27 years old 60″ water pipeline

  • 27 years old 60″ water pipeline

    Posted by william on 28/11/2021 at 7:06 pm

    Dear All,

    I was asked by a client to look at a burried 60″ pipeline carrying water for the last 25 years over a distance of 450 km and come up with an appropriate inspection technique.
    this pipeline has the following:
    – 60″ diameter of Carbon Steel Internally Cement Coated
    – Pipe Thickness = 14.27mm (average)
    – Twin Pipes- A,B.
    – Steel Grade = X60 & X52

    About 50 bars on discharge of each station

    About 12,000 cubic meter per hour

    SIX Pupming Stations on each line

    – These are buried pipelines with Cathodic Protection system installed.
    – Water is flowing through these lines for the last 25 years.
    – Cement mortar is dropped through out the pipeline, restricting the flow now.
    – Every hundred or hundred fifty meters there is an expected heap of cement debris lying in the pipelines covering at 6 O’Clock position, about quarter to one third of the pipe diameter.
    Objectives:
    1-To study the metal thickness loss of 60” diameter pipelines without exposing the buried pipelines.
    2-To find out a good technology that can discover the locations where cement mortar lining is dropped.
    3-To study the possibility of internal cleaning , the dropped cement mortar lining

    Your feedback is very much appreciated.

    Mark Martinez replied 2 months, 1 week ago 2 Members · 1 Reply
  • 1 Reply
  • Pipeline Inspection

    Mark Martinez

    Member
    25/09/2022 at 7:14 pm
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    Hi Bro,

    Long Range Guided Wave Ultrasonic Testing is a cost-effective powerful screening tool for inspection of
    long lengths of pipe from single Inspection location. The screening identifies the areas of corrosion or
    erosion that may further subjected to more detailed inspections using other NDT Techniques.


    LRUT can be performed on pipes that are in-service, insulated and buried and in hard to access areas such
    as pipelines at high elevations. By utilizing the LRUT, resources and time required on excavation,
    insulation removal and scaffolding for conventional testing can be avoided.

    * Used to screen in-service pipes and pipeline over long distances

    * Inspect pipes with limited access from a single position

    * Pinpoint locations requiring further inspection

    Hope it helps!

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