Oyvind Snibsoer
03-17-2003, 02:08 PM
The old thread at http://media5.hypernet.com/cgi-bin/UBB/ultimatebb.cgi?ubb=get_topic&f=1&t=006396&p= had gone a little off-topic so I figured I'd better make a new one.
I spoke to an experienced NDT inspector, i.e. Non-Destructive Testing (of metal constructions) about this a few days ago. He'd recently been involved in some X-ray work on a barque, the "Statsraad Lehmkuhl" which sails out of my home town. This is a steel hull with wooden decks etc.
He said that the problem with wood is that it is much too radioactive for X-rays. Simply put, the radiation from the wood will "smear" the photographic film used, making the pictures worthless. I believe he said that other inspection methods, such as ultrasound scanning, were also pretty worthless when there was wood in the vicinity of the steel. They eventually had to remove parts of the wooden deck to reveal severe rusting underneath.
Bottom line: You may as well pull'em.
[ 03-17-2003, 03:17 PM: Message edited by: Oyvind Snibsoer ]
I spoke to an experienced NDT inspector, i.e. Non-Destructive Testing (of metal constructions) about this a few days ago. He'd recently been involved in some X-ray work on a barque, the "Statsraad Lehmkuhl" which sails out of my home town. This is a steel hull with wooden decks etc.
He said that the problem with wood is that it is much too radioactive for X-rays. Simply put, the radiation from the wood will "smear" the photographic film used, making the pictures worthless. I believe he said that other inspection methods, such as ultrasound scanning, were also pretty worthless when there was wood in the vicinity of the steel. They eventually had to remove parts of the wooden deck to reveal severe rusting underneath.
Bottom line: You may as well pull'em.
[ 03-17-2003, 03:17 PM: Message edited by: Oyvind Snibsoer ]