The Re-Emergence of Spherical Pigs

January 2018, Vol. 245, No. 1

By Larry Payne, Director, Pipeline Equipment, Inc., Tulsa, OK

Many years ago spherical pigs were commonly used in natural gas pipelines to remove liquids –  mostly water and condensates. The launchers were designed to only handle spherical pigs, using special valves such as the Wheatley Launch Valve and the Fitzpatrick Launch Valve. These resembled a check valve and were designed to release one spherical pig at a time by movement clapper with a lever. Then, with the implementation of Pipeline and Hazardous Materials Safety Administration (PHMSA) requiring that high-pressure transmission lines be routinely inspected to prove integrity with inline inspection (ILI) tools, and with…

Join PGJ Insider

Want to Read The Full Article? Become a PGJ Insider for FREE!

Continue reading this exclusive article. Login Sign Up! Join Today!

Join P&GJ Insider
PGJ Insider Benefits
  • Receive Monthly PGJ eNewsletter
  • Access pgjonline.com Premium Content on (in-depth coverage; analysis; research)
  • Access PGJ Special Reports (e.g. PGJ 500)
  • Access PGJ Studies
  • Access PGJ Surveys
  • Access PGJ Whitepapers
  • Access PGJ Buyer’s Guide
  • Access PGJ magazine back-issues
  • Receive PGJ eMail Alerts – breaking industry news
  • Early invitation to PGJ Webinars
  • Early invitation to PGJ Events (e.g. Pipeline Opportunities Conference)
  • Enhanced no-charge listing in PGJ Buyer’s Guide

For over 150 years, Pipeline & Gas Journal (PGJ) has been the trusted source for information about the oil & gas pipeline industry worldwide. Join the Pipeline & Gas Journal (PGJ) community today as a PGJ Insider. Obtain access to valuable information and enhanced content. Receive important notifications.