Nonpressure Boundary

Nonpressure Boundary

Definition(s)

Nonpressure Boundary

Components of the vessel that do not contain the process pressure (e.g. trays, tray rings, distribution piping, baffles, nonstiffening insulation support rings, clips, davits, etc.).

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

Nonpressure Boundary

Components and attachments of, or the portion of piping that does not contain the process pressure.
  • EXAMPLE: Clips, shoes, repads, supports, wear plates, nonstiffening insulation support rings, 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
Nominal Diameter

Nominal Diameter

Definition(s)

Nominal Diameter

Numerical designation of size that is common to all components in a piping system, other than components designated by outside diameters or by thread size.
  • Note: 1 to entry: It is a convenient round number for reference purposes and is only loosely related to manufacturing dimensions.
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
NORSOK Standards

NORSOK Standards

Definition(s)

NORSOK Standards

Estandares desarrollados por Ia industria petrolera noruega.

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
NIPP

NIPP

Definition(s)

NIPP

National Infrastructure Protection Plan .

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

NOST

Definition(s)

NOST

NASA Office of Standards and Technology 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
NASA

NASA

Definition(s)

NASA

U. S. National Aeronautics and Space Administration 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
Nonrepudiation

Nonrepudiation

Definition(s)

Nonrepudiation

Security service that provides protection against false denial of involvement in a communication [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
N

N

Definition(s)

n

Number of pad eyes/lifting set legs. Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards
Nonessential Primary Structure

Nonessential Primary Structure

Definition(s)

Nonessential Primary Structure

Structural elements whose main functions are not essential and can be redundant.
  • EXAMPLE   Floor plates and protective frame members. Side and roof panels, including corrugated panels, are not considered to be part of the primary structure
Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards
Non-sealing shear ram

Non-sealing shear ram

Definition(s)

Non-sealing shear ram

Closing component in a ram blowout preventer that is capable of shearing or cutting certain tubulars, but does not seal. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards
Nq

Nq

Definition(s)

Nq

Bearing capacity factor.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards
Nkt

Nkt

Definition(s)

Nkt

Cone factor.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards
NPS

NPS

Definition(s)

NPS

Nominal Pipe Size. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Noncondensable Gas

Noncondensable Gas

Definition(s)

Noncondensable Gas

Gas or vapor that remains in the gaseous state at a given temperature and pressure.

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

Normative

Definition(s)

Normative

Information or procedures that shall be used by the user/purchaser or supplier/manufacturer to comply with this specification.

Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards
Nondestructive Examination

Nondestructive Examination

Definition(s)

Nondestructive Examination

An inspection technique used to evaluate a part without causing permanent damage. Common techniques include magnetic particle inspection (MPI), dye penetrant inspection (DPI), or X-ray. Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards
NDA

NDA

Definition(s)

NDA

Non-Disclosure Agreement. Source: ISO/IEC 27032:2015, Information technology — Security techniques — Guidelines for cybersecurity, First Edition, July 2012. Global Standards
Non-adaptive Risk

Non-adaptive Risk

Definition(s)

Non-adaptive Risk

Category of risk that includes threats caused by natural and technological hazards Sample Usage: The suspected path of a tornado can be categorized as a non-adaptive risk. Annotation: Threats from non-adaptive risks are caused by physical characteristics and dimensions that do not change in reaction to measures taken. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance
Normalized Risk

Normalized Risk

Definition(s)

Normalized Risk

Measure of risk created by mathematically adjusting a value in order to permit comparisons.

Sample Usage: The risk assessment report displayed the normalized risk of the three biological agents to facilitate comparison and avoid sharing sensitive information.

Annotation:

  1. Typically, normalized risk divides the risk of each scenario by the sum of the risk across the set of scenarios under consideration. For example, if you are considering the expected number of fatalities from three different biological agents A, B and C, then the total risk posed by these biological agents is the sum of the risk posed by each of them. If agent A has expected fatalities of 10,000, Agent B has 7,000, and Agent C has 3,000, then the total risk is 20,000 fatalities and the normalized risks are 0.5 for Agent A, 0.35 for Agent B, and 0.15 for Agent C. This particular way of normalizing risk is commonly referred to as ―normalizing to 1‖ because now the risk from all the scenarios in the considered set sums to 1.
  2. Risk can be normalized by dividing by an existing sample space value. For example, if there were 100 car accidents this year and 800 last year, then normalizing these values with respect to the total vehicle trips each year permits a more appropriate comparison of the risk of last year versus this year. If there were 10,000 vehicle trips this year then 100/10,000, or 1% of all trips ended in accidents, whereas if last year there were 100,000 vehicle trips then 800/100,000, or 0.8% of all trips ended in accidents. Without normalization it would appear that it was more risky to drive last year, but in reality the opposite is the case.

Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance

Net Assessment

Net Assessment

Definition(s)

Net Assessment

Multidisciplinary strategic assessment process used to provide a comparative evaluation of the balance of strengths and weaknesses. Sample Usage: A key aspect of net assessment involves analyzing technological influences on the security environment. Annotation: Net assessment often involves the combined use of business principles, scenarios, crisis gaming and path gaming, conflict situations, and other tools. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance
Natural Hazard

Natural Hazard

Definition(s)

Natural Hazard

Source of harm or difficulty created by a meteorological, environmental, or geological phenomenon or combination of phenomena. Sample Usage: A natural hazard, such as an earthquake, can occur without warning. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance
Non-Repudiation

Non-Repudiation

Definition(s)

Non-Repudiation

Ability to prove the occurrence of a claimed event or action and its originating entities. Source: ISO/IEC 27000:2014, Information technology — Security techniques — Information security management systems — Overview and vocabulary, Third Edition, January 2014. Global Standards

Non-Repudiation

A property achieved through cryptographic methods to protect against an individual or entity falsely denying having performed a particular action related to data. Extended Definition: Provides the capability to determine whether a given individual took a particular action such as creating information, sending a message, approving information, and receiving a message. Adapted from: CNSSI 4009; From: NIST SP 800-53 Rev 4. 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
Network Services

Network Services

Definition(s)

Network Services

In the NICE Workforce Framework, cybersecurity work where a person: Installs, configures, tests, operates, maintains, and manages networks and their firewalls, including hardware (e.g., hubs, bridges, switches, multiplexers, routers, cables, proxy servers, and protective distributor systems) and software that permit the sharing and transmission of all spectrum transmissions of information to support the security of information and information systems. From: NICE Workforce Framework. 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
Network Resilience

Network Resilience

Definition(s)

Network Resilience

The ability of a network to: (1) provide continuous operation (i.e., highly resistant to disruption and able to operate in a degraded mode if damaged); (2) recover effectively if failure does occur; and (3) scale to meet rapid or unpredictable demands. Adapted 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
(Normal) Towing

(Normal) Towing

Definition(s)

(Normal) Towing

Drawing or pulling the unit by a chain or line using a tug boat.Normally towing is performed for units without any propulsion for (re-)location (compare with emergency towing). Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
Not Normally Manned

Not Normally Manned

Definition(s)

Not Normally Manned

A platform that does not have facilities to accommodate personnel for overnight or extended stays. Source: API RP 2SIM, Structural Integrity Management of Fixed Offshore Structures, First Edition, November 2014. Global Standards
Nonredundant Platform

Nonredundant Platform

Definition(s)

Nonredundant Platform

A platform for which its global capacity is reached when one of its primary structural elements reaches its maximum capacity. Source: API RP 2SIM, Structural Integrity Management of Fixed Offshore Structures, First Edition, November 2014. Global Standards
NPSHR Capacity Curve

NPSHR Capacity Curve

Definition(s)

NPSHR Capacity Curve

Shows the relationship between NPSHR and capacity.
Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Non-Recoverable Energy

Non-Recoverable Energy

Definition(s)

Non-Recoverable Energy

Head between the total energy head line and the total head line; energy that is no longer useful for moving oil down the line or vessel because it has been converted to heat and absorbed by the ground surrounding the line or vessel.
Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Node

Node

Definition(s)

Node

Connection point between different devices in a pipeline model.
Source: IADC UBO / MPD Glossary, December 2011. Global Standards