×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Water Line Corrosion Protection

Water Line Corrosion Protection

Water Line Corrosion Protection

(OP)
I have a few elements of a proposed water system which will need corrosion protection and the project specifications are calling out for a polysynthetic liner or wrap. Can anyone point me to any manufacturers that produce such a liner and provide a cut sheet with the products specs?

I heard from other engineers that this product comes in different thicknesses, however a manufacturer, Northtwon Company, out of California mentioned that 8 mil is whats required per AWWA standard and most commonly used. The company produces a 4 mil and 8 mil option. Both meet AWWA standards, however one is used more than the other. Are there any other thicknesses that are used? Any situation where one would be used over the other? Thanks

RE: Water Line Corrosion Protection

(OP)
cvg,
Thanks for your response. I am assuming that when you say that these are shipped with the pipe, that they are shipped with the pipe upon request for this liner?

In this project, I am basically producing shop drawings for the installation of the fire line and as part of the submittal, spec sheets (sometimes called cut sheets by the contractor) for materials and items to be used as part of the final system installation must be submitted for approval. Its a little different approach than producing design drawings.

By the way, I ended up calling out for 8 mil on our plans.   

RE: Water Line Corrosion Protection

I know what a cut sheet is, but never heard of a contractor or an owner asking for a cut sheet for polywrap.

RE: Water Line Corrosion Protection

There are many material, marking, and inspection etc. requirements for polyethylene encasement that are contained in standard ANSI/AWWA C105/A21.5 Polyethylene Encasement for Ductile-Iron Pipe Systems.  Per this standard also, upon request of the Purchaser the manufacturer of the encasement is to furnish also an Affidavit of Compliance that the encasement meets the requirements of this standard.  

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources