Patent · US Expired

Apparatus for ultrasonic inspection of the welding seam of large pipes

US4131027A · kind A · utility

2Cited by

7References

7Claims

0Family size

Assignee

Mannesmann AG · DE

Inventors

Wolfgang Terschuren · Mülheim, DE
Karl Ries · Mülheim, DE
Dieter Lather · Rheurdt, DE

Key dates

Filing date	Feb 10, 1977
Grant date	Dec 26, 1978
Priority date	—
Expiry date	Feb 10, 1997

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/2675
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A pipe is reeled onto and over a stand having several positioning rollers to serve as reference for the pipe inspection devices. These devices include a plurality of transducers for longitudinal flaw detection arranged in pairs and along opposite sides of the seam, the transducers being in water tanks hung in gimbals on individual swing arms. Four additional transducers for transverse flaw detection are arranged in a tank hung also in gimbals for positioning the tanks so that it engages the seam while the transducers are aligned with the seam. A gimbal hung tank with two edge probing transducers engages lastly the pipe seam.

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