MDMT

MDMT

Definition(s)

MDMT

Minimum design metal temperature. Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards

Minimum design metal temperature (MDMT)

The lowest temperature at which a significant load can be applied to a pressure vessel as defined in the applicable construction code (e.g. ASME Code, Section VIII: Division I, Paragraph UG-20(b)). Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
Minimum Design Metal Temperature

Minimum Design Metal Temperature

Definition(s)

Minimum design metal temperature (MDMT)

The lowest temperature at which a significant load can be applied to a pressure vessel as defined in the applicable construction code (e.g. ASME Code, Section VIII: Division I, Paragraph UG-20(b)). Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Minimum design metal temperature

Lowest metal temperature likely to be reached in operation, normally taken as the lowest fluid temperature to which the riser will be exposed in service. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Maximum Allowable Working Pressure

Maximum Allowable Working Pressure

Definition(s)

Maximum allowable working pressure

The maximum gauge pressure permitted at the top of a pressure vessel in its operating position for a designated temperature. This pressure is based on calculations using the minimum (or average pitted) thickness for all critical vessel elements, (exclusive of thickness designated for corrosion) and adjusted for applicable static head pressure and nonpressure loads (e.g. wind, earthquake, etc.). The MAWP may refer to either the original design or a rerated MAWP obtained through a FFS assessment.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards

Maximum allowable working pressure

Maximum gauge pressure permissible at the top of a completed vessel in its normal operating position at the designated coincident temperature specified for that pressure.
  • NOTE: 1 See design pressure (3.1.24).
  • NOTE: 2 The MAWP is the least of the values for maximum allowed working pressure for any of the essential parts of the vessel.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards

Maximum allowable working pressure (MAWP)

The maximum gauge pressure pennitted at the top of a pressure vessel in its operating position for a designated temperature. This pressure is based on calculations using the minimum (or average pitted) thickness for all critical vessel elements, (exclusive of thickness designated for corrosion) and adjusted for applicable static head pressure and non-pressure loads, e.g. wind, earthquake, etc. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Maximum allowable working pressure

“Maximum allowable working pressure” means the maximum allowable working pressure set out in the record referred to in section 5.13. Source:  Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. Regulations  

Maximum allowable working pressure

“Maximum allowable working pressure” means the maximum allowable working pressure set out in the record referred to in section 6.12; pression de fonctionnement maximale autorisée. Source: Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, Canada, current to April 29, 2013. Regulations
On-stream

On-stream

Definition(s)

On-stream

A condition where a pressure vessel has not been prepared for an internal inspection. See on-stream inspection.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards

On-stream

A condition where a pressure vessel has not been prepared for an internal inspection. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
Material Degradation Due to Operation

Material Degradation Due to Operation

Definition(s)

Material degradation due to operation

Material degradation due to operation is defined as loss of material strength, ductility, or toughness due to creep, graphitization, temper embrittlement, hydrogen attack, fatigue, etc., see API RP 579. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
Localized Corrosion

Localized Corrosion

Definition(s)

Localized Corrosion

Corrosion that is largely confined to a limited or isolated area of the metal surface of a pressure vessel.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

Localized Corrosion

Deterioration restricted to isolated regions on a piping system, i.e. corrosion that is confined to a limited area of the metal surface (e.g. non-uniform corrosion).

Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

Localized Corrosion

Corrosion that is confined to a limited area of the metal surface. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
Jurisdiction

Jurisdiction

Definition(s)

Jurisdiction

A legally constituted government administration that may adopt rules relating to pressure vessels. Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Jurisdiction

A legally constituted governmental administration that may adopt rules relating to process piping systems.

Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards  

Jurisdiction

For the purposes of this section and sections 41 and 42, "jurisdiction" includes
  1. a federal authority;
  2. the government of a province;
  3. any other agency or body established pursuant to an Act of Parliament or the legislature of a province and having powers, duties or functions in relation to an assessment of the environmental effects of a project;
  4. any body established pursuant to a land claims agreement referred to in section 35 of the Constitution Act, 1982 and having powers, duties or functions in relation to an assessment of the environmental effects of a project;
  5. a government of a foreign state or of a subdivision of a foreign state, or any institution of such a government; and
  6. an international organization of states or any institution of such an organization.
Source: Canadian Environmental Assessment Act, 1992, c. 37, Canada, as consolidated November 2003. Legislation
Internal Inspection

Internal Inspection

Definition(s)

Internal inspection

An inspection performed from the inside of a pressure vessel using visual and/or NDE techniques. Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Internal Inspection

An inspection performed on the inside surface of a piping system using visual and/or NDE methods (e.g. boroscope).

NDE on the outside of the pipe to determine remaining thickness does not constitute an internal inspection.

Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards  

Internal inspection

Evaluation performed from the inside of a pressure vessel using visual and/or NDE procedures to establish the suitability of the vessel for continued operation. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
Inspector

Inspector

Definition(s)

Inspector

A shortened title for an authorized pressure vessel inspector qualified and certified in accordance with this code.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

Inspector

An authorized piping inspector per this inspection Code.

Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

Inspector

“Inspector” means a qualified person recognized under the laws of Canada or of a province as qualified to inspect boilers, pressure vessels or piping systems; inspecteur. Source: Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, Canada, current to April 29, 2013. Regulations  

Inspector

“Inspector” means the person who has been designated by the chief under section 1509.03 of the Revised Code, to administer and enforce provisions of Chapter 1509. of the Revised Code or rules thereunder. Source: Division of Mineral Resources Management - Oil and Gas, Ohio Administrative Code, Chapter 1501:9, January 2012. Regulations  

Inspector

“Inspector” means any supervisor, or inspector employed by the division, or any other representative authorized by the chief. Source: Division of Mineral Resources Management - Oil and Gas, Ohio Administrative Code, Chapter 1501:9, January 2012. Regulations

Inspector

Inspector means a health and safety inspector for the time being appointed under section 29(1). Source: Health and Safety in Employment Act 1992, Public Act 1992 No 96, New Zealand, as of 1 July 2011. Legislation  

Inspector

Employee of an agency qualified and responsible for one or more of the inspections or tests specified in the contract. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Inspector

A shortened title for an authorized pressure vessel inspector. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Inspector

“Inspector” means an officer authorized by the Central Government under sub-section (1) of Sec. 13 of the Act. Source: The Petroleum Rules, 2002, India, 13th March 2002. Regulations Source: The Petroleum Rules, 1976, India, 1976. Regulations  

Inspector

“Inspector” means a person recognized under the laws of Canada or of a province as qualified to inspect pressure systems. Source: Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. Regulations  

Inspector

“Inspector” means a person appointed as an inspector under section 6(4) of the Act. Source: The Offshore Installations (Inspectors and Casualties) Regulations 1973, UK S.I. 1973/1842, 1973. Regulations
Inspection Plan

Inspection Plan

Definition(s)

Inspection Plan

A strategy defining how and when a pressure vessel or pressure-relieving device will be inspected, repaired, and/or maintained. See 5.1.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

Inspection Plan

A documented set of actions and strategies detailing the scope, extent, methods and timing of specific inspection activities in order to determine the condition of a piping system/circuit based on defined/expected damage. (see 5.1). Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

Inspection Plan

A strategy defining how and when a pressure vessel or pressure-relieving device will be inspected, repaired, and/or maintained. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Inspection Plan

Document providing an overview of the sequence of inspections and tests, including appropriate resources and procedures to be referenced by the manufacturing plan. Source: ISO 13880:1999, Petroleum and natural gas industries — Content and drafting of a technical specification, First Edition, October 1999. Global Standards
Inspection

Inspection

Definition(s)

Inspection

The external, internal, or on-stream evaluation (or any combination of the three) of the condition of a vessel conducted by the authorized inspector or his/her designee in accordance with this code. Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

Inspection

The external, internal, or on-stream evaluation (or any combination of the three) of piping condition conducted by the authorized inspector or his/her designee.
  • NOTE: NDE may be conducted by examiners at the discretion of the responsible authorized piping inspector and become part of the inspection process, but the responsible authorized piping inspector shall review and approve the results.
Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

Inspection

The external, internal, or on-stream evaluation (or any combination of the three) of a pressure vessel's condition. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standard  

Inspection

The visit to the platform and the associated survey activities for purposes of collecting data required in evaluating its structural integrity for continued operation. Source: API RP 2SIM, Structural Integrity Management of Fixed Offshore Structures, First Edition, November 2014. Global Standards  

Inspection

Process of examining OCTG for possible defects or for deviation from established standards. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Inspection

Process of measuring, examining, testing, gauging or otherwise comparing the product with the applicable requirements. Source:  API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standard  

Inspection

Comparison of equipment conformity to predetermined standards, followed by a determination of action required. Source: API RP 8B, Recommended Practice for Procedures for Inspections, Maintenance, Repair and Remanufacture of Hoisting Equipment, Seventh Edition, March 2002 (Reaffirmed: August 2012). Global Standards  

Inspection

Process of measuring, examining, testing, gauging or otherwise comparing a unit of product with the applicable requirements. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global Standards  

Inspection

Process of measuring, examining, testing, gauging or otherwise comparing the product with the applicable requirements. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global Standards  

Inspection

Action comprising careful scrutiny of an item carried out either without dismantling, or with the addition of partial dismantling as required, supplemented by means such as measurement, in order to arrive at a reliable conclusion as to the condition of an item. Source: IEC 61892-7, Mobile and fixed offshore units – Electrical installations – Part 7: Hazardous areas. Global Standards Source: IEC 60079-17:2013, Explosive atmospheres – Part 17: Electrical installations inspection and maintenance, Edition 5.0, November 2013. Global Standards  

Inspection

A visit on board a ship to check both the validity of the relevant certificates and other documents, and the overall condition of the ship, its equipment and its crew. Source: IMO resolution A.1052(27), Procedures for Port State Control, 2011, 201 December 2011, International Maritime Organization. Regulatory Guidance   

Inspection

Inspection means an inspection conducted under Part 4 of this Schedule. For this purpose, an inspection may include an investigation or inquiry, but need not include a physical inspection of any facility, premises or other thing. Source: Offshore Petroleum and Greenhouse Gas Storage Act 2006, Australia, amended 2012. Legislation  

Inspection

Activities such as measuring, examination, testing, gauging one or more characteristics of an object or service and comparing the results with specified requirements to determine conformity. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global Standards  

Inspection

The process of measuring, examining, testing, gauging or otherwise comparing the item with the approved drawings and the fabrication yard’s written standards, including those which have been agreed by LR for the purposes of classification of the specific type of unit concerned. Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 4, Steel Unit Structures, June 2013, Lloyd’s Register, Global Standards  

Inspection

visual control of lifting equipment for defects and check of operating controls, limit switches and indicators Source: Rules for Classification and Construction, IV Industrial Services, 6 Offshore Technology, 9 Guideline for Personnel Transfers by Means of Lifting Appliances, Edition 2011, Germanischer Lloyd SE, Global Standards
In-service Inspection

In-service Inspection

Definition(s)

In-service Inspection

All inspection activities associated with a pressure vessel once it has been placed in service but before it is permanently retired from service. Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

In-service inspection

All inspection activities associated with piping after it has been initially placed in service but before it has been retired.

Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

In-service inspection

All inspection activities associated with a pressure vessel once it has been placed in service. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
In-service

In-service

Definition(s)

In Service

Designates a pressure vessel that has been placed in operation as opposed to new construction prior to being placed in service or retired vessels. A pressure vessel not in operation because of a process outage is still considered an in-service pressure vessel.
  • NOTE: Does not include pressure vessels that are still under construction or in transport to the site prior to being placed in service or pressure vessels that have been retired from service. It does include pressure vessels that are temporarily out of service but still in place in an operating site. A stage in the service life of a vessel between installation and being removed from service.
Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

570, Piping Inspection Code

Designates a piping system that has been placed in operation as opposed to new construction prior to being placed in service or retired. A piping system not currently in operation due to a process outage is still considered to be in service. The operational stage of a piping system lifecycle that commences upon initial commissioning and ends when the piping system is finally retired from service or abandoned in place.
  • NOTE: 1 Does not include piping systems that are still under construction or in transport to the site prior to being placed in service or piping systems that have been retired.
  • NOTE: 2 Piping systems that are not currently in operation due to a temporary outage of the process, turnaround, or other maintenance activity are still considered to be “in service.” Installed spare piping is also considered in service; whereas spare piping that is not installed is not considered in service.
Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

In-service

Designates a pressure vessel that has been placed in operation as opposed to new construction prior to being placed in service or retired vessels. A pressure vessel not in operation due to an outage is still considered an in-service pressure vessel. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

In-service

A crane is in-service when the operator is in control of the crane. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards  

In-service

A platform that has been placed in operation. Source: API RP 2SIM, Structural Integrity Management of Fixed Offshore Structures, First Edition, November 2014. Global Standards  

In-service

When a crane is capable of operating in a safe manner in accordance with the capacities shown on the posted load chart.
  • NOTE: In-service conditions can be with the boom out of the boom rest or in the boom rest (stowed).
Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Industry-qualified UT Shear Wave Examiner

Industry-qualified UT Shear Wave Examiner

Definition(s)

Industry-qualified UT shear wave examiner

A person who possesses an ultrasonic shear wave qualification from API (e.g. API-QUTE) or an equivalent qualification approved by the owner/user. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
Indications

Indications

Definition(s)

Indications

A response or evidence resulting from the application of a NDE that may be nonrelevant or could be flaws or defects upon further analysis.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards

Indications

A response or evidence resulting from the application of a nondestructive examination. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Indication

Response or evidence from NDT. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Indication

Visual signs of cracks, pits, or other abnormalities found during liquid penetrant and magnetic particle examination. Source: API SPEC 16RCD, Specification for Drill Through Equipment—Rotating Control Devices, Upstream Segment, First Edition, February 2005. Global Standards
Imperfections

Imperfections

Definition(s)

Imperfections

Flaws or other discontinuities noted during inspection or examination that may or may not exceed the applicable acceptance criteria.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

Imperfection

Flaws or other discontinuities noted during inspection that may be subject to acceptance criteria during an engineering and inspection analysis.

Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards  

Imperfection (or Flaw)

Discontinuity or irregularity in the product.
  • NOTE: For more detailed definitions and illustrations of specific imperfections, see API Std 5T1.
Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards

Imperfections

Flaws or other discontinuities noted during inspection that mayor may not exceed the applicable acceptance criteria. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards

Hold Point

Hold Point

Definition(s)

Hold Point

A point in the repair or alteration process beyond which work may not proceed until the required inspection or NDE has been performed.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

Hold Point

A point in the repair or alteration process beyond which work may not proceed until the required inspection/examination has been performed and verified.

Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

Hold Point

A point in the repair or alteration process beyond which work may not proceed until the required inspection or NDE has been performed and documented. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Hold Point

A defined stage of manufacture beyond which the work must not proceed until the inspection has been carried out by all the relevant personnel. Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 4, Steel Unit Structures, June 2013, Lloyd’s Register, Global Standards
General Corrosion

General Corrosion

Definition(s)

General Corrosion

Corrosion that is distributed more or less uniformly over the surface of the metal, as opposed to localized corrosion.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

General Corrosion

Corrosion that is distributed more or less uniformly over the surface of the piping, as opposed to being localized in nature.

Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

General Corrosion

Corrosion that is distributed more or less uniformly over the surface of the metal. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
Fitness-for-service Evaluation

Fitness-for-service Evaluation

Definition(s)

Fitness-for-service evaluation

An engineering methodology whereby flaws and other deterioration/damage contained within piping systems are assessed in order to determine the structural integrity of the piping for continued service (see API 579-1/ASME FFS-1). Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

Fitness-for-service evaluation

A methodology whereby flaws and conditions contained within an equipment item are assessed in order to determine the integrity of the equipment for continued service. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
External Inspection

External Inspection

Definition(s)

External inspection

A visual inspection performed from the outside of a pressure vessel to find conditions that could impact the vessel’s ability to maintain pressure integrity or conditions that compromise the integrity of the supporting structures (e.g. ladders, platforms, supports). The external inspection may be done either while the vessel is operating or while the vessel is out-of-service and can be conducted at the same time as an on-stream inspection.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

External inspection

A visual inspection performed from the outside of a piping system to locate external issues that could impact the piping systems' ability to maintain pressure integrity (see 5.5.4). External inspections are also intended to find conditions that compromise the integrity of the coating and insulation covering, the supporting structures and attachments (e.g. stanchions, pipe supports, shoes, hangers, instrument, and small branch connections). Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

External inspection

A visual inspection performed from the outside of a pressure vessel to find conditions that could impact the vessel's ability to maintain pressure integrity or conditions that compromise the integrity of the supporting structures, e.g. ladders, platforms. This inspection may be done either while the vessel is operating or while the vessel is out-of service. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

External inspection

Evaluation performed from the outside of a pressure vessel using visual procedures to establish the suitability of the vessel for continued operation. The inspection may, or may not, be carried out while the vessel is in operation. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
Examiner

Examiner

Definition(s)

Examiner

A person who assists the inspector by performing specific NDE on pressure vessel components and evaluates to the applicable acceptance criteria but does not evaluate the results of those examinations in accordance with API 510, unless specifically trained and authorized to do so by the owner/user.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

Examiner

A person who assists the inspector by performing specific NDE on piping system components and evaluates to the applicable acceptance criteria (where qualified to do so), but does not evaluate the results of those examinations in accordance with API 570 requirements, unless specifically trained and authorized to do so by the owner/user.

Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

Examiner

A person who assists the inspector by performing specific nondestructive examination (NDE) on pressure vessel components but does not evaluate the results of those examinations in accordance with API 510, unless specifically trained and authorized to do so by the owner/user. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Examiner

Person competent to conduct and score an examination, where the examination requires professional judgement. [SOURCE: ISO/IEC 17024:2012, 3.10] Source: ISO/IEC TS 17027:2014, Conformity assessment – Vocabulary related to competence of persons used for certification of persons, Global Standards
Engineer

Engineer

Definition(s)

Engineer

Pressure vessel engineer. Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
ET

ET

Definition(s)

ET

Eddy current technique. Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

ET

Eddy current examination technique. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
Documentation

Documentation

Definition(s)

Documentation

Records containing descriptions of specific vessel design, personnel training, inspection plans, inspection results, NDE, repair, alteration, rerating and pressure testing activities, FFS assessments, procedures for undertaking these activities, or any other information pertinent to maintaining the integrity and reliability of vessels.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards

Documentation

Records containing descriptions of specific training, inspection, NDE, and pressure testing activities, or procedures for undertaking these activities. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Documentation

Documentation as mentioned in the second subsection, means a description of a) measures taken, b) results from remote measurement and environmental surveys in connection with acute pollution, c) environmental impact and detrimental environmental consequences, d) achievement of objectives, e) criteria for concluding measures. Source: Guidelines Regarding the Activities Regulations, Norway, updated December 2012. Regulatory Guidance
Design Temperature

Design Temperature

Definition(s)

Design Temperature

The temperature used for the design of the pressure vessel per the applicable construction code.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

Design Temperature (of a piping system component)

The temperature at which, under the coincident pressure, the greatest thickness or highest component rating is required. It is the same as the design temperature defined in ASME B31.3 and other code sections and is subject to the same rules relating to allowances for variations of pressure or temperature or both.
  • NOTE: Different components in the same piping system or circuit can have different design temperatures. In establishing this temperature, consideration should be given to process fluid temperatures, ambient temperatures, heating/cooling media temperatures, and insulation.
Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

Design Temperature

The temperature used in the design of the pressure vessel per the applicable construction code. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards  

Design temperature

The design temperature for a unit is the reference temperature for assessing areas where the unit can be transported, installed and operated. The design temperature is to be lower or equal to the lowest mean daily temperature in air for the relevant areas. For seasonal restricted operations the lowest mean daily temperature in air for the season may be applied. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global Standards  

Design temperature

Lowest mean daily air temperature for the area of operation, used for the selection of steel grades Source: Rules for Classification and Construction, IV Industrial Services, 6 Offshore Technology, 9 Guideline for Personnel Transfers by Means of Lifting Appliances, Edition 2011, Germanischer Lloyd SE, Global Standards
CUI

CUI

Definition(s)

CUI

Refers to all forms of CUI including stress corrosion cracking and corrosion under fireproofing.

Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards  

CUI

Corrosion under insulation, including stress corrosion cracking under insulation. Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards

CUI

Corrosion Under Insulation. Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards 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

Corrosion under insulation (CUI)

Refers to all forms of corrosion under insulation including stress corrosion cracking. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards
SHI

SHI

Definition(s)

Substance hazard index (SHI)

The substance hazard index (SHI) is an index developed to identify objectively the toxic chemicals or substances that could be involved in a catastrophic release. The index is a simple function of vapor pressure and toxicity: the higher a substance’s vapor pressure, the more readily it will enter the atmosphere in the event of a release. The greater a substance’s toxicity, the lower the concentration required to present a hazard, and the higher its SHI. A more detailed definition, along with an illustrative list of substances and their SHIs, is presented in Appendix C. Source: API RP 750, Management of Process Hazards, First Edition, January 1990. Global Standards  
PHA

PHA

Definition(s)

PHA

Process Hazards Analysis Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards

Process hazards analysis (PHA)

Process hazards analysis (PHA) is the application of one or more analytical techniques that aid in identifying and evaluating process hazards. Source: API RP 750, Management of Process Hazards, First Edition, January 1990. Global Standards  

PHA

Process Hazard Assessment. An organized and systematic methodology to identify the potential hazards associated with a particular operation, piece of equipment, or total system. Processes commonly used are:
  1. What if
  2. Checklist
  3. HAZOP
  4. FMEA
  5. FTA
Source: IADC UBO / MPD Glossary, December 2011. Global Standards  

PHA

Preliminary Hazard Analysis. Source: International Association of Drilling Contractors, Appendix 2 to Health, Safety and Environment Case Guidelines for Offshore Drilling Contractors, Issue 3.3.2, February 2010. IADC Guidelines  

PHA

Process Hazard Analysts. Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global Standards
FATO

FATO

Definition(s)

Final approach and take-off area (FATO)

Final approach and take-off area (FATO) is a defined area over which the final phase of the approach manoeuvre to hover or landing of the helicopter is intended to be completed and from which the take-off manoeuvre is intended to be commenced. Source: IMO Resolution A.1023(26), Code for the Construction and Equipment of Mobile Offshore Drilling Units (2009 MODU Code), 2009. Global Standards
LOS

LOS

Definition(s)

Limited Obstacle Sector (LOS)

Limited obstacle sector (LOS) is a sector extending outward which is formed by that portion of the 360° arc, excluding the obstacle-free sector, the centre of which is the reference point from which the obstacle-free sector is determined. Obstacles within the limited obstacle sector are limited to specified heights. Source: IMO Resolution A.1023(26), Code for the Construction and Equipment of Mobile Offshore Drilling Units (2009 MODU Code), 2009. Global Standards  

LOS

Limited Obstacle Sector, the 150° sector within which obstacles may be permitted. Source: NOGEPA Guideline 14, Helideck Operations and Procedures Manual, Netherlands, Version 2, December 2011. Global Standards