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  1. Mechville

    Pre-stressing Expansion Loops During Construction

    Thanks everyone for the input! It sounds like it is largely a means and methods issue with no particular industry standard solution. Also now I know about the D9 technique! [tongue]
  2. Mechville

    Pre-stressing Expansion Loops During Construction

    I'm not familiar with the D9 method? Right, I understand that and I'm trying to determine how to compensate for the ambient temperature at the time of install. Can you elaborate on the proper way to compensate for the change? Thanks.
  3. Mechville

    Pre-stressing Expansion Loops During Construction

    "Was the loop designed assuming 70F to process temps and it's being installed in winter so they want to account for that difference?" Yes, exactly.
  4. Mechville

    Pre-stressing Expansion Loops During Construction

    I have designed an aboveground pipeline with an expansion loop to account for thermal expansion from ambient temperature. The client has requested information on prestressing the piping/loop based on the temperature at the time of construction. I'm generally aware that this is possible from...
  5. Mechville

    Pipeline deflection and Expansion Joint

    I recently inspected a pipeline suspended under a bridge. The pipeline has anchors and a single-end slip expansion joint at each end (for a total of 2 anchors and 2 expansion joints). On the east side, beyond the anchor, the pipeline 90s down and then 90s back to horizontal perpendicular to the...
  6. Mechville

    Cast Iron Tie-In

    Thanks everyone, I think that's the way to go!
  7. Mechville

    Cast Iron Tie-In

    We have an old 8" cast iron gas main system that we are replacing with PE piping, and the plan is to tee off from the existing cast iron pipe and then run HDPE parallel to the existing cast iron line. What's the best way to tee off of cast iron pipe? I typically work with steel piping where we...

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