Evaluation of ultrasonic inspection techniques for the root region of girth welds. Report for project A.G.A. PR-220-9123
- Roentgen Technische Dienst bv (Netherlands)
A system for mechanized ultrasonic inspection of girth welds during pipeline construction, the RTD Rotoscan, has already been available for almost twenty years. In fact, its development started back in the seventies, after initial trials going as far back as the fifties. First commercial use started in the beginning of the eighties. Today, RTD Rotoscans are being used all over the world whereby, for a number of pipeline projects, it replaces radiography as a sole girth weld inspection technique. It has been known for many years, that the main difficulty in mechanized ultrasonic inspection of pipeline girth welds is in a reliable inspection of the root region. The objectives of this program were to: evaluate the merits of several mechanized ultrasonic insection techniquese; evaluate systems already suitable to fulfill the objective; establish possibilities and restrictions and to provide guidelines for their selection both technically and economically; and to indicate further development work for promising methods or systems which can be made suitable for field applications.
- Research Organization:
- American Gas Association, Inc., Arlington, VA (United States)
- Sponsoring Organization:
- American Gas Association, Inc., Arlington, VA (United States)
- OSTI ID:
- 442169
- Report Number(s):
- AGA--97003272
- Country of Publication:
- United States
- Language:
- English
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