WEF Discussions — Now on LinkedIn!

WEF is pleased to announce the creation of free LinkedIn groups associated with its technical discussion forum topics. Through these LinkedIn groups, members will be able to view and participate in discussions, as well as communicate with one another via direct messages. Share your experiences and knowledge, ask questions and respond to other discussions as frequently as you like!

You must have a LinkedIn profile to join a LinkedIn group; you can create your profile here. If you already have a LinkedIn profile, all you need to do is submit a request to join one or all of the following groups:

Water Environment Federation (Main) | Biosolids | Collection Systems | Nutrients | Stormwater 
Utility Management | Water Reuse | Water for Jobs | Watershed Management | Laboratory Practices 

RSS Feed Print
Cleaning force mains
Robert Ooten
Posted: Friday, August 5, 2011 3:32 PM
Joined: 8/5/2011
Posts: 2


Has anyone had experience with cleaning force mains by pigging.  Howand where was the pig introduced?  How much time wa sneeded? Who did the work?


Dean Falkner
Posted: Tuesday, August 23, 2011 6:13 PM
Joined: 6/21/2011
Posts: 11


Hi Bob:

 

We've used a pig to help on water main problems, but not a force main.  It worked, but we needed to create a pig entry point that was easy to access the main....valves were essential.  The foam pigs provide great options.

 

A challenge I have seen is that we use VFD's to control pump cycling.  In doing so, we ignore the minimum velocities of the force main.  Perhaps at night time, it's worth allowing the wet well to build-up...then use multiple pumps to create a scouring velocity.

 

Just a few thougths.

 

Dean Falkner