Concrete filled steel pipe inspection using electro magnetic acoustic transducer (EMAT)

2005 ◽  
Author(s):  
Won-Bae Na ◽  
Tribikram Kundu ◽  
Yeon-Sun Ryu ◽  
Jeong-Tae Kim
Keyword(s):  
Steel Pipe ◽  
Pipe Inspection ◽  
Acoustic Transducer ◽  
Electro Magnetic

The Application of Laser-EMAT Technique Used to Testing Defect in Rail

2014 ◽  
Vol 875-877 ◽  
pp. 574-577 ◽  
Author(s):  
Yang Zhao ◽  
Zhong Qing Jia ◽  
Guo Rui ◽  
Jian Ma ◽  
Jiang Feng Song ◽  
...  
Keyword(s):  
Quality Control ◽  
Signal Processing ◽  
Early Detection ◽  
Nondestructive Test ◽  
Testing System ◽  
Testing Method ◽  
Acoustic Transducer ◽  
Nondestructive Testing Method ◽  
Electro Magnetic ◽  
Industrial Context

Nondestructive test systems are increasingly applied in the industrial context for their strong potentialities in improving and standardizing quality control. Especially in the service stage of rail, early detection of nucleus defects in the rail can avoid the broken rail accident. The aim of present work is to propose a kind of non-contact nondestructive testing method based on the laser and electro-magnetic acoustic transducer techniques, which is suitable to inspect the nucleus defects. This paper describes the testing system, principle and signal processing. The result shows the relative error of testing nucleus defects is about 3.24 %.

Status of stainless steel pipe inspection in the US

1987 ◽  
Vol 28 (1-5) ◽  
pp. 295-305
Author(s):  
G.J. Dau ◽  
M.M. Behravesh ◽  
S.R. Doctor
Keyword(s):  
Stainless Steel ◽  
Steel Pipe ◽  
Pipe Inspection ◽  
The Us ◽  
Stainless Steel Pipe

The Study on Defects of 6-Inch Cylinder by Electro Magnetic Acoustic Transducer (EMAT)

2011 ◽  
Vol 4 (3) ◽  
pp. 1062-1066 ◽  
Author(s):  
M. K. Chang ◽  
Z. L. Lin ◽  
J. J. Jeng
Keyword(s):  
Acoustic Transducer ◽  
Electro Magnetic

Identification of Repair Coatings on Pipelines Using In-Line Inspection Technologies

2016 ◽  
Author(s):  
Andrew Greig ◽  
Jörg Grillenberger
Keyword(s):  
Cathodic Protection ◽  
Low Cost ◽  
Pipeline System ◽  
Acoustic Transducer ◽  
Coating Type ◽  
History Of ◽  
Electro Magnetic ◽  
External Corrosion ◽  
Weld Area ◽  
Inspection Data

One of the major issues in the pipeline industry is coating disbondment. A very large percentage of external corrosion and SCC is observed under disbonded coatings that shield Cathodic Protection (CP). This has been an ongoing issue with coated and cathodic protected pipelines since the initial use of these two protection methods. The various coating types and their typical failure scenarios, under various harsh environmental conditions, as well as their compatibility with cathodic protection when disbondment occurs, play a major role for recoating programs and selection of the coating type used for repairs and re-coating programs. With the continued development and improvements of the “Electro-Magnetic Acoustic Transducer” (EMAT) in line inspection technology it is possible to locate disbonded coatings, without the need of exposing the pipeline. This way operators can assess the condition of the coatings applied to their pipeline systems at a comparable low cost. Inline inspection tools equipped with the “EMAT” technology are also capable of identifying the various coating types and coating conditions.1 The coating type identification process is not limited to coating types applied to whole joints. Field applied coatings covering the girth weld area or coating changes within a joint such as repairs can be identified as well. In the presented case study, the challenge was the identification of different coating types used as repairs or for re-coating procedures, within the 60 year history of the inspected pipeline system. At the beginning of the project the main coating types and obvious repairs were identified based on EMAT in line inspection data. In a combined effort, operator and in line inspection vendor compared the initially identified coating types with the known repair history of this pipeline system. Based on this shared combined information the coating type analysis could be finetuned and additional areas could be identified as repaired or re-coated. The paper will outline different coating repair methods described by the operator and subsequently identified by the EMAT tool. This paper will also describe for each coating repair method the associated risks for the pipeline integrity.

Validation of EMAT In-Line Inspection Technology for SCC Management

2004 ◽  
Author(s):  
Meera Kothari ◽  
Stephan Tappert ◽  
Uwe Strohmeier ◽  
Jose Larios ◽  
N. Daryl Ronsky
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Crack Detection ◽  
Development Project ◽  
Tool Development ◽  
Service Interruption ◽  
Detection Tool ◽  
Acoustic Transducer ◽  
Electro Magnetic ◽  
Field Correlation

TransCanada has a need to manage sections of the pipeline that are susceptible to stress corrosion cracking (SCC) failure by periodically performing hydrostatic testing. Since hydrostatic testing requires a complete service interruption, In Line Inspection technologies (operating in gas pipelines without liquid couplant) are being investigated as an alternate method to managing this hazard. This requirement resulted in a joint technology and tool development project involving GE Energy and TransCanada. The EmatScan® Crack Detection (CD) tool is designed to detect and size longitudinally oriented external SCC features in gas-filled pipelines. During autumn 2002, the EmatScan® CD tool was run in a 64 km section of the TransCanada system. In 2003, field correlation excavations were conducted to assess the accuracy of the tool. This paper describes the results from the correlation program conducted to validate GE Energy’ 36 inch (914 mm) diameter EMAT (Electro Magnetic Acoustic Transducer) crack detection tool.

scholarly journals Characteristics of T(0, 1) Guided-Wave Point-Focusing Electromagnetic Acoustic Transducer for Pipe Inspection

2020 ◽  
Vol 20 (6) ◽  
pp. 2895-2903 ◽  
Author(s):  
Songling Huang ◽  
Hongyu Sun ◽  
Gongtian Shen ◽  
Baoxuan Wang ◽  
Qing Wang ◽  
...  
Keyword(s):  
Guided Wave ◽  
Pipe Inspection ◽  
Electromagnetic Acoustic Transducer ◽  
Acoustic Transducer

Development of 36” EmatScan® Crack Detection (CD) Tool

2002 ◽  
Author(s):  
Mark Yeomans ◽  
Blaine Ashworth ◽  
Uwe Strohmeier ◽  
Achim Hugger ◽  
Thomas Wolf
Keyword(s):  
Hydrostatic Pressure ◽  
Crack Detection ◽  
Pipe Wall ◽  
Joint Project ◽  
Natural Gas Pipeline ◽  
Detection Tool ◽  
Acoustic Transducer ◽  
Public Inquiry ◽  
Pressure Tests ◽  
Electro Magnetic

TransCanada PipeLines has been performing periodic hydrostatic pressure tests of natural gas pipeline sections susceptible to stress corrosion cracking (SCC). In 1996, the Canadian National Energy Board (NEB) held a public inquiry into SCC and recommended that industry develop a reliable SCC In-Line Inspection (ILI) tool. This paper describes the TransCanada and PII Pipeline Solutions project to jointly develop a 36 inch (914 mm) diameter crack detection tool based on EMAT (Electro Magnetic Acoustic Transducer) technology. The EmatScan® CD tool is designed to operate in gas pipelines without a liquid couplant. The EmatScan® CD tool will detect and size longitudinally oriented external SCC features. In 2001, testing of the technology has shown that it can distinguish: • insignificant pipe wall features (stringers, laminations and inclusions) from SCC defects; • internal from external pipe wall features. Off-line tests were performed by pulling the tool through a series of pipe spools containing SCC and other pipe wall features. These pipe spools are from two sections of the TransCanada system where PII’s UltraScan® CD tool was run. This joint project to develop a new ILI tool began in early 1997, and will be completed in 2002.

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