THE EXAMINATION OF WELDED JOINTS OF STEEL PLATES LESS THAN FIFTY MILLIMETERS THICK

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Ingenieria Quimica

OSTI ID:4805944

Hints for applying x and beta rays in order to obtain the best results when examining welded joints are given. The niost important factors to be considered are the clearness of the photographical image and ihc visibility or defects which is much better with x- than gamma -ray exposure- gamma Emitting radioisotopes are most effective for welded parts which are located in inaccessible places. In all cases, adequate radiation protection for the workers, according to international rules, should be assured. The approximate location of the welding seam should be indicated on the radiograph by placing lead letters on the place where a possible flaw is suspected. These letters also serve for identifying the radiogram. Of great importance for obtaining good pictures are the proper selection of photographic films; direction of radiation; prevention of secondary radiation by reflected gamma rays; observation of the correct distance between the radiation source and film; choice of the correct radiation source, namely, Ir/sup 192/, Cs/sup 137/, and Co/sup 60/ for quality of the picture can be determined by using a series of 50-mm long steel wires having diameters which increase from 0.100 to 1.000 mm. (OID)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-024058
• OSTI ID: 4805944
• Journal Information: Ingenieria Quimica, Journal Name: Ingenieria Quimica Vol. Vol: 6
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CESIUM 137
COBALT 60
DEFECTS
GAMMA RADIATION
INDUSTRIAL APPLICATIONS OF ISOTOPES AND RADIATIONS
IRIDIUM 192
JOINTS
LEAD
PERSONNEL
PHOTOGRAPHIC FILM
PHOTOGRAPHY
PLATES
RADIATION PROTECTION
RADIATION SOURCES
RADIOGRAPHY
STEELS
THICKNESS
WELDS
X RADIATION