Menu
Home
People
Places
Arts
History
Plants & Animals
Science
Life & Culture
Technology
Reference.org
Hydraulically activated pipeline pigging
open-in-new
<p>Hydraulically activated pipeline pigging (HAPP) is a <a href="/facts/Pigging/4IbPMB0V">pigging</a> technology applied for <a href="/facts/Pipeline_transport/gEmKcFhD">pipeline</a> cleaning. The basic principle is that a pressure drop is created over a by-passable pig held back against a pipeline's fluid flow. The pipeline fluid passing through the pig's cleaning head is accelerated by this pressure drop, forming strong cleaning jets. These jets are directed onto the inner wall in front of the pig, removing all kinds of deposits. </p>