Bundles and towed installation

Acronyms and Abbreviations

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PFD PFP PGA PGD

Penetrant flaw detection Passive fire prevention Peak ground acceleration

Permanent ground deformation pGMAW Pulsed gas metal arc welding (see STT) PI Plasticity index (clay soils) PIG Pipeline inspection gauge PIMS Pipeline integrity management system PIT Pull-in tool PL Pipeline Plastic limit (clay soils) PLEM Pipe line end manifold PLET Pipe line end termination PP Polypropylene PPA Pressure point analysis PPE Personal protection equipment PPF Polypropylene foam PPM parts per million PRC Pipelines Research Council PRISM

Pipeline reporting inspection system multimedia

PS psi PT PU PSV PUF PVC

Plow steel (for wire ropes)

pounds per square inch (1 psi ≈ 0.069 bar)

Pressure safety valve Point of tangency

Polyurethane

Polyurethane foam Polyvinyl chloride Polyvinylidene fluoride Post-weld heat treatment

PVDF PWHT

QA QC

Quality assurance Quality control

QC/DC

Quick connect/disconnect (coupling)

RA

Rock armour (cable)

RAO RAS

Response amplitude operator Remote activation system

RC RD

Reinforced concrete Relative density

RHS ROT

Rectangular hollow section (structural steel tubing)

Remotely operated tool

ROTV

Remotely operated towed vehicle Remotely operated vehicle ROV navigation (position fixing)

ROV

ROVNAV

ROW

Right of way

RP

Recommended practice Reference publication Recovery plan

RSJ RST RTK RTU RxV RT

Rolled steel joist (structural section) Releasable swivel tensioner

Radiographic testing Real time kinematic Remote terminal unit Receiver verify (DGBS)