Ultrasonic testing of seams

US4131026A · kind A · utility

Assignee

• Mannesmannrohren-Werke AG

Inventors

• Karl Ries · Mülheim, DE
• Dieter Kaiser · Dortmund, DE
• Klaus-Uwe Jannsen · Ratingen, DE

Key dates

• Filing date: Dec 18, 1975
• Grant date: Dec 26, 1978
• Expiry date: Dec 18, 1995

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2291/2675
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The seam of a pipe is tested sequentially from various directions and with differently directed test beams to search for differently oriented defects, and repeatedly for stepwise testing each portion of the same.