Line of Demarcation

Line of Demarcation

Definition(s)

Line of Demarcation

The “line of demarcation” means the dividing line used administratively to distinguish between the areas in which structures shall conform to Class “A” and Class “B” or “C” requirements.

Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards
Lining

Lining

Definition(s)

Lining

A nonmetallic or metallic material, installed on the interior of pipe, whose properties are better suited to resist damage from the process than the substrate material.

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
Level Bridle

Level Bridle

Definition(s)

Level Bridle

The piping assembly associated with a level gauge attached to a vessel.

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
LDAR

LDAR

Definition(s)

LDAR

leak detection and repair (of fugitive emissions). 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
Saddle

Saddle

Definition(s)

Saddle

Length of an arc of GRP material adhesively bonded to the outside of the pipe. 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
Lower Prediction Limit

Lower Prediction Limit

Definition(s)

Lower Prediction Limit

97,5 % lower bound value for an individual component failure, based on the long-term hydrostatic pressure or stress for a 20-year lifetime Note 1 to entry: The LPL will always be lower than the LCL (3.2.71) for the nominal regression line (i.e. the prediction interval will always be larger than the confidence interval). 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
LPL

LPL

Definition(s)

LPL

Lower Prediction Limit. 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  

LPL

97,5 % lower bound value for an individual component failure, based on the long-term hydrostatic pressure or stress for a 20-year lifetime Note 1 to entry: The LPL will always be lower than the LCL (3.2.71) for the nominal regression line (i.e. the prediction interval will always be larger than the confidence interval). 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
Lower Confidence Limit

Lower Confidence Limit

Definition(s)

Lower Confidence Limit

97,5 % lower bound value of the nominal long-term regression line for hydrostatic pressure or stress based on a 20-year lifetime. 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
LCL

LCL

Definition(s)

LCL

Lower confidence limit. 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  

LCL

97,5 % lower bound value of the nominal long-term regression line for hydrostatic pressure or stress based on a 20-year lifetime. 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
Long-term Envelope

Long-term Envelope

Definition(s)

Long-term Envelope

Envelope that defines the stress levels that are just below those that can potentially cause irreversible damage during continuous or occasional loading conditions at a specified temperature. 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
Leak Test

Leak Test

Definition(s)

Leak Test

Pressure test to determine the presence of leaks at joints or within components of a piping system.
  • Note: 1 to entry: Usually carried out at a pressure lower than the hydrotest (3.2.56) and for a longer period.
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
Laying Length

Laying Length

Definition(s)

Laying Length

Actual length of a line, corresponding to the initial length plus the increase afforded by the fitting or integral joint when installed. 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
Laminated Joint

Laminated Joint

Definition(s)

Laminated Joint

Joint consisting of plain-ended pipe and fittings laminated together with reinforcing fibres and resin/hardener mixture. 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
Laminate

Laminate

Definition(s)

Laminate

Unite laminae with a bonding material, usually using pressure and heat.
  • Note: 1 to entry: Normally used with reference to flat sheets, but can also refer to tubes. A product made by such bonding is referred to as a laminate.
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
Laminae

Laminae

Definition(s)

Laminae

Thin sheet of reinforcing fibres in a resin matrix built up into a flat or curved arrangement.

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

Loss of Position and/or Heading

Loss of Position and/or Heading

Definition(s)

Loss of Position and/or Heading

That the vessel's position and/or heading is outside the limits set for carrying out the DP activity in progress.

Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance  

Loss of Position and/or Heading

Loss of position and/or heading means that the vessel's position and/or heading is outside the limits set for carrying out the DP activity in progress.

Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance
Landing and Transfer Coordinator

Landing and Transfer Coordinator

Definition(s)

Landing and Transfer Coordinator

Person in charge of the engineered personnel transferring operation, ensures that all aspects of the personnel transferring operation are according to the DNV GL approved personnel transfer procedure, shall possess a thorough knowledge and have experience with the actual operation live load (LL) for marking purposes, it shall represent allowable number of persons on the gangway at one moment.

Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards

LCR

LCR

Definition(s)

LCR

Local control room. Source:  DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. Global Standards
LCMP

LCMP

Definition(s)

LCMP

Life cycle management plan.

Source: API STANDARD 18LCM, Product Life Cycle Management System Requirements for the Petroleum and Natural Gas Industries, First Edition, April 2017. Global Standards
Life Cycle Management (LCM) Status

Life Cycle Management (LCM) Status

Definition(s)

Life Cycle Management (LCM) Status

One of the designations applied to a product based on availability of or access to records, traceability, usage, repair, and maintenance.

Source: API STANDARD 18LCM, Product Life Cycle Management System Requirements for the Petroleum and Natural Gas Industries, First Edition, April 2017. Global Standards
LAN

LAN

Definition(s)

LAN

Local Area Network 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
Local Area Network

Local Area Network

Definition(s)

Local Area Network

Communications network designed to connect computers and other intelligent devices in a limited geographic area (typically less than 10 kilometers) [10]. 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
Lines, Units, Cells

Lines, Units, Cells

Definition(s)

Lines, Units, Cells

Lower-level elements that perform manufacturing, field device control, or vehicle functions.
  • NOTE: Entities at this level may be connected together by an area control network and may contain information systems related to the operations performed in that entity.
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
L

L

Definition(s)

L

Pad eye length. Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards
Lifting Test

Lifting Test

Definition(s)

Lifting Test

A test in which lifting equipment is subjected to a proof load as prescribed in the applicable section.

Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards
Lifting Set

Lifting Set

Definition(s)

Lifting Set

A flexible, load-carrying member comprised of integrated lifting equipment between the hoisting device and the CCU structure.

Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards
Lower Stack

Lower Stack

Definition(s)

Lower Stack

Lower section of a subsea BOP stack that contains BOP spools, valves, hydraulic connectors, and nipples that typically connect to the subsea wellhead, subsea tree, or tubing head spool (below) and LMRP (above). Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global Standards
LMP

LMP

Definition(s)

LMP

Larsen-Miller parameter. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards
LP2

LP2

Definition(s)

LP2

Limit load test path 2. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global Standards
LP3

LP3

Definition(s)

LP3

Limit load test path 3. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global Standards