Arc-fault circuit interrupter

Arc-fault circuit interrupter

Definition(s)

Arc-fault circuit interrupter

A device intended to provide protection from the effects of arc faults by recognizing characteristics unique to arcing and by functioning to de-energize the circuit when an arc fault is detected.

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
Apparatus, Intrinsically Safe

Apparatus, Intrinsically Safe

Definition(s)

Apparatus, Intrinsically Safe

Apparatus in which all the circuits are intrinsically safe.

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
Aluminum, Copper-free (or low copper content)

Aluminum, Copper-free (or low copper content)

Definition(s)

Aluminum, Copper-free (or low copper content)

Aluminum alloys containing 0.4 % or less copper. 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
Adjustable Speed Drive

Adjustable Speed Drive

Definition(s)

Adjustable Speed Drive

TA device that is used to control the speed of an AC motor by varying the frequency of the voltage supplied to it. These are also known as variable frequency drives, adjustable frequency drives and other, similar, names.

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
ASD

ASD

Definition(s)

ASD

Adjustable Speed Drive. 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  

ASD

A device that is used to control the speed of an AC motor by varying the frequency of the voltage supplied to it. These are also known as variable frequency drives, adjustable frequency drives and other, similar, names. 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
Subrope Splicing

Subrope Splicing

Definition(s)

Subrope Splicing

Subrope splicing is defined here as the replacement of one subrope for another by any means, such as overlapping, tucking, intertwining, or interbraiding. Subrope splicing should only be done to repair damage during assembly of the rope.

Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global Standards
Rope Modulus

Rope Modulus

Definition(s)

Rope Modulus

The ratio of rope stress to strain/the ratio of rope tension to elongation.
  • NOTE: Stiffness is often preferred as it is difficult to determine the area for a synthetic rope. Often the terms dynamic modulus/stiffness and static modulus/stiffness are used. Dynamic refers to modulus/stiffness values obtained when the rope is loaded quickly (seconds to minutes) where static refers to modulus/stiffness values obtained when the rope is loaded slowly (hours to days).
Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global Standards
Prototype Rope

Prototype Rope

Definition(s)

Prototype Rope

A rope fully complying with the rope design specification made for the purpose of testing either before an order is placed or before regular rope production begins for an order.

Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global Standards
Minimum Bending Radius

Minimum Bending Radius

Definition(s)

Minimum Bending Radius

Minimum radius to which the synthetic fiber rope construction can be bent to without damage to any part of the rope construction (including the jacket and filter). Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global Standards
Fiber Finish

Fiber Finish

Definition(s)

Fiber Finish

A designation of the process and finish used on a fiber for a particular purpose.
  • EXAMPLE Marine finish.
Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global Standards
Factor of Safety for Creep Failure

Factor of Safety for Creep Failure

Definition(s)

Factor of Safety for Creep Failure

The factor of safety for creep failure is defined as the predicted creep failure life divided by service life of the mooring rope.

Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global Standards
As-purchased Length

As-purchased Length

Definition(s)

As-purchased Length

The length of the rope (at specified minimal load) when it leaves the factory.

Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global Standards

Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global Standards
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

TML

TML

Definition(s)

TML

Thickness monitoring location. 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
Tank Farm Piping

Tank Farm Piping

Definition(s)

Tank Farm Piping

Process piping inside tank farm dikes or directly associated with a tank farm.

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
Structural Minimum Thickness

Structural Minimum Thickness

Definition(s)

Structural Minimum Thickness

Minimum required thickness without corrosion allowance, based on the mechanical loads other than pressure that result in longitudinal stress. See 7.6.
  • NOTE: The thickness is either determined from a standard chart or engineering calculations. It does not include thickness for corrosion allowance or mill tolerances.
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
Soil-to-air interface

Soil-to-air interface

Definition(s)

Soil-to-air interface

An area in which external corrosion may occur or be accelerated on partially buried pipe or buried pipe near where it egresses from the soil.
  • NOTE: The zone of the corrosion will vary depending on factors such as moisture, oxygen content of the soil, and operating temperature. The zone generally is considered to be at least 12 in. (305 mm) below to 6 in. (150 mm) above the soil surface. Pipe running parallel with the soil surface that contacts the soil is included.
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
SAI

SAI

Definition(s)

SAI

Soil-to-air interface.

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

SAI

An area in which external corrosion may occur or be accelerated on partially buried pipe or buried pipe near where it egresses from the soil.
  • NOTE: The zone of the corrosion will vary depending on factors such as moisture, oxygen content of the soil, and operating temperature. The zone generally is considered to be at least 12 in. (305 mm) below to 6 in. (150 mm) above the soil surface. Pipe running parallel with the soil surface that contacts the soil is included.

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

Small-bore piping

Small-bore piping

Definition(s)

Small-bore piping

Pipe or pipe components that are less than or equal to NPS 2.

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
SBP

SBP

Definition(s)

SBP

Small-bore piping. 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  

SBP

Pipe or pipe components that are less than or equal to NPS 2. 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
Secondary Process Piping

Secondary Process Piping

Definition(s)

Secondary Process Piping

Process piping located downstream of a block valve that can be valved-off without significantly affecting the process unit operability is commonly referred to as secondary process piping. Often, secondary process piping is small-bore piping (SBP). 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
Scanning

Scanning

Definition(s)

Scanning

The movement of a device (visual, ultrasonic, etc.) over a wide area as opposed to a spot reading and used to find flaws/defects (e.g. the thinnest thickness measurement at a CML or cracking in a weldment). See guidance contained in API 574.

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
RTP

RTP

Definition(s)

RTP

Reinforced thermoset plastic. 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
Retired from service

Retired from service

Definition(s)

Retired from service

Piping systems that are no longer going to be used for any process 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
PRT

PRT

Definition(s)

PRT

Profile radiographic examination. 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
Process Piping

Process Piping

Definition(s)

Process Piping

Hydrocarbon or chemical piping located at, or associated with a refinery or manufacturing facility. Process piping includes piperack, tank farm, and process unit piping, but excludes utility piping (e.g. steam, water, air, 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
Primary Process Piping

Primary Process Piping

Definition(s)

Primary Process Piping

Process piping in normal, active service that cannot be valved-off or, if it were valved off, would significantly affect unit operability. Primary process piping typically does not include small bore or auxiliary process piping (see also secondary process piping). 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
Pressure Design Thickness

Pressure Design Thickness

Definition(s)

Pressure Design Thickness

Minimum allowed pipe wall thickness needed to hold the design pressure at the design temperature.
  • NOTE: 1 Pressure design thickness is determined using the rating code formula, including needed reinforcement thickness.
  • NOTE: 2 Pressure design thickness does not include thickness for structural loads, corrosion allowance, or mill tolerances and therefore should not be used as the sole determinant of structural integrity for typical process piping (e.g. 7.3).
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
Positive Material Identification

Positive Material Identification

Definition(s)

Positive Material Identification

Any physical evaluation or test of a material to confirm that the material, which has been or will be placed into service, is consistent with the selected or specified alloy material designated by the owner/user.
  • NOTE: These evaluations or tests can provide qualitative or quantitative information that is sufficient to verify the nominal alloy composition (see API 578).
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
Pitting

Pitting

Definition(s)

Pitting

Localized corrosion of a metal surface in a small area and takes the form of cavities called pits. Pitting can be highly localized (including a single pit) or wide spread on a metal surface.

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