27 years old 60" water pipeline
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 OClock 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.
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