Bundles and towed installation

Acronyms and Abbreviations

69

Subsea intervention valve Site of special scientific interest Standard temperature and pressure

SSSI STP SWL T&C TAPS TARA SW T&I

South west

Safe working load

Threaded and coupled (joints) Transport and installation (project) Trans-Alaska pipeline system

Tartan riser access

TD

Transmission and distribution

TDP TDR TDZ TEG

Touch down point Time reflectometer Touch down zone Tri-ethylene glycol

TFHE

Tactical fuel handling equipment Through flowline systems Glass transition temperature

TFL

Tg

TGP

Temporary guide plate

Ti

Titanium

TIG TLP

Tungsten inert gas (welding) (see GTAW)

Tethered leg platform Tensioned leg platform

TLWP

Tension leg wellhead platform (unmanned) Transverse mercator non-standard zone (see UTM) Tethered management system (‘tophat’ system for launching ROVs) Tension – number of cycles (fatigue – US usage) Tungsten metal arc welding

TM

TMAW

TMS

T-N

TOFD TOM

Time of flight diffraction (AUT)

Total oil marine

TP

Tangent point (between a straight and horizontal curve along pipe route)

TRB TRF

Through (or three) roller bending Thermal radiation flux Threaded riser and flowline Thermally-sprayed aluminium Top sliding bundle riser Tensile strength

TS

TSA

TSBR

TSJ TTR

Tapered stress joint Top-tensioned riser

UB UC U/C UD UDL UDW

Universal beam (structural steel section) Universal column (structural steel section)

Undercut

Uni-directional

Uniformly distributed load Ultra-deep water Ultrasonic inspection United Kingdom

UI

UK

UKCS UKOOA

United Kingdom continental shelf

United Kingdom offshore operators association

ULS ULSD

Ultimate limit state Ultra-low sulphur diesel