HDPE DR9 Installation Question

[owillis28engr]

Working on a project in Canada. Client preferred to use HDPE DR9. Contractor is saying that pipe has too thick of a wall thickness to fit into the butterfly valves. They are suggesting to transition from HDPE to carbon steel pipe up to/after the valve and then transition back to HDPE. They would apply an epoxy from a 3rd party company to make the pipe more friendly to be buried. I have not seen or heard of this before.

Any help answering this question would be greatly appreciate.

 

[HTURKAK]

You did not provide a lot of info. here. What is the size , test pressure of the pipe ? Can the use of flange adapters be considered ?
..

He is like a man building a house, who dug deep and laid the foundation on the rock. And when the flood arose, the stream beat vehemently against that house, and could not shake it, for it was founded on the rock..

Luke 6:48

 

[LittleInch]

"pipe has too thick of a wall thickness to fit into the butterfly valves."

What??

This needs a diagram as you don't normally insert pipe into a valve.

Doesn't make any sense at the moment, but DR9 will be pretty thick alright.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Kodiak31]

Does he mean the DR9 pipe wall will interfere with the rotation of the valve disc? I believe there are HDPE valve spacers made specifically to prevent this.