DI sewer force main lining
DI sewer force main lining
(OP)
In your experience, is double cement mortar lining with asphaltic coating adequate for sewer force main or would it be prefered some sort of epoxy liner/coating?
thanks
thanks
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
DI sewer force main lining
|
RE: DI sewer force main lining
RE: DI sewer force main lining
I am designing a baffle wall inside a concrete aeration tank. The baffle is to create a separate anoxic zone for the denitrification. Any suggestions regarding the material, construction and type of flow (over or under the wall)would be appreciated. Thank you
RE: DI sewer force main lining
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: DI sewer force main lining
I believe cast iron pipe has an even longer history of use in the USA, and I guess even most of the early stuff without protective linings. Information concerning this is available from the sites cispi.org and dipra.org, and from the former portal I noticed the quite interesting (though maybe at least some dated, as e.g. quite a few old pipelines are replaced at least due to inadequate size etc.) statement on the page at http://www.cispi.org/corrosion_resistance.htm that “Over 95 percent of all cast iron pipe that has ever been installed in underground service in the United States is still in use.” There are also some perhaps useful comments made on the FAQ #3 “Longevity” at http://www.cispi.org/faq.htm.
Does this mean that these materials are immune to all forms of chemical/biological attack? NO, as is explained on these sites, many other engineering references such as ASCE manuals etc., and as I explained briefly in my initial response there can be problems in some quite aggressive exposures (dictating other precautions). Durability or pipeline performance for all pipeline materials is of course dependent on specific exposures, and I will note on many other determining factors in the manufacturing, shipping/handling, construction and life cycle of pipelines.
I do not offer these comments to challenge you to furnish equal performance history (considering all aspects I talk about, and I suspect others maybe equally meaningful) for the e.g. “fusible” plastic pipes you propose as an alternate to what the original inquirer is using, nor do I ask you the question have there ever been any problems of any nature with plastic sewer pipes in general that may shorten their life spans. I believe all available materials should be given appropriate consideration.
However, given the overall body of work I do not think it is fair to claim or imply that a chosen traditional pipe will not last 25 years, and one may not necessarily want to "throw the baby out with the bath water" (so to speak).
RE: DI sewer force main lining
Richard A. Cornelius, P.E.
WWW.amlinereast.com