HDPE inserted pipe
HDPE inserted pipe
(OP)
HDPE pipe can be inserted into old underground steel or cast iron pipes used in water or gas distribution network, to save a total dig up and replacement. Other than checking of records, is there any other way of finding out whether a particular steel pipe has been inserted or not (eg say if some records are not 100% reliable)?
One way that I can think of is use a hot tap. If no water or gas is detected, then pipe has been inserted with HDPE pipe. But is there a better way?
Thanks in advance,
austsa
One way that I can think of is use a hot tap. If no water or gas is detected, then pipe has been inserted with HDPE pipe. But is there a better way?
Thanks in advance,
austsa





RE: HDPE inserted pipe
you might also try a pressure drop calculation, assuming that an HDPE liner at the same flow and roughly the same diameter would give only about 25% of the pressure drop you would get with an old steel inside surface.
I'd at least try those things before I hot tapped it.
From "BigInch's Extremely simple theory of everything."
RE: HDPE inserted pipe
RE: HDPE inserted pipe
The cost of a hot tap will be at least several thousand dollars.
There are companies that can do internal inspections with water mains in services.
htt
RE: HDPE inserted pipe
From "BigInch's Extremely simple theory of everything."
RE: HDPE inserted pipe
If the pipe is a pressure pipe the lining is returned at the flange joints or at least there is a special flange. I would check those first.
Stephen Argles
Land & Marine
www.landandmarine.com