The Largest Open Access Portal of Nondestructive Testing (NDT)

06:21 May-07-2004
tank's plate lamination- evaluation

hello.
does anyone know how to evaluate laminations that where found in first course of 30000 bls oil storage tank .

subject oil storage tank -30000 bls

first course content 12 plates-

for each one at ut survey have been found 7-20 areas affected by lamination wide fro 20 x20mm to 800 x 500mm at depthes from 5 to 10 mm - nominal thickness is 14-15mm.

is rejected or accepted
-i will send the original report

thanks daniel

07:41 May-07-2004
Re: tank's plate lamination- evaluation

There are UT techniques to determine if they are present - and the presence of those tentacles can GREATLY weaken the structure. Delaminations on their own, may be OK.

Hope that helps a little.

----------- Start Original Message -----------
: hello.
: does anyone know how to evaluate laminations that where found in first course of 30000 bls oil storage tank .
: subject oil storage tank -30000 bls
: first course content 12 plates-
: for each one at ut survey have been found 7-20 areas affected by lamination wide fro 20 x20mm to 800 x 500mm at depthes from 5 to 10 mm - nominal thickness is 14-15mm.
: is rejected or accepted
: -i will send the original report
: thanks daniel
------------ End Original Message ------------

06:49 May-10-2004
Re: tank's plate lamination- evaluation

Regards
Milt Deck

www.rangerinspection.com

02:31 May-11-2004
Re: tank's plate lamination- evaluation

Level 1 a Lamination is acceptable regardless of size so long as it is more than 1.8 x Square Root of D (inside Shell diameter) x tnom (where tnom is the nominal wall thickness)

If you need more specific assistance or an independnet evaluation please contact us.