where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

863 views
Technical Discussions
daniel iordache
daniel iordache
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




    
 
 Reply 
 
Richard Kazares
Richard Kazares
07:41 May-07-2004
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 ------------




    
 
 Reply 
 
Milt Deck
Milt Deck
06:49 May-10-2004
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




    
 
 Reply 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 278

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
02:31 May-11-2004
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.


    
 
 Reply 
 

Product Spotlight

Aerospace Systems - Automated Ultrasonic Inspection

USL are specialists in the design and manufacture of turnkey ultrasonic inspection systems for aer
...
ospace applications. From monolithic composites to complex honeycomb structures. This video shows just a few examples of what is possible, find out more at: www.ultrasonic-sciences.co.uk
>

AIS229 - Multipurpose Real Time System

Latest standard & automatic real time system developed by Balteau. The AIS229 has been designed to
...
do series inspection in a wide variety of industry. Composed of a shielded cabinet, 5 axis manipulator, x-ray generator and tubehead from 160kV to 225kV, a fl at panel & much more, the AIS229 is most certainly one of the most multipurpose RTR system available on the market.
>

Conformable wedge transducer

The conformability is obtained with a flexible membrane filled with water between the transducer and
...
the inspected component. The coupling between the membrane and the component requires a small quantity of water or couplant. The conformable wedge combines the acoustic performance of immersion technique with good coupling and low attenuation.
>

FAAST-PA! OEM Patented phased Array for high speed UT inspection

Multiangle, Multifocus, Multifrequency, Multibeam. Instead of stacking UT electronics and having m
...
any PA probes, FAAST-PA is able to transmit all delay laws within ONE single shot in Real time.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window