Revision of Document IIS/IIW – 1033-89 ‘Information on practices for underwater non-destructive testing’ Prepared by Working Group 2 of Commission V - Quality Control and Quality Assurance of Welded Products
Aimed at producing hardware for ship hull inspections, this project focused on stereophotography, ultrasonic thickness gaging and flaw detection, and magnetic particle inspections. In each case, hardware was chosen on the basis of an extensive survey of users and manufacturers both in America and Europe. Modification and adaptation of off-the-shelf equipment was performed at NCSC in order to arrive at systems easily used by U.S. Navy divers, and tests were run to determine the performance of each system under laboratory and field conditions. The stereophotography system described is an inexpensive unit which produced photogrphs of excellent quality in spite of zero visibility conditions. Corrosion pit depths or fouling heights can be measured to approximately + or - 1/64 inch, and incipient paint blistering can be detected before the blisters pop. The ultrasonic equipment described provides audible feedback to the diver to assist him in positioning the transducer. Also, thickness readings and flaw signal amplitudes can be stored on computer tape. The magnetic particle inspection systems include permanent record techniques such as magnetic rubber and transferring magnetic particles to a variety of putty-like materials.
Revision of Document IIS/IIW - 1033-89 'Information on practices for underwater non-destructive testing' Prepared by Working Group 2 of Commission V - Quality Control and Quality Assurance of Welded Products
This book details the procedures and practices employed in underwater inspection of offshore structures for engineers and managers. It lays out the background requirements from an engineering and an operational standpoint.
This book is a collection of papers presented in the NDT Conference held on February 20-23, 1996 at San Diego, California. The conference provided an opportunity to share experience and provide additional input to the Federal Highway Administration.
Regulations have been established by the governments of countries bordering the North Sea which require annual inspection of offshore structures. This has resulted in a much more intensive use of nondestructive testing (NDT) techniques for underwater inspection than currently exists in the United States. This report presents a review of the NDT techniques and equipment currently used in the North Sea area and discusses some of the research being conducted in the UK and Norway to improve the quality of underwater NDT inspection. (Author).
Concrete will be the key material for Mankind to create the built environment of the next millennium. The requirements of this infrastructure will be both demanding, in terms of technical performance and economy, and yet be greatly varied, from architectural masterpieces to the simplest of utilities.Specialist techniques and materials for concrete construction forms the Proceedings of the three day international conference held during the Congress, creating with concrete, 6-10 September 1999, organised by the Concrete technology unit, University of Dundee.