Guided Wave Testing
Guided Wave Analysis LLC


Advantage of GWT GWT / LRUT Dispersion Curve Near Field & Dead Zone Inspection Range Brochure

Inspection Range

The most difficult question to answer in guided wave is the inspection range. How far can your system inspect? It depends on the capability of guided wave system (how strongly it generates torsional or longitudinal mode and how much it reduces the generation of flexural modes), defect size, and attenuation (operating frequency, geometric features of pipe, corrosion condition, pipe coating, insulation, depth of burial, and the nature and degree of compaction of the surrounding soil).
The following shows a photo and data of a MsS guided wave test for a 16-inch OD aboveground straight gas transmission pipeline. The guided wave can detect about a 2.5- percent cross-sectional area defect (marked with couplet in the bottom graph) located at about 493 ft after passing 18 girth welds.

Please see that the MsS data has high spatial resolution compared to other guided wave systems. With the below inspection we can inspect over 500 ft length of piping in one direction for detection of 2 to 3 % defects on straight bare or painted lines.
The inspection range and defect sensitivity depends on the type of probe used, guided wave system, operating frequency, and attenuation due to geometric features or insulation. With the strong generation of axial symmetric mode, MsS GWT system can detect 2% to 3% defects located at about 150 meter after passing 18 girth welds in a 16-inch OD aboveground straight gas transmission pipeline [Pipeline and Gas Technology, August (2006), pp 28-3 1].




RELATED TOPICS

GWT Training

Calendar of GWT Training Courses

GWT Equipment Rental

Detail information about MsSR3030R Rental

GWT Equipment Purchase

Contact Information for MsSR3030R Purchase

GWA Exhibition

March 15-19, 2015
NACE CORROSION 2015, Kay Bailey Hutchison Convention Center, Dallas, Texas

June 03-06, 2015
International Chemical and Petroleum Industry Inspection Technology (ICPIIT) XIV Conference, Crowne Plaza Houston Northwest, Houston, Texas.

October 26-29, 2015
ASNT Fall Conference 2015, Salt Lake Convention Center, Salt Lake City, Utah

Websites

Guided Wave Application Website for Boiler tube, Heat exchanger, plate, and bridge cable

Guided Wave Testing Europe Website in English, Spanish, German, Italian, and French language

Guided Wave Analysis LLC © 2007-
7139 Callaghan Rd, San Antonio, Texas 78229, USA
Tel: 1-210-842-7635   Fax: 1-210-251-3470