X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1990-04-27
1993-02-16
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Absorption
378 58, G01B 1506
Patent
active
051877287
ABSTRACT:
A method of inspecting tube welds in tubular membrane panel walls whereby a radiation source if placed intermediate adjacent tube welds with radiographic film positioned along the far wall of each adjacent tube thereby covering the far wall critical area of each tube weld. Simultaneously each radiographic film is exposed to an intermediate radiation source thereby creating an actual size image of each tube weld with both images totaling or equaling at least one full weld being radiographed per exposure.
REFERENCES:
patent: 4924481 (1990-05-01), Vaughn
Church Craig E.
Edwards Robert J.
Hoelter Michael L.
The Babcock & Wilcox Company
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