Ultrasonic testing of weld seams of pipes for detecting transversely extending defects

US4305297A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Karl Ries · Mülheim, DE
• Kurt Hannoschock · Sonsbeck, DE
• Heinz Schneider · Düren, DE

Key dates

• Filing date: Aug 10, 1979
• Grant date: Dec 15, 1981
• Expiry date: Aug 10, 1999

Classification

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

Abstract

Ultrasonic test equipment for testing the welding seam a thick wall includes transducers arranged in tandem and along the welding seam, whereby a tandem pair inspects in any instance two surface-near zones (inner and outer surface) as well as an interior zone. One of the transducers of the pair participates in a function test. Two pairs cover the same zones, but from opposite sides.