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The wire brush encircles the shaft and scours the interior of the pipeline. A scraper pig shown at the Trans-Alaska Pipeline System Visitors Center. In pipeline transportation, pigging is the practice of using pipeline inspection gauges or gadgets, devices generally referred to as pigs or scrapers, to perform various maintenance operations ...
Hydraulically activated pipeline pigging (HAPP) is a pigging technology applied for pipeline 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.
NiSource was founded in 1912 as the Northern Indiana Public Service Company, which merged with several other companies to become the Columbia Gas and Electric Corporation. Under the Public Utility Holding Company Act of 1935 , Columbia was forced to reorganize its subsidiaries and eventually spun off its electric utilities, becoming the ...
The Crane Group Companies (also known as Crane Group) of Columbus, Ohio, USA, is a holding company of operating units primarily involved in the manufacturing and distribution of building products. Products include wood composite decking and railing, exterior cladding products, vinyl fencing, OEM PVC profiles, wood doors and door-frames, and ...
The most recent was the 2010 San Bruno pipeline explosion that killed at least four people, injured 60 and more victims are still missing. [19] Portions of the San Bruno pipeline had been built in 1956. In ideal situations, pipeline inspection gauges or a “PIG” (see Pigging) is used to inspect and ensure the safe operation of natural gas ...
Background and origin of the term "pig": In the field, a device that travels inside a pipeline to clean or inspect it is typically known as a pig. PIG is a bacronym for "Pipeline Inspection Gauge". The acronym PIG came later as the nickname for "pig" originated from cleaning pigs (first designed pigs) that sounded like squealing or screeching ...
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