NTD

NTD

Definition(s)

NTD

Nonlinear time domain. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  
MTL

MTL

Definition(s)

MTL

Maximum tensile load. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
LTD

LTD

Definition(s)

LTD

Linearized time domain. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
FEM

FEM

Definition(s)

FEM

Finite element modelling. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  
DWP

DWP

Definition(s)

DWP

Design working pressure (mathematical symbol: pDW). Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
AVE

AVE

Definition(s)

AVE

Apparent volumetric expansion. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Weak Link

Weak Link

Definition(s)

Weak Link

Device that is used to ensure that the umbilical parts or severs at a specified load and location. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  
Verification Test

Verification Test

Definition(s)

Verification Test

Test performed to qualify the design and manufacture of the item for its use in service as well as to provide characterization data. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  
Unaged Representative Sample

Unaged Representative Sample

Definition(s)

Unaged Representative Sample

Non-degraded sample of umbilical, or component that has not previously been subjected to operational or installation loadings, stresses, elevated temperature, and/or other conditions that can degrade the sample. EXAMPLES Electric cables, hoses, tubes and optical fibres. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  
Umbilical System

Umbilical System

Definition(s)

Umbilical System

Umbilical, complete with end terminations and other ancillary equipment. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  
Umbilical Joint

Umbilical Joint

Definition(s)

Umbilical Joint

Means of joining together two lengths of umbilical to effect a repair or to achieve the required production length. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  
Ultimate Tensile Load

Ultimate Tensile Load

Definition(s)

Ultimate Tensile Load

Load at which the weakest component of the umbilical bundle fails when the load is applied with the umbilical in a straight condition. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Tensile Armour

Tensile Armour

Definition(s)

Tensile Armour

Structural layer consisting of e.g. steel wires, fibre reinforced plastic rods, etc. that is used to sustain tensile loads in the umbilical. NOTE For some applications, the tensile armour may also have the additional function of providing additional weight and/or impact protection. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Subsea Umbilical Termination

Subsea Umbilical Termination

Definition(s)

Subsea Umbilical Termination

Mechanism for mechanically, electrically, optically and/or hydraulically connecting an umbilical or jumper bundle to a subsea system. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Subsea Termination Interface

Subsea Termination Interface

Definition(s)

Subsea Termination Interface

Mechanism that forms the transition between the umbilical and the subsea termination. NOTE The interface is comprised typically of an umbilical armour termination and/or a mechanical anchoring device for the tubes, bend stiffener/limiter, and tube or hose-end fittings. If the umbilical contains electric cables/fibre optics, then penetrator(s) and/or connectors may also be incorporated. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Static Application

Static Application

Definition(s)

Static Application

Application for which the load effect(s) due to dynamic loads (e.g. wave action, induced vibrations, etc.) when installed can be neglected. NOTE Free spans, in an otherwise static umbilical, should be considered as a dynamic application. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  

Static Application

Flexible pipes not exposed to significant cyclically varying loads or deflections during normal operations. Source: API SPEC 17J, Specification for Unbonded Flexible Pipe, Third Edition, July 2008. Global Standards
S-N Data

S-N Data

Definition(s)

S-N Data

Data obtained by plotting cyclic stress level versus number of cycles to failure. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Multi-Coupler

Multi-Coupler

Definition(s)

Multi-Coupler

Multi-way connector arrangement comprised of two mating stabplate sub-assemblies, one of which is made of a number of hydraulic and/or electric and/or optical coupler halves, each carrying a separate service, that mate simultaneously with corresponding coupler halves on the other sub-assembly when the two sub-assemblies are brought together. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Minimum Bend Radius

Minimum Bend Radius

Definition(s)

Minimum Bend Radius

Minimum radius to which an umbilical, at zero tensile load, can be bent to without infringing the stress criterion or suffering loss of performance. See Figure 1 and 3.1.8. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  

Minimum Bend Radius

The minimum hose bending radius dimension measured from the centerline of the hose specified in Table 10. NOTE: See Figure 11. Source:API SPECIFICATION 7K, Drilling and Well Servicing Equipment, Sixth Edition, December 2015. Global Standards
Messenger Wire

Messenger Wire

Definition(s)

Messenger Wire

Device installed or pre-fitted into an I-tube or J-tube for transferring the primary pulling device, usually a wire rope, into the tube to provide means of pulling an umbilical through the tube. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Maximum Tensile Load

Maximum Tensile Load

Definition(s)

Maximum Tensile Load

Maximum tensile load that an umbilical, with zero curvature, can withstand without infringing the stress criterion or suffering loss of performance. See Figure 1, and 3.1.8. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Manufacturer’s Written Specification

Manufacturer’s Written Specification

Definition(s)

Manufacturer's Written Specification

Specification for the umbilical, the umbilical components and their manufacture, generated by the manufacturer in compliance with requirements specified by the purchaser and this part of ISO 13628. NOTE The specification may be comprised of a multiplicity of documents (design plan, inspection and test plan, test procedures, etc.). Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Load-Out

Load-Out

Definition(s)

Load-Out

Transfer of an umbilical or umbilical system from a storage facility onto an installation/shipping vessel, either by transfer spooling or by lifting the product stored on its installation/shipping reel. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Lay Angle

Lay Angle

Definition(s)

Lay Angle

Angle between the axis of a spiral-wound element (e.g. armour wires) and a line parallel to the longitudinal axis of the umbilical. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  

Lay Angle

Angle between the axis of a spiral wound element (for example, armour wires) and a line parallel to the flexible pipe longitudinal axis. Source: API SPEC 17J, Specification for Unbonded Flexible Pipe, Third Edition, July 2008. Global Standards
Lay-Up

Lay-Up

Definition(s)

Lay-Up

Operation of helically assembling (SZ where appropriate) electrical cores or optical fibres into a cable, or hoses, tubes, electric cables, optical fibre cables into a bundle or sub bundle. NOTE Sometimes referred to as “cabling”. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  

Lay-Up

A terminology used for vessels that are out of commission In this state the offshore vessel may be at anchorage or permanently moored in a safe harbour. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
Independent Verification Agent

Independent Verification Agent

Definition(s)

Independent Verification Agent

Party or group independent from the manufacturer and the purchaser. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards  

Independent Verification Agent

Independent party or group, selected by the manufacturer, who can verify the indicated methodologies or performance based on the technical literature, analyses, and test results and other information provided by the manufacturer. NOTE The agent is also called upon to witness some measurements and tests related to material qualification. Source: API SPEC 17J, Specification for Unbonded Flexible Pipe, Third Edition, July 2008. Global Standards
Hydrogen Scavenger

Hydrogen Scavenger

Definition(s)

Hydrogen Scavenger

Gel material applied inside the tube (metal or polymer) holding the optical fibre to absorb hydrogen ions that prevent fibre from “darkening” and from reducing transmission capabilities. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Host Facility

Host Facility

Definition(s)

Host Facility

Fixed or floating facility to which the umbilical is mechanically and functionally connected and that provides the functions and services transmitted through the umbilical. EXAMPLES Platform, buoy, floating production system. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Functional Component

Functional Component

Definition(s)

Functional Component

Hoses, tubes, electric/optical fibre cables included within an umbilical which are required to fulfil the operational service needs. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards
Filler

Filler

Definition(s)

Filler

Item wholly or partially filling the voids between the functional components (3.1.23) with the purpose(s) of maintaining the relative location of the components, maintaining the shape of the cross-section, influencing the weight-to-diameter ratio, separating components for wear considerations, or providing a certain radial stiffness. Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards