Glossary
Technical Terms Used on This Site
Clear explanations of the technical terms used across this website.
A to Z
- Analyser shelter
- A climate-controlled enclosure that houses on-line analysers and their sample systems in a hazardous area.
- Battery charger (DC UPS)
- Equipment that keeps a battery bank charged and supplies DC power to control and protection systems when mains power fails.
- Call-off
- An order released against an agreed supply contract, specifying quantity and delivery date.
- Custody transfer metering
- High-accuracy measurement used when ownership of a product passes from one party to another.
- DST (drill stem test)
- A test that measures the pressure and flow of a formation using tools run on the drill string.
- Decontamination
- Removal of hydrocarbons, chemicals or residues from equipment so that it can be inspected, repaired or returned to service.
- Explosion-protected (Ex) equipment
- Electrical equipment designed so that it cannot ignite a flammable atmosphere.
- FRP
- Fibre-reinforced plastic, a corrosion-resistant structural material used in piping, tanks and structures.
- HDPE lining
- A high-density polyethylene liner installed inside a pipe to protect it from internal corrosion.
- HRSG
- Heat recovery steam generator: a boiler that produces steam from the exhaust heat of a gas turbine.
- Hydrotest
- A pressure test in which a pipeline or vessel is filled with water to confirm its strength and tightness.
- IBC
- Intermediate bulk container, a reusable container of about 1,000 litres used to transport liquids.
- Liner hanger
- A tool that suspends a casing liner from the inside of the previous casing string in a well.
- Nitrogen purging
- Displacement of air or hydrocarbons from a system with nitrogen before commissioning or maintenance.
- PAGA
- Public address and general alarm system, used to make announcements and sound alarms across a plant.
- Pigging
- Running a device, known as a pig, through a pipeline to clean it, separate products or inspect the pipe wall.
- PLC
- Programmable logic controller, an industrial computer that controls machinery and processes.
- Pre-commissioning
- The cleaning, flushing, testing and drying carried out before a new system is started up.
- SDS
- Safety data sheet, the document that sets out the hazards of a chemical and how to handle it safely.
- UPS
- Uninterruptible power supply, which maintains power to critical loads during a supply failure.