Utility Piping

Utility Piping

Definition(s)

Utility Piping

Non-process piping associated with a process unit (e.g. steam, air, water, nitrogen, etc.).

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

UV Radiation

UV Radiation

Definition(s)

UV Radiation

Ultraviolet Radiation. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards  

UV Radiation

Electromagnetic radiation in the frequency band just above the visible spectrum. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Ultraviolet Radiation

Ultraviolet Radiation

Definition(s)

Ultraviolet Radiation

Electromagnetic radiation in the frequency band just above the visible spectrum. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Unsaturated Polyester

Unsaturated Polyester

Definition(s)

Unsaturated Polyester

Class of thermosetting resin formed by the condensation reaction between difunctional acids and glycols.
  • Note: 1 to entry: Cure is accomplished, as with vinyl esters, by copolymerization with other vinyl monomers such as styrene.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Untwisted Fibrous Bundle

Untwisted Fibrous Bundle

Definition(s)

Untwisted Fibrous Bundle

Mass of a fibrous bundle expressed per unit length.
  • Note: 1 to entry: A higher tow tex indicates a heavier roving. Tow tex is inversely proportional to yield. Consequently, a lower yield indicates a heavier roving. Tow tex is typically expressed as grams per kilometer. Yield is typically expressed as yards per pound. Tow tex = 496 054,6/yield.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Unidades Móviles de Perforación Costa Afuera (Mobile Offshore Drilling Units – MODUs)

Unidades Móviles de Perforación Costa Afuera (Mobile Offshore Drilling Units – MODUs)

Definition(s)

Unidades Móviles de Perforación Costa Afuera (Mobile Offshore Drilling Units - MODUs)

Instalaciones diseñadas o modificadas para participar en actividades de perforación. El término MODU incluye los barcos de perforación (drill ships), semisumergibles, sumergibles, jack-ups e instalaciones similares que puedan movilizarse sin mayor esfuerzo. Estas instalaciones pueden o no tener equipos de autopropulsión a bordo y pueden requerir equipos de posicionamiento dinámico o sistemas de amarre para mantener su posición.

Source: Resolución Número 40687 de 18 Jul 2017 Por la cual se establecen los criterios técnicos para proyectos de perforación exploratoria de hidrocarburos costa afuera en Colombia. Columbia Ministerio de Minas y Energia, Regulations
Unescorted Access

Unescorted Access

Definition(s)

Unescorted Access

Having the authority to enter and move about a secure area without escort .

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

Use Case

Definition(s)

Use Case

Technique for capturing potential functional requirements that employs the use of one or more scenarios that convey how the system should interact with the end user or another system to achieve a specific goal.
  • NOTE: Typically use cases treat the system as a black box, and the interactions with the system, including system responses, are as perceived from outside of the system. Use cases are popular because they simplify the description of requirements, and avoid the problem of making assumptions about how this functionality will be accomplished
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
Utility Bolting

Utility Bolting

Definition(s)

Utility Bolting

All bolting that is required to mount equipment and accessories to the drill-through equipment that is not closure bolting, pressure retaining, or pressure controlling.
  • NOTE: Examples: bolting on lifting eye, pad eye (nonwelded), wear bushing, name plate, clamps for tubing, guards.
Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards

Utility Bolting

All bolting that is required to mount equipment and accessories to the drill-through equipment that is not closure bolting, pressure retaining, or pressure controlling.
  • NOTE: Examples include bolting on lifting eyes, pad eyes (non-welded), wear bushing, nameplate, clamps for tubing, guards.
Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards
UU

UU

Definition(s)

UU

Unconsolidated undrained triaxial tests. Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards
Undesirable Events

Undesirable Events

Definition(s)

Undesirable Events

An event that results in a loss of an asset, whether it is a loss of capability, life, property, or equipment.

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

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

U.S. Outer Continental Shelf

Definition(s)

U.S. Outer Continental Shelf

All submerged lands lying seaward and outside of the area of lands beneath navigable waters, as defined in Section 2 of the Submerged Lands Act (43 U.S.C. 1301), subsoil and seabed of which appertain to the United States and are subject to its jurisdiction and control. Source:API RP T-1, Creating Orientation Programs for Personnel Going Offshore, Fifth Edition, November 2016. Global Standards
URL

URL

Definition(s)

URL

Uniform Resource Locator. Source: ISO/IEC 27032:2015, Information technology — Security techniques — Guidelines for cybersecurity, First Edition, July 2012. Global Standards
URI

URI

Definition(s)

URI

Uniform Resource Identifier. Source: ISO/IEC 27032:2015, Information technology — Security techniques — Guidelines for cybersecurity, First Edition, July 2012. Global Standards
Unsolicited Email

Unsolicited Email

Definition(s)

Unsolicited Email

Email that is not welcome, or was not requested, or invited. Source: ISO/IEC 27032:2015, Information technology — Security techniques — Guidelines for cybersecurity, First Edition, July 2012. Global Standards
Unit of Measurement

Unit of Measurement

Definition(s)

Unit of Measurement

Particular quantity, defined and adopted by convention, with which other quantities of the same kind are compared in order to express their magnitude relative to that quantity. [SOURCE: ISO/IEC 15939:2007] Source: ISO/IEC 27000:2014, Information technology — Security techniques — Information security management systems — Overview and vocabulary, Third Edition, January 2014. Global Standards
Unmitigated Risk

Unmitigated Risk

Definition(s)

Unmitigated Risk

Risk that remains after risk management measures have been implemented. Sample Usage: While increased patrols lessened the likelihood of trespassers, residual risk remained due to the unlocked exterior doors. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance
Unmitigated Risk (residual risk)

Unmitigated Risk (residual risk)

Definition(s)

Unmitigated Risk (residual risk)

Risk that remains after risk management measures have been implemented. Residual risk is ―risk that remains after risk management measures have been implemented‖). Sample Usage: A risk to the facility that was not considered in the risk assessment was a potential unmitigated risk. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance
Uncertainty

Uncertainty

Definition(s)

Uncertainty

Degree to which a calculated, estimated, or observed value may deviate from the true value.

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

Uncertainty

Degree to which a calculated, estimated, or observed value may deviate from the true value. Sample Usage: The uncertainty in the estimate was due to a lack of information for the particular environment and situation. Annotation:
  1. Uncertainty may stem from many causes, including the lack of information.
  2. The concept of uncertainty is useful in understanding that likelihoods and consequences can oftentimes not be predicted with a high degree of precision or accuracy.
Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance
Unacceptable Risk

Unacceptable Risk

Definition(s)

Unacceptable Risk

Level of risk at which, given costs and benefits associated with further risk reduction measures, action is deemed to be warranted at a given point in time.

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

Unacceptable Risk

Definition: level of risk at which, given costs and benefits associated with further risk reduction measures, action is deemed to be warranted at a given point in time. Sample Usage: The presence of contaminants in excess of a certain level represents an unacceptable risk to public health. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance
Unauthorized Access

Unauthorized Access

Definition(s)

Unauthorized Access

Any access that violates the stated security policy. 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 Standards
Usability Testing

Usability Testing

Definition(s)

Usability Testing

Evaluation methods and techniques used to support Human-Centred Design (HCD) and used for the purpose of increasing the usability of a system. Source: IMO MSC.1/Circ.1512, Guideline on Software Quality Assurance and Human-Centred Design for e-navigation, 8 June 2015, International Maritime Organization. Regulatory Guidance
Usability

Usability

Definition(s)

Usability

The extent to which systems can be used by users to achieve specified goals with effectiveness, efficiency and satisfaction, in a specified context of use. Source: IMO MSC.1/Circ.1512, Guideline on Software Quality Assurance and Human-Centred Design for e-navigation, 8 June 2015, International Maritime Organization. Regulatory Guidance  

Usability

Extent to which a system, product or service can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use.
  • Note 1 to entry: Systems, products or services are part of work systems (2.2) and used by workers (2.4) within those systems.
  • Note 2 to entry: In this International Standard, the context of use is within a work system.
[SOURCE: ISO 9241-210:2010, 2.13]. Source: ISO 6385:2016, Ergonomics principles in the design of work systems, Third Edition, September 2016. Global Standards
UA

UA

Definition(s)

UA

Utility area 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
Upsurge

Upsurge

Definition(s)

Upsurge

Positive pressure surge. Upsurge pressure is above the normal operating pressuren. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Unloader

Unloader

Definition(s)

Unloader

See: pocket unloader. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Underbalanced Operation (UBO)

Underbalanced Operation (UBO)

Definition(s)

Underbalanced Operation (UBO)

A well construction or maintenance activity employing appropriate equipment and controls where the pressure exerted in the wellbore is intentionally less than the pore pressure in any part of the exposed formations with the intention of bringing formation fluids to the surface. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Underbalanced

Underbalanced

Definition(s)

Underbalanced

Conducted in a state of underbalance. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Ultimate Potential

Ultimate Potential

Definition(s)

Ultimate Potential

An estimate of recoverable reserves produced by the time all exploration and development activity is completed. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
UBD Zone

UBD Zone

Definition(s)

UBD  Zone

Section of well, in the context of Underbalanced Operations, where performing UBD. Source: IADC UBO / MPD Glossary, December 2011. Global Standards