ACP or Transite Pressure Rating for potable water 1

[77JQX]

Hi all

I have a set of potable water system design drawings from 1979 that call for installation of '10" T-90 A.C.P. Transmission Main.' This pipe is currently subjected to working pressure in the 375 to 400 psi range. Can anyone steer me to documentation relating to pressure rating of this pipe?

Thanks!

 

[Ron]

To put it bluntly..."ain't no way ACP or Transite is capable of 400 psi!"

 

[bimr]

"Each asbestos-cement coupling sleeve shall bear the name or trademark of the manufacturer, nominal size, classification, and the letter T to indicate that it has been hydrostatically tested."

According to Page 9 of the NHCP publication, it appears that the pipe is classification 90 pipe with a working pressure of 225 psi and tested at an applied proof pressure of 675 psi.

ftp://ftp-fc.sc.egov.usda.gov/NHQ/practice-standards/standards/430bb.pdf

http://www.bcwwa.org/seminars/documents/4_Levelton_AsbestosCementACEvaluationProgram.pdf

According to the NATURAL RESOURCES CONSERVATION SERVICE CONSERVATION PRACTICE STANDARD (copied bwlow), the rated working pressure of the pipe is 337.5 psi.

"For pipelines to be used principally for conveyance, where adequate hydraulic analysis of surge, water hammer, or other
pressure change is made on the basis of anticipated operating conditions and where combined loading stresses are determined, a safety factor of not less than 2.0 may be
applied to the hydrostatic proof pressure and 1.5 to the crushing strength to determine the maximum design working pressure. The minimum acceptable working pressure
classification shall be 25 lb/in2.

This pipe should have beem manufactured according to the ASTM standard:

http://www.astm.org/Standards/C668.htm

 

[77JQX]

Thanks bimr! That's exactly what I needed.