Technical Notes

• TN-22 (2001)- PPI Guidelines for Qualification Testing of Mechanical Couplings for PE Pipes in Pressurized Water or Sewer Service- Unavailable, pending revisions
• TN-27 2009 - Frequently Asked Questions: HDPE Pipe for Water Distribution and Transmission Applications - Unavailable, currently under revision. Contact PPI staff with questions
• TN-38 Bolt Torque For Polyethylene Flanged Joints.
• TN 46 Hydrostatic Universal Field Test Procedure
• TN-54 - General Guidelines for Squeezing Off Polyethylene Pipe in Water, Oil and Gas Applications