Dexon’s Challenging Pipeline Inspection Archive

Case Study #521: Challenging Inspection of a 44” Gold Tailing Line in Southeast Asia 

The Challenge

• Receiver Absence on Sea Floor: 

• Tool Tracking Complications: 

• High Attenuation of UT Signal in HDPE: 

• Assessment of Data Repeatability: 

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Case Study #516:  36” Bi-directional metal loss and ovality inspection in heavy crude oil

The Challenge

• Combined bi-directional inspection in heavy crude oil

• Accurate tool tracking

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Case Study #471: Small Diameter (3”) Long-Range Unpiggable In-line Inspection in South America

With over 471 challenging pipeline inspections completed to date, Dexon Technology offers completely customized inspection solutions for the inspection of challenging pipelines. The following is a selection of challenging in-line inspection case studies from Dexon’s Challenging or “Unpiggable” Pipeline Inspection Archive.

The Challenge

• 3” small-diameter inspection of a long-range 32 km distribution pipeline (Typical 3” transfer lines run for only a few hundred meters in a single plant).

• Pipeline characteristics such as weld penetration can cause significant internal diameter restrictions in small-diameter pipelines.

• A lack of previous inspection data with this being the first inspection for this pipeline.

• Online inspection required.

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Case Study #327: S(P)BM Loading Line In-Line Inspection

The Challenge:

• Standard inspection calls for Bi-directional inspection requiring extensive support equipment

  • Surface support vessel

  • Onshore and offshore pumping stations

  • Onshore pumping medium storage tank and offshore slop tank

  • Pumping medium treatment

• Single direction inspection required

• Online inspection required

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Case Study #276: Multiple diameter underground road crossing pipelines

The Challenge

• Multiple internal pipeline diameters

• Back-to-back bends

• Lack of launchers and receivers

• Absence of prior inspection data

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Case Study #087: 17 Short-Length Urban Road Crossing Pipelines

The Challenge:

• No Launchers/Receivers

• High number of short pipe sections

• “Low cost” simple solution required

• Time constraints

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