Shock load or high-pressure surge caused by sudden halting of flow in a pipeline or piping system.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Pressure wave created by the rapid closing of a valve on a flowing line or vessel.
Source: IADC UBO / MPD Glossary, December 2011. Global Standards