Ask Your Mates Open Forum

Do you use HDPE Pipe or Concrete or Steel?

  • 1.  Do you use HDPE Pipe or Concrete or Steel?

    Posted 03 October 2018 02:43
    Just wondering what percentage of Sewer Pipes are made of HDPE?
    Can someone please give me an estimate percentage -  compared to PVC, Steel or Concrete pipes?
    Thanks
    -Luke


  • 2.  RE: Do you use HDPE Pipe or Concrete or Steel?

    Posted 04 October 2018 04:49
    We are using both Concrete and PVC pipes on our sewerage systems here in Dodoma-Tanzania. Dodoma or in my Country we never use Steel pipes on Sewer connection, and due to some cause we know it reacts with sewer direct during sewage flows.

    But the sewer pipes made by Concrete had been installed in 1978's and since then some of the Area where sewer installed had been shown some kind of eroded of the bottom pipes where sewer used to flow on it. And at some pipes had been collapsed due to ages for those Concrete sewers, and this situation had been given a hard time on operations nowadays.
    After seen this situation to be appeared in two Areas consecutively every year since 2008, we engaged on Plastic pipes called PVC and replacement had been done at every collapse occurred on those  sewer pipes.

    Up-to now we are using PVC for those sewers rehabilitation and also for all new sewer project to avoid repetition of mistake that had been done previously by installing Concrete sewer pipes.

    May be if you have any solution or if during the execution of those work something were forgotten to be mixed on the mixing of materials used to create those concrete sewer pipes which could made sewer pipes to be strong and not affected by sewage flows. please, Advice if any knows about the Concrete Sewer pipes.

    Regards
    Eng Mgunda
    Dodoma-Tanzania
    mgunda2010@gmail.com


  • 3.  RE: Do you use HDPE Pipe or Concrete or Steel?

    Posted 04 October 2018 20:39
    Not steel for sure.  Generally a dual wall PVC that has a truss between walls which is filled with concrete.  Not sure if that is unique to the US or not.  That is the standard for up to 450mm in many places.  Then often concrete for larger diameters.  Ductile iron for unique situations such as river or stream crossings where bolted joints are optimal.  Material choice is going to be specific to system conditions though, especially any sewer where there may be areas that are prone to creation of hydrogen sulfide, which you may know is corrosive to concrete.  And of course depth is an important design factor, especially with any plastic material.  Bedding also more critical for plastics.  I've not seen a lot of use of HDPE for sewers but can't say why.


  • 4.  RE: Do you use HDPE Pipe or Concrete or Steel?

    Posted 04 October 2018 21:02
    Concrete pipes (eg jacking pipe) for sewer applications typically have an HDPE, PVC or equivalent internal liner cast and anchored onto the surface. They may also use calcareous aggregate which increases acidic resistance.
    Steel pipes may also be internally lined with:
    Calcium aluminate cement EN14647 for biogenic corrosion resistance.
    Polyurethane Coating AS 4321

    ------------------------------
    John Meerabux
    Hygrade Water
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  • 5.  RE: Do you use HDPE Pipe or Concrete or Steel?

    Posted 04 October 2018 22:39
    Thanks Daniel, Evan & John,
    That's very interesting!
    Have you ever done/heard of any major sewer lines with HDPE Pipe?
    like these: acu-tech.com.au/systems/acu-sewer/

    Glad of your opinion why/why not HDPE Pipe is used for Sewers?