Patent · US Expired

UT detection and sizing method for thin wall tubes

US6772638B2 · kind B2 · utility

44Cited by

1References

9Claims

0Family size

Assignee

Framatome ANP · DE

Inventors

Russell M. Matney · Lynchburg, US
Mihai G. M. Pop · Alexandria, US
Joseph R. Wyatt · Lynchburg, US

Key dates

Filing date	Oct 30, 2001
Grant date	Aug 10, 2004
Priority date	—
Expiry date	Oct 30, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/2634
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for sizing cracks is disclosed using a combination of depth crack sizing methods to improve crack sizing accuracy for thin walled tubing and tight crack surface openings less than 0.001 inches for cracks of any depth. The tube or plate wall can consist of a single material or multiple metallic electrodeposited or otherwise intimately bonded layers of materials with different magnetic properties and the sizing method comprises known depth sizing methods such as shear wave, time of flight and the selective use of two unique depth sizing methods designated as Mode Converted Signal (MCS) and Full Skip Normalization (FSN) which provide correction factors for the known sizing methods.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.