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Ensures girth welds in oil and gas pipes are right first time

26 May 2009

An internal weld inspection system has been launched by Optical Metrology Services Limited (OMS), that inspects the internal size and shape of girth welds on pipes that are destined for use in deepsea subsea oil and gas applications.

Ensures girth welds in oil and gas pipes are right first time
Ensures girth welds in oil and gas pipes are right first time

The technology can be deployed onshore and offshore at different stages of the pipe welding process. The tool can be used on corrosion-resistant alloy-lined pipe to identify sour ingress points, in both clad butt-weld and clad weld inlay applications. The tool can also be used to improve weld procedure development efficiency and to check the root weld and geometry before next passes are deposited.

The system can be mounted to a purge dam, with an integrated camera for positioning and inspection. Pipe can be inspected whilst it is being spooled onto a pipe laying vessel or during stalk fabrication/tie-in.
The OMS Internal Weld Scanning Tool comprises two main systems: a high quality digital colour camera with sophisticated optics and lighting, as well as a high resolution laser scanner. The tool can be used to detect a wide range of weld features.

The software also acts as a traceability tool. Inspectors can choose cross-sections around the pipe at regular angles and log any defects as they are found. The software automatically records all measurements, as well as typed comments from the inspector.

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