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Over-the-counter

Over-the-counter, OTC, refers to the trading of co

Overpressure protection

Gas pipelines and piping systems must not be opera

Pack and draft

Pack and draft is the ability to store gas in the

Peak demand

Peak demand (also called peak load) refers to the

Peaking generation

Peaking generation runs during the peak hours (oft

Performance-based regulation

Performance-based regulation, commonly called PBR,

Petroleum electric generation

In regions with limited coal and/or natural gas su

Phase (in power systems)

Phase in a power system describes a full cycle in

Phasor measurement unit (PMU)

A phasor measurement unit, also called a PMU or a

Photoelectric ​effect

The photoelectric effect is a natural phenomenon i

Photovoltaic cells

Photovoltaic conversion generates electricity dire

Photovoltaic solar power

Photovoltaic, or solar, cells are semiconductor ma

Pig

Pigs are devices sent through the pipe to gather d

Pipe squeezing

An advantage to plastic pipe is that it can be squ

Pipe strength

Steel pipe strength is defined by the minimum yiel

Pipe strength equation for steel pipe

The relationship between operating pressures, pipe

Pipe toughness for steel pipe

Toughness is a measure of the resistance of the st

Pipe weldability for steel pipe

Weldability describes how easily high-quality butt

Pipeline quality gas

Pipeline quality gas is natural gas that has been

PJM Interconnection (PJM)

PJM is a regional transmission organization (RTO)