Nondestructive inspection apparatus for heat-transfer tubes in boilers
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United States of America Patent
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-
Aug 15, 1989
Issued Date -
N/A
app pub date -
Mar 13, 1989
filing date -
Jan 30, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
When a measuring instrument is inserted through a header into a boiler heat-transfer tube so as to carry out inspection, a guide for insertion of the measuring instrument is positively and correctly aligned with a heat transfer tube hole of the header.
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