We have 30 entries in our Glossary for this letter.
Piping and Instrument Diagram
Prepare to Abandon Platform Alarm
PCD - Pitch Circle Diameter
The diameter of an imaginary circle drawn through the bolt hole centres on a flange; flywheel; coupling etc
PCG - Professional Contractors Group
A UK based body which seeks to represent contractors. Primarily IT based.
Plant Design and Management System
Software package used for plant design and creation of 3 dimensional models
European Union Pressure Equipment Directive (97/23/EC)
PES - Programmable Electronic System
A system for control; protection or monitoring based on one or more progamable electronic devices.
The system comprises all elements e.g. power supplies; sensors; actuators; communication paths etc.
Process Flow Diagram
Probability of Failure on Demand
Prevention of Fire Explosion and Emergency Response.
UK legislation relating to offshore installations which covers the area excluded by DSEAR.
PID - Proportional Integral Derivative
The 3 types of control action making up a 3 term controller. Commonly used for valve control.
A device used for cleaning a pipeline or separating two liquids being moved down the pipeline.
Intelligent pigs are fitted with sensors allowing measurement of corrosion and identification of pipeline defects.
UK Government's Oils and Gas Industry Task Force set up in 1998 to ensure that the UK's oil and gas industry remains competitive.
PLB - Personel Locator Beacon
Device issued to each traveler when traveling offshore on a helicopter.
It automatically emits a signal when submersed in the sea thereby giving potential for speedier rescue in event of helicopter ditching.
PLC - Programmable Logic Controller
Computer based monitoring and control package where control actions are primarily based on equipment and alarm status.
Project Management Consultancy
Used in relation to a contract e.g. a PMC contract.
Power Management System
POB - Persons on Board
Used in reference to the number of people allowed on offshore installations
Guide to Vantage Cards
A communications connection on an electronic or computer based device
PPE - Personal Protective Equipment
Collective term used for coveralls; gloves; hard hat; protective foot wear; accessories etc designed to create a barrier against workplace hazards.
Parts Per Million
Vendor-independent open fieldbus standard increasingly used in process control.
Standardised in IEC 61158 and EN50170
Production Sharing Contract
Process Shutdown System
psi - Pounds per square inch
A unit of pressure measurement.
If psia then the unit of pressure used when the zero reference is full vacuum and if psig the zero reference is atmospheric pressure.
Power Supply Unit
PSV - Pressure Safety Valve
A spring loaded pressure relief valve actuated by the static pressure upstream of the valve and characterised by rapid opening.
Physikalish Technische Bundesanstalt - Notified Body based in Germany
PTW - Permit to Work
A permit-to-work system is a formal written system used to control certain types of work that are potentially hazardous.
It allows work to start only after safe procedures have been defined and they provide a clear record that all foreseeable hazards have been considered.
PVC - Polyvinyl Chloride
A thermoplastic often used for piping systems.
PVC is stronger and more rigid than the other thermoplastic materials.
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