Magnetic Flux Leakage
| The magnetic flux leakage (MFL) technique is frequently used for in-service monitoring of oil and gas steel pipelines, which may develop defects such as corrosion pits as they age in service. Under the effect of typical operating pressures, these defects act as “stress raisers” where the stress concentrations may exceed the yield strength of the pipe wall. The main objective of MFL inspection is thus to determine the exact location, size, and shape of the defects and to use this information to determine the optimum operating pressure and estimate the life of a pipeline. Most MFL tools rely on active magnetization in which the pipe wall is magnetized to near saturation by using a strong permanent magnet, and the flux leaking out around a defect is measured at the surface of the pipeline |
|
No. |
Type |
Format |
Title |
Edition |
Description |
Author |
Priority |
Availability |
|
1 |
Paper |
|
AAIS-NDT-MFL-P-R0 Magnetic Flux Leakage Examination Procedure |
2018 |
This procedure defines the method to be employed by personnel when undertaking tank floor plate inspection using SILVERWING FLOORMAP3Di SYSTEM, in the thickness of 5 mm to 12.5 mm of mild Steel. |
N/A |
|
Free |
|
2 |
S |
|
2019 |
This Section of the Code contains requirements and methods for nondestructive examination (NDE), which are Code requirements to the extent they are specifically referenced and required by other Code Sections or referencing documents. |
ASME |
|
Upon Request |
|
|
3 |
HB |
|
1998 |
This volume on Leak Testing contains information on a wide variety of leak testing methods and their techniques, theory, equipment, procedures, and examples of applications that have been developed over the past several decades. Its contents will be helpful to those presently engaged in leak testing, those developing leak testing training programs, and those participating in leak testing training at all levels of competency. Attention is given to gaseous tracers used in leak testing, reference standard gaseous leaks, safety aspects of leak testing, pressure change and flow rate techniques for determining leakage rates, vacuum technology and leak testing of vacuum equipment, techniques of bubble emission leak testing, and techniques of helium mass spectrometer leak testing. Mass spectrometer instrumentation for leak testing is considered along with techniques of leak testing with halogen tracer gases, techniques of leak testing using ultrasonic vibration detectors, techniques of leak testing of hermetic seals and electronic devices, and applications of leak testing in the nuclear power industry |
ASNT |
|
Upon Request |
|
|
4 |
HB |
|
2004 |
This edition of the NDT Handbook on ET covers the latest developments in electromagnetic testing, with emphasis on digital technologies. Principles of theory, application and instrumentation are presented. Applications chapters for industrial sectors (primary metals, chemical/petroleum, electric power, infrastructure and aerospace) are included. Theoretical chapters explain that all electromagnetic techniques share the same physical principles. This volume is a must-have for Level II and III ET inspectors, inspection and quality personnel, those who evaluate or specify electromagnetic tests, researchers, students, trainers and teachers. |
ASNT |
|
Upon Request |
|
|
5 |
HB |
|
1996 |
This edition of the Nondestructive Testing Hand-book comprises ten volumes, 17,000,000 characters, 6573 pages and more than 5,000 illustrations. Three Handbook Development Directors (John Summers, Albert Birks and Roderic Stanley) managed progress of the edition through the Society's very active Handbook Development Commit-tee. Fifteen technical editors undertook the task of validating the technical content of documents covering dozens of sophisticated nondestructive testing methods |
ASNT |
|
Upon Request |
|
|
6 |
Paper |
|
ASNT - The Limitations of Magnetic Flux Leakage Scanning Of Aboveground Storage Tank bottom |
2014 |
Magnetic Flux Leakage (MFL) scanning can be an extremely effective method of detecting areas of isolated corrosion pitting in aboveground storage tank (AST) bottoms. This method has been proven to be effective by numerous different means (i.e., Ultrasonic (UT) prove-up, coupons) and has become the industry standard for assessing the condition of a tank bottom when an aboveground storage tank has been removed from service. However, the effectiveness of this inspection method is almost entirely dependent on the knowledge and experience of the MFL operator. The MFL operator’s knowledge of the theory of MFL as well as the MFL operator’s knowledge of his/her specific equipment is imperative, but something that is often overlooked is the limitations to MFL that are often present when scanning a tank bottom. Numerous limitations are often present on a tank bottom that can prohibit a thorough tank bottom scan. The objective of this paper is to educate storage tank owner / operators as well as MFL operators on these limitations in order to improve the overall quality of MFL tank bottom scanning. |
ASNT |
|
Upon Request |
|
8 |
S |
|
ASTM - E 570 - 97 - Flux Leakage Examination of Ferromagnetic Steel Tublar Products |
2004 |
This practice covers the application and standardization of equipment using the flux leakage test method for detection of outer surface, inner surface, and subsurface discontinuities in ferromagnetic steel tubular products (Note 1) of uniform cross section such as seamless and welded tubing. |
ASTM |
|
Upon Request |
|
9 |
Paper |
|
2014 |
This chapter discusses electromagnetic in-line inspection tools as they relate to pipeline integrity. It covers magnetic flux leakage (MFL), the most commonly used inspection technology for pipelines. MFL has been successfully used for nearly 50 years to detect, identify, and size metal loss due to corrosion. |
T. BUBENIK |
|
Upon Request |
|
|
10 |
Paper |
|
Factors That affect The Defect Sizing Capabilities of The Magnetic Flux Leakage Technique |
N/A |
This paper is concerned with investigating inherent Magnetic Flux Leakage (MFL) technology variables that affect the reliability, repeatability and accurate sizing of defects. External defect sizing factors such as a clean inspection environment are not considered. With such extraneous variables removed the effects on the MFL signal due to magnetic saturation, the calibration process and of defect geometry can be investigated. The results presented herein |
M. Boat, N. Pearson, R. Lieb |
|
Upon Request |
|
11 |
|
|
HSE - RR659 - Evaluation of effective NDT screening method for in service Inspection |
2009 |
The document is primarily intended for those with responsibilities in the planning. implementation and acceptance of sheening inspections tor engineering pant |
Doosan Babcock |
|
Upon Request |
|
13 |
S |
|
2011 |
This part of ISO 10893 specifies requirements for automated full peripheral magnetic flux leakage testing of seamless and welded ferromagnetic steel tubes, with the exception of submerged arc-welded (SAW) tubes, for the detection of imperfections. |
ISO |
|
Upon Request |
|
|
14 |
HB |
|
Magnetic Flux Leakage Inspection Tool for Pipeline Inspection |
1999 |
Shell Global Solutions in Amsterdam carries out tests on the performance of commercially available pipeline inspection tools, such as intelligent pigs, crawlers, external scanning systems and free-swimming inspection vehicles in the test rig at Shell Research and Technology Centre, Amsterdam (SRTCA). |
Tuboscope Vetco Pipeline Service |
|
Upon Request |
|
15 |
Paper |
|
2003 |
Pipeline operators now have a wide choice of inline inspection tools (pigs) that have the capability to deliver a consistently high-level of reporting of pipeline features and defects. The two main internal inspection technologies are magnetic flux leakage (MEL) and ultrasonic (UT). Each has its benefits; however, each has its inherent limitations and neither can identify all possible pipeline defects. |
PENSPEN |
|
Upon Request |
|
|
16 |
Paper |
|
N/A |
Magnetic Flux Leakage (MFL) and manual Ultrasonics (UT) have been used extensively for the detection and sizing of corrosion pits in ferrous plates and pipes. Users and providers of these inspection services may have different perceptions and expectations of the sensitivity and accuracy of the methods. This paper discusses the underlying principles of the methods and their effect on Probability of Detection (POD) and accuracy. |
N/A |
|
Free |
|
|
17 |
Paper |
|
Residual Magnetic Flux Leakage - A Possible Tool for studying pipeline defect |
2004 |
The magnetic flux leakage (MFL) technique is frequently used for in-service monitoring of oil and gas steel pipelines, which may develop defects such as corrosion pits as they age in service |
N/A |
|
Free |
|
18 |
Paper |
|
THE TRUTH ABOUT MAGNETIC FLUX LEAKAGE AS APPLIED TO TANK FLOOR INSPECTIONS |
N/A |
Magnetic Flux Leakage (MFL) Inspection techniques have been widely used in the NDT oil field inspection industry for over a quarter of a century for the examination of pipe, tubing and casing, both new and used. It is only in the last fifteen years that MFL inspection techniques have been applied to above ground storage tank floors in an attempt to provide a reliable indication of the overall floor condition within an economical time frame. In most cases, these MFL inspections are being carried out by industrial inspection NDT companies who do not have the depth of experience in the technique that most of the oil field tubular inspection companies have. |
N/A |
|
Free |
