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Method for determining boiler tube cold side cracking and article for accomplishing the same

A pipeline and scanning device technology, applied in the direction of using ultrasonic/sonic/infrasonic waves, using sound waves/ultrasonic/infrasonic waves to analyze solids, using sound waves/ultrasonic/infrasonic waves for material analysis, etc., can solve the problem that the scanner cannot complete the circumferential scanning of pipelines, etc. question

Inactive Publication Date: 2014-04-16
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commercially available scanners cannot perform circumferential scans of pipes due to the pipe structure that forms the water wall

Method used

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  • Method for determining boiler tube cold side cracking and article for accomplishing the same
  • Method for determining boiler tube cold side cracking and article for accomplishing the same
  • Method for determining boiler tube cold side cracking and article for accomplishing the same

Examples

Experimental program
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Embodiment Construction

[0014] Disclosed herein is a portable scanning device for non-destructively testing pipelines. Pipes are part of the water wall and are commonly used in boilers and furnaces. The scanning device is compact and easily adapted for use with pipes of different diameters, and is particularly useful for scanning water wall pipes in steam generators (boilers). In one embodiment, a portable scanning device is used to determine cracks occurring at attachment welds located on the cold side of a waterwall pipe, particularly those occurring at attachment welds that are normally isolated and thus in the absence of Cracks that are not easily accessible with the separator removed.

[0015] The term "conduit" as defined herein includes closed channels through which fluids can be conveyed. The closed channel can have any desired geometry (when measured perpendicular to the axial direction of the pipe) and may have a circular, oval, square or rectangular cross-sectional area. Axial direction...

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PUM

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Abstract

Disclosed herein is a scanning device for performing ultrasonic nondestructive testing of a tube, comprising a housing; the housing having bottom surface that is concavely curved with cavities to accommodate a waveguide assembly and an encoder assembly; where the waveguide assembly comprises a waveguide and a probe that are in communication with one another; the waveguide having at least one surface that is contoured to match an outer surface of the tube; where the waveguide facilitates the transmission of ultrasonic signals into the tube generated by the probe; and where the encoder assembly comprises a spring loaded wheel that contacts the tube; and where the encoder assembly provides a signal indicative of a location of the probe relative to a position on the tube as the scanning device is moved in a direction of a longitudinal axis of the tube.

Description

technical field [0001] The present disclosure relates to a method for determining cracks in boiler tubes. In particular, the present disclosure further relates to a method for determining cold side cracks of a boiler tube, and an article for determining cold side cracks of a boiler tube. Background technique [0002] Boiler tube failures are the leading reason why fossil fuel power plants are forced to shut down. Due to various operating conditions such as heat, pressure and wear over time, boiler tubes eventually begin to fail by forming circumferential and axial cracks and experiencing wall thinning due to corrosion and erosion. When boiler tubes begin to leak, for example, steam escapes through the leak into the boiler environment. Unless the leak is found and repaired, the leak will continue to increase until the pipe eventually ruptures, forcing the power company operating the boiler to shut it down immediately. These failures have proven to be very costly for electr...

Claims

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Application Information

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IPC IPC(8): G01N29/04
CPCG01N29/225G01N29/2487G01N2291/0289G01N2291/044G01N29/043G01N2291/2634G01N29/041G01N29/2462G01B17/04G01N29/06G01N29/265
Inventor J·L·布里格纳L·D·基德R·E·鲁卡斯C·D·库尔
Owner GENERAL ELECTRIC TECH GMBH