Location

Brunswick, ME

Start Date

1-1-1997 12:00 AM

Description

Pipelines are pressure vessels. Their enviable safety record compares well with other transportation modes. Typical pipeline fatality rates are about 1% those of rail or air which are, in turn, about 1% of highway fatalities. Pipeline safety is first assured by rigorous inspection during pipe manufacture and line construction. All welds are inspected using radiography to detect voids and ultrasonics to sense cracks. Oil and gas transmission lines are normally buried, so in service inspection must be performed from the inside by pumping an inspection “pig” through the line. Magnetic flux leakage (MFL) pigs are the most cost effective tools for corrosion monitoring. They are propelled by differential product pressure from one compressor or pumping station to the next, which may be more than 100km away. They are self supporting, demand maximum data storage density and highest energy storage battery power supplies as well as advanced signal processing to obtain signal discrimination and data compression.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

16B

Chapter

Chapter 6: Material Properties

Section

Residual Stress and Texture

Pages

1731-1738

DOI

10.1007/978-1-4615-5947-4_225

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Effects of Stress on Magnetic Flux Leakage and Magnetic Barkhausen Noise Signals

Brunswick, ME

Pipelines are pressure vessels. Their enviable safety record compares well with other transportation modes. Typical pipeline fatality rates are about 1% those of rail or air which are, in turn, about 1% of highway fatalities. Pipeline safety is first assured by rigorous inspection during pipe manufacture and line construction. All welds are inspected using radiography to detect voids and ultrasonics to sense cracks. Oil and gas transmission lines are normally buried, so in service inspection must be performed from the inside by pumping an inspection “pig” through the line. Magnetic flux leakage (MFL) pigs are the most cost effective tools for corrosion monitoring. They are propelled by differential product pressure from one compressor or pumping station to the next, which may be more than 100km away. They are self supporting, demand maximum data storage density and highest energy storage battery power supplies as well as advanced signal processing to obtain signal discrimination and data compression.