RegulationsSafety Functions
Safety functions can be a) process sectionings b) fire detection, c) gas detection, d) ignition source disconnection, e) maintaining overpressure in unclassified rooms, f) starting and stopping fire pumps, both manually and automatically, g) active fire-fighting h) active smoke control, i) securing processes, j) depressurisation, k) general alarm and evacuation alarm, l) production and distribution of emergency power, m) emergency lighting. Source: Guidelines Regarding the Technical and Operational Regulations, Norway, updated December 2012. Regulatory GuidanceSafety Head
Definition(s)
Safety Head
Upper closure device of the secondary barrier. Source: NORSOK D-002, Well intervention equipment, Rev. 2, June 2013. Global StandardsSafety Instrumented System
Definition(s)
Safety Instrumented System
System composed of sensors, logic solvers, and final control elements for the purpose of taking the process to a safe state when predetermined conditions are met.- NOTE Other terms commonly used for a SIS include emergency shutdown system (ESD, ESS), safety shutdown system (SSD), and safety interlock system (see E.3.3.1).
Safety Instrumented System
ISA S84.01 defines a safety instrumented system as a “system composed of sensors, logic solvers, and final control elements for the purpose of taking the process to a safe state when predetermined conditions are violated. Other terms commonly used include emergency shutdown system (ESD, ESS), safety shutdown system (SSD), and safety interlock system.” HIPS also fit the definition of a safety instrumented system. Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global StandardsSafety Instrumented System
System used to implement one or more safety-instrumented functions [2].- Note: A safety-instrumented system is composed of any combination of sensor(s), logic solver(s), and actuator(s).
Safety Integrity
Definition(s)
Safety Integrity
ability of a safety instrumented system to perform the required safety instrumented functions as and when required Note 1 to entry: This definition is equivalent to the dependability of the SIS (Safety Instrumented System) with regard to the required safety instrumented function. Dependability, being often understood as an economical rather a safety concept, has not been used to avoid confusion. Note 2 to entry: The term “integrity” is used to point out that a SIS aims to protect the integrity of the operators as well as of the process and its related equipment from hazardous events. Source: ISO/TR 12489:2013(E), Global StandardsSafety Integrity
The attribute of an information system when it performs its intended function in an unimpaired manner, free from deliberate or inadvertent unauthorized manipulation of the system. From: CNSSI 4009. Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global StandardsSafety Issue
Definition(s)
Safety Issue
An issue that encompasses one or more contributing factors and/or other unsafe conditions. Source: IMO resolution A.1075(28), Guidelines to assist investigators in the implementation of the Casualty Investigation Code, 4 December 2013, Regulatory GuidanceSafety Joint
Definition(s)
Safety Joint
A device to allow an intentional controlled separation of the work string or bottomhole assembly (BHA). Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global StandardsSafety Management
Definition(s)
Safety Management
System the elements of an operator’s management system dedicated to safety management, whether or not these management elements are incorporated in or separate from the overall management system. 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 GuidanceSafety Management Certificate
Definition(s)
Safety Management Certificate
Safety Management Certificate means a document issued to a ship which signifies that the Company and its shipboard management operate in accordance with the approved safety management system. Source: IMO Resolution MSC.104(73), amendments to the International Management Code for the Safe Operation of Ships and for Pollution Prevention (International Safety Management (ISM) Code), 5 December 2000, International Maritime Organization. LegislationSafety Management System
Definition(s)
Safety Management System
"Safety Management system" means a structured and documented system enabling company personnel to implement effectively the company safety and environmental protection policy, as defined in paragraph 1.1 of International Safety Management Code. Source: IMO Resolution MEPC.213(63), 2012 Guidelines for the development of a Ship Energy Efficiency Management Plan (SEEMP), 2 March 2012, International Maritime Organization, Regulatory GuidanceSafety Management System
Safety Management System means a structured and documented system enabling Company personnel to implement effectively the Company safety and environmental protection policy. Source: IMO Resolution MSC.104(73), amendments to the International Management Code for the Safe Operation of Ships and for Pollution Prevention (International Safety Management (ISM) Code), 5 December 2000, International Maritime Organization. LegislationSafety Management System
A Safety Management System comprises all policies, objectives, roles, responsibilities accountabilities, codes, standards, communications, processes, procedures, tools, data and documents for managing safe operation of the facility. In the context of the OPGGS(S) Regulations, the SMS comprises all these aspects with a strong focus on the prevention, reduction or mitigation of MAEs. The SMS is not just documentation but is the actual implementation of processes, systems, procedures and practices on the facility. Source: NOPSEMA Guidance Note: Safety Management Systems, N04300-GN1052, Australia, Revision 0, December 2012. Regulatory GuidanceSafety Management System
Safety management system, for a facility, means a system for managing occupational health and safety at the facility. Source: Offshore Petroleum and Greenhouse Gas Storage (Safety) Regulations 2009 (Select Legislative Instrument 2009 No. 382 as amended), Australia, prepared on 1 January 2012. RegulationsSafety Management System
Safety management system means a system— (a) to assure the safe operation of an installation through the effective management of hazards, including major accident hazards; and (b) that addresses the matters set out in Schedule 1. Source: Health and Safety in Employment (Petroleum Exploration and Extraction) Regulations 2013, SR 2013/208, New Zealand, as of May 2013. RegulationsSafety Margin
Definition(s)
Safety Margin
Safety margin means adjustments made to compensate for uncertainties in the methods and assumptions used to evaluate the alternative design, e.g. in the determination of performance criteria or in the engineering models used to assess the consequences of fire. Source: IMO MSC.1/Circ.1002, Guidelines on alternative design and arrangements for fire safety, 26 June 2001, International Maritime Organization. Regulatory GuidanceSafety Margin
Safety margin means adjustments made to compensate for uncertainties in the methods and assumptions used to evaluate the alternative design, e.g. in the determination of performance criteria or in the engineering models used to assess the consequences of a casualty. Source: IMO MSC.1/Circ.1212, Guidelines on alternative design and arrangements for SOLAS chapters II-1 and III, 15 December 2006, International Maritime Organization. Regulatory GuidanceSafety Network
Definition(s)
Safety Network
Network that connects safety-instrumented systems for the communication of safety-related information.
Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National StandardSafety Objectives
Definition(s)
Safety Objectives
The safety goals for the design, construction, installation operation and abandonment the fixed offshore structure including acceptance criteria for the level of risk acceptable to the Owner. Source: Verification of Lifting Appliances for the Oil and Gas Industry, DNV-OSS-308, October 2010, Det Norske Veritas AS, Global StandardsSafety Officer
Definition(s)
Safety Officer
“Safety officer” means a safety officer appointed by the Board under the Accord Acts. Source: Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. RegulationsSafety Plan
Definition(s)
Safety Plan
“Safety plan” means the safety plan submitted to the Board under section 6 (plan de sécurité). Source: Canada Oil and Gas Drilling and Production Regulations, SOR/2009-315, February 2013. 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 Drilling and Production Regulations, SOR/2009-317, Canada, current to May 31, 2012. RegulationsSafety Policy
Definition(s)
Safety Policy
The overall intention and direction of an organization related to its safety performance as formally expressed by senior management. 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 GuidanceSafety Relief Valve
Definition(s)
Safety Relief Valve
Spring-loaded pressure-relief valve that can be used as either a safety valve or a relief valve depending on the application. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global StandardsSafety Report
Definition(s)
Safety Report
A “safety report”, sometimes referred to as a “safety case”, collates all the safety information into one document so that all persons on the installation are aware of the hazards and safety of the installation. It can also be made available to regulatory authorities as evidence of the safe operation of the installation. The report should be continually reviewed and updated. The safety report should describe: • The installation, processes and hazardous substances used; • The hazards and their control; • The consequences to people and the environment of potential major industrial accidents by means of systematic hazard analysis; • The organisation of the installation and management of its safety; • Emergency systems provided to mitigate the consequences of major industrial accidents. Source: Approved Code of Practice for Managing Hazards to Prevent Major Industrial Accidents, Health and Safety in Employment Act 1992, Department of Labour, New Zealand, July 1994. Regulatory GuidanceSafety Standby Vessel
Definition(s)
Safety Standby Vessel
A safety standby vessel is a sea going vessel designed, organised, equipped and maintained in such a way that she can carry out her tasks properly at all times. Source: NOGEPA Industrial Guideline No. 6, Standby Vessels, Netherlands, Version 1, June 2004. Global StandardsSafety Sub
Definition(s)
Safety Sub
Used in tubing conveyed perforating gun strings, the safety sub is the very top section that does not contain shaped charge perforators. The purpose is to place the perforator loaded guns below the rig floor when the firing head is installed to augment rig crew safety. Source: API RP 67, Recommended Practice for Oilfield Explosives Safety, Upstream Segment, Second Edition, May 2007. Global StandardsSafety System
Definition(s)
Safety System
Essential system consisting of a series of sub-systems and performing a series of essential functions (i.e. essential safety functions) preventing the use of the gangway outside its operational limitations (e.g. overload systems, break-away system, automatic release, etc.). Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global StandardsSafety System 3.1.6
System which realizes one or more safety functions. Source: ISO/TR 12489:2013(E). Global StandardsSafety System
A system that realises one or more active safety functions. Source: Regulations relating to design and outfitting of facilities, etc. in the petroleum activities (the Facilities Regulations), Norway, April 2010 (amended December 2012). Regulations Source: Regulations Relating to Technical and Operational Matters at Onshore Facilities in the Petroleum Activities, etc. (The Technical and Operational Regulations) Norway, April 2010 (amended December 2010). RegulationsSafety Systems
Definition(s)
Safety Systems
Systems provided on a platform to detect, control, and mitigate hazardous situations. NOTE Safety systems include gas detection, emergency shutdown, fire protection, and their control systems. Source:API RP 2EQ, Seismic Design Procedures and Criteria for Offshore Structures, First Edition, November 2014. Global StandardsSafety Systems
Systems, including required utilities, which are provided to prevent, detect/ warn of an accidental event/abnormal conditions and/or mitigate its effects Interpretation: The following should be considered as safety systems: — ESD, including blowdown where relevant — PSD — fire and gas detection — PA/GA — fire-fighting systems — BOP incl. control system — safety systems for essential or important services — safety systems are normally considered as “on-demand” functions. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global StandardsSafety Valve
Definition(s)
Safety Valve
Spring-loaded pressure-relief valve actuated by the static pressure upstream of the valve and characterized by rapid opening or pop action.- NOTE: A safety valve is normally used with compressible fluids.
Safety Valve (stabbing valve)
A full opening valve available for quick installation in the pipe string to prevent flow. Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global StandardsSafety Valve
“Safety valve” means a valve available for quick installation in the pipe string to prevent flow. [Mich. Admin. Code R 408 (2013)]. Source: Oil and Gas Drilling and Servicing Operations, Michigan Administrative Code R 408, February 8, 2013. RegulationsSafety Valves (pop offs)
Definition(s)
Safety Valves (pop offs)
Valves most commonly used for temperature or pressure relief. Ensure venting from these valves terminate in a safe area. Source: IADC UBO / MPD Glossary, December 2011. Global StandardsSafety Voltage
Definition(s)
Safety Voltage (Extra Low Voltage)
Voltage which does not exceed 50 V a.c. r.m.s. between conductors, or between any conductor and earth, in a circuit isolated from the supply by means such as a safety isolating transformer, or converter with separate windings; a voltage which does not exceed 50 V d.c. between conductors, or between any conductor and earth, in a circuit which is isolated from higher voltage circuits. NOTE 1 Consideration should be given to the use of equipment operating at less than 50 V under certain conditions, such as wet surroundings, exposure to heavy seas or powerful water jets where direct contact with live parts is involved. NOTE 2 The voltage limit should not be exceeded either at full load or no-load but it is assumed, for the purpose of this definition, that any transformer or converter is operated at its rated supply voltage. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation. Global StandardsSafety Zone
Definition(s)
Safety Zone
'Safety Zone' means the area within a distance of 500 metres from any part of the installation, established by the Member State. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationSafety Zone
Safety zone means:- a greenhouse gas safety zone; or
- a petroleum safety zone.
Safety Zone
“Safety zone” means safety zone established under Chapter IX of these rules. Source: Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, India, 18th June 2008. RegulationsVeiligheidszone (Dutch)
„veiligheidszone”: het gebied binnen een afstand van 500 m van enig onderdeel van de installatie, ingericht door de lidstaat. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationZone de sécurité (French)
«zone de sécurité», la zone, établie par l’État membre, située dans un rayon de 500 mètres à partir de toute partie de l’installation. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationSikkerhedszone (Danish)
»sikkerhedszone«: et område inden for en afstand af 500 meter fra enhver del af anlægget, som medlemsstaten har udpeget. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationZona de seguridad (Spanish)
«zona de seguridad»: el área situada dentro de una distancia de 500 metros desde cualquier punto de la instalación, que establezca el Estado miembro. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationZonă de siguranță (Romanian)
„zonă de siguranță” înseamnă zona aflată la o distanță de 500 de metri de orice punct al instalației, stabilită de statul membru. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationSicherheitszone (German)
„Sicherheitszone“ den von dem Mitgliedstaat festgelegten Bereich innerhalb einer Entfernung von 500 m von jedem Teil der Anlage. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. Legislationζώνη ασφαλείας (Greek)
«ζώνη ασφαλείας» σημαίνει την περιοχή εντός απόστασης 500 μέτρων από οποιοδήποτε σημείο της εγκατάστασης, η οποία ορίζεται από το κράτος μέλος. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationZona di sicurezza (Italian)
«zona di sicurezza»: l’area, definita dallo Stato membro, situata a non più di 500 metri da qualsiasi parte dell’impianto. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationStrefa bezpieczeństwa (Polish)
„strefa bezpieczeństwa” oznacza obszar w odległości 500 metrów od jakiejkolwiek części instalacji, ustanowiony przez państwo członkowskie. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationZona de segurança (Portuguese)
«Zona de segurança», a área situada num raio de 500 metros a partir de qualquer parte da instalação, estabelecida pelo Estado-Membro. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationSäkerhetsområde (Swedish)
ett område inom ett avstånd på 500 meter från någon av anläggningens delar, vilket medlemsstaten fastställt. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationTurvavyöhykkeellä (Finish)
Tarkoitetaan jäsenvaltion määrittämää aluetta, joka on 500 metrin etäisyydellä laitteiston mistä tahansa osast. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationVarnostno Območje (Slovenian)
varnostno območje“ pomeni območje v razdalji 500 metrov od katerega koli dela naprave, ki ga določi država članica. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationBezpečnostná Zóna (Slovak)
je oblasť do vzdialenosti 500 metrov od akejkoľvek časti zariadenia, vymedzená členským štátom. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. Legislationsaugos zona (Lithianian)
valstybės narės nustatyta teritorija 500 metrų spinduliu nuo bet kurios įrenginio dalies. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. Legislationbiztonsági övezet (Hungarian)
a tagállam által meghatározott, a létesítmény bármely részétől 500 méteres távolságon belül lévő terület. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. Legislationżona ta’ sikurezza (Maltese)
tfisser iż-żona f’distanza ta’ 500 metru minn kwalunkwe parti tal-installazzjoni, stabbilita mill-Istat Membru. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. Legislationdrošuma zona (Latvian)
ir dalībvalsts noteikta teritorija 500 metru attālumā no jebkuras iekārtas daļas. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. Legislationturvatsoon (Estonian)
liikmesriigi kehtestatud ala, mis ulatub 500 meetri kaugusele rajatise kõikidest osadest. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. Legislationbezpečnostní zónou (Czech)
oblast ve vzdálenosti do 500 metrů od jakékoli části zařízení, stanovená daným členským státem. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. Legislationзона на безопасност (Bulgarian)
означава площта в периметър от 500 метра от всяка част на инсталацията, установена от държавата членка. Source: DIRECTIVE 2013/30/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 on safety of offshore oil and gas operations and amending Directive 2004/35/EC. LegislationSafety zone
“Safety zone” means the zone surrounding an offshore petroleum production place at the distance of five hundred metres as measured from each point of the outer edge of the offshore petroleum production place in accordance with international law. Source: Law of Information Energy, Act on Offences Relating to Offshore Petroleum Production Places B.E. 2530 (1987), Thailand, as of June 2013. LegislationSafety zone
A safety zone is an area extending 500 m from any part of offshore oil and gas installations and is established automatically around all installations which project above the sea at any state of the tide. Subsea installations may also have safety zones, created by statutory instrument, to protect them. These safety zones are 500 m radius from a central point. Vessels of all nations are required to respect them. It is an offence (under section 23 of the Petroleum Act 1987) to enter a safety zone except under the special circumstances outlined below. Source: Safety Zones Around Oil and Gas Installations in Waters Around the UK (UK HSE INDG189), Revision 1, November 2009. Regulatory GuidanceSafety Zone
A safety zone as defined in this section, extends from the seabed to 500 metres above the highest point on a facility in the vertical plane. Horizontally, the zone extends 500 metres from the extreme points of the facility, wherever they may be. Endpoints mean any part of the facility, including the riser to the point it meets the seabed. In connection with safety zones, anchors and anchoring points are not considered part of the facility. Reference is made to Chapter VIII. Source: Guidelines Regarding the Framework Regulations, Norway, updated December 2012. Regulatory GuidanceSafety Zone
A geographically delimited area surrounding an offshore facility where unauthorised vessels are forbidden to wait, pass through or conduct operations, i.e. vessels that play no part in the licensees' petroleum activities or that have not been given full or restricted access by authorities or licensees, also including aircraft. Unless otherwise stipulated by the King in Council, the zone extends from the seabed to maximum 500 metres above the highest vertical point of a facility. Horizontally, the zone extends 500 metres from the extreme points of the facility, wherever they may be. The zone does not limit activities which are specifically permitted in accordance with the Petroleum Act or which constitute official business. Source: Regulations relating to health, safety and the environment in the petroleum activities and at certain onshore facilities (the Framework Regulations), Norway, February 2010 (amended December 2011). RegulationsSafety-critical competency
Definition(s)
Safety-critical competency
Type of competence required of personnel in order to carry out an operation which, if carried out incorrectly or inadvertently, can lead to a major accident hazard. Source: ISO/TS 17969:2015, Petroleum, petrochemical and natural gas industries — Guidelines on competency for personnel, First Edition, June 2015. Global StandardsSafety-Critical Elements
Definition(s)
Safety Critical Element
Part of a facility, including computer programs, whose purpose is to prevent or limit the consequences of a major accident, or whose failure could cause or contribute substantially to a major accident- Note: 1 to entry: Safety critical elements include measures for prevention, detection, control and mitigation (including personnel protection) of hazards.
Safety Critical Element
Any component part of structure, equipment, plant or system whose failure could cause a major accidentt. Source: API RP 2FB, Recommended Practice for the Design of Offshore Facilities Against Fire and Blast Loading, First Edition, April 2006. Global StandardsSafety-Critical Elements
“Safety-critical elements” means such parts of an installation and such of its plant (including computer programmes), or any part thereof—- the failure of which could cause or contribute substantially to; or
- a purpose of which is to prevent, or limit the effect of, a major accident.
Safety Critical Element
Safety Critical Element (SCE) means such part of an installation and such of its plant (including computer programmes) or any part there of, the failure of which would cause or contribute substantially to, or a purpose of which is to prevent, or limit the effect of, a major accident. Source: NOGEPA Industrial Guideline No. 43, Surface BOP Review, Best Practices Checklist, Netherlands, Version 0, December 2011. Global StandardsSafety Critical Element
Safety-critical element— (a) means any part of an installation or its plant (including a computer program)— (i) that has the purpose of preventing, or limiting the effect of, a major accident; or (ii) the failure of which could cause or contribute substantially to a major accident; and (b) without limiting the generality of paragraph (a), includes plant installed at the installation for the purpose of— (i) detecting smoke, fire, accumulations of flammable (and other hazardous) gases, leakages of flammable liquids, and other events that may require an emergency response; or (ii) giving warning of an emergency by audible and, where necessary, visual alarm systems; or (iii) limiting the extent of an emergency, including— (A) measures to combat fire and explosions: (B) emergency shut-down systems: (C) facilities for the monitoring and control of the emergency and for organizing evacuation; or (iv) protecting petroleum workers from explosion, fire, heat, smoke, hazardous gas, or fumes during any period while petroleum workers may need to remain on an installation during an emergency; or (v) safely evacuating all petroleum workers to a place of safety; or (vi) providing safe means of escape in the event that arrangements for evacuation fail. Source: Health and Safety in Employment (Petroleum Exploration and Extraction) Regulations 2013, SR 2013/208, New Zealand, as of May 2013. RegulationsSafety-critical task
Definition(s)
Safety-critical task
Task performed on a safety-critical element which, if performed incorrectly due to lack of technical skills or knowledge or due to behaviour attributes, can lead to a major accident hazard. Source: ISO/TS 17969:2015, Petroleum, petrochemical and natural gas industries — Guidelines on competency for personnel, First Edition, June 2015. Global StandardsSafety-Integrity Level (SIL)
Definition(s)
Safety Integrity Level
Discrete integrity level of a safety instrumented function in a safety instrumented system.- NOTE: SILs are categorized in terms of probability of failure; see Annex E.