where expertise comes together - since 1996

Web's Largest Portal of Nondestructive Testing (NDT)
Open Access Database (Conference Proceedings, Articles, News), Exhibition, Forum, Network

All Forum Boards
Technical Discussions >
tank's plate lamination- evaluation
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

Materials Research Institute
Consulting to the NDT industry.

733 views
06:21 May-07-2004
daniel iordache
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
Richard Kazares
Re: tank's plate lamination- evaluation The issue with laminations - is not necessarily that they exist - there are many tanks and other structures with delaminations present. The issue is "Do they connect in some way?" I.E. do the seperate parallel delaminations - have "tentacles" that span the perpendicular directions between the individual delaminations.

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
Milt Deck
Re: tank's plate lamination- evaluation To comment on the problem we would like to see the original report.
RANGER Inspection Ltd specializes in UT services and tank inspections.

Regards
Milt Deck




 
02:31 May-11-2004

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
Re: tank's plate lamination- evaluation Look at API RP 579 Fitness For Service Section 7.

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.


 


© NDT.net - The Web's Largest Portal of Nondestructive Testing (NDT) ISSN 1435-4934

Open Access Database, |Conference Proceedings| |Articles| |News| |Exhibition| |Forum| |Professional Network|