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 -
1326 views
Technical Discussions
Matt Clark
Matt Clark
09:40 Mar-01-2001
Tank Inspection

I have a small dilema. Could anyone advise as to a specification or procedure for the on-line inspection of storage tanks for the oil inductry. I am aware of specifications API 653 & API-RP12R1, but do not have copies or familiar with them. We are conncerned with the thickness and corrosion conditions. I would welcome any comments regarding the standard requirements needed to satisfy a continuation of use. Thanks in anticipation.


 
 Reply 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 280

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
280
00:16 Mar-01-2001
Re: Tank Inspection
It will depend upon your jursdiction and which is the determining component of the tank.

653 gives clear guidance on external ultrasonic thickness measurement, plus visual and settelement figures for the shell and roof all of which are accessible on line.

The floor is usually the difficult area as it is not generally accessible in service.

API 653 deals with this on either a fixed shutdown interval or perform and RBI analysis to determine the relevent inspection interval.

There are other tools that can be used on line such as submersible robots ( very expensive) or Acoustic Emission.

EEMUA in Europe is the only agency to issue clear rules on the application of Ae for corrosion assessment of storage tank floors on-line.

Often you may want to integrate AE testing into an overall RBI analysis.

If you need more specific data please contact me.


 
 Reply 
 
S.V.Swamy
Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex , India, Joined Feb 2001, 787

S.V.Swamy

Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex ,
India,
Joined Feb 2001
787
03:11 Mar-01-2001
Re: Tank Inspection
: I have a small dilema. Could anyone advise as to a specification or procedure for the on-line inspection of storage tanks for the oil inductry. I am aware of specifications API 653 & API-RP12R1, but do not have copies or familiar with them. We are conncerned with the thickness and corrosion conditions. I would welcome any comments regarding the standard requirements needed to satisfy a continuation of use. Thanks in anticipation.

The thickness and corrosion measurements can be done with ultrasonic thickness gauges having a A-scan display in addition to the usual digital readout, so that the interface of the good and the corroded metals can be seen by its echo. Quantitative specifications of how much corrosion is acceptable can be found from the appropriate specifications and safety agencies. I will be happy to discuss more if needed - Swamy
.



 
 Reply 
 
Michael Trinidad
Consultant,
LMATS Pty Ltd , Australia, Joined Jan 2003, 138

Michael Trinidad

Consultant,
LMATS Pty Ltd ,
Australia,
Joined Jan 2003
138
04:19 Mar-02-2001
Re: Tank Inspection
To perform a tank inspection to API-653 requires several codes (API 575, 650, 651, 652, 653, 2015, 2207, ASME V and IX). The codes tend to refer to each other especially 653 and 650.

The new syllabii is available from the link below.


Kindest Regards


Michael Trinidad



 
 Reply 
 
Richard Kazares
Richard Kazares
09:16 Mar-02-2001
Re: Tank Inspection
In addition to manual methods, automated UT offers a resonable cost - and VERY rapid means of performing on-line UT inspection for tanks and many other similar strucutures. The many advantages of using automated systems is the ability to obtian full imaging data of your inspected areas - including very large areas if conditions warrant. The amount of information and insight into the material is significantly greater than through manual A-Scan techniques.

You can check examples of this type of inspection at our website at www.scanningsystems.com - which is now a part of NDT Automation.

: : I have a small dilema. Could anyone advise as to a specification or procedure for the on-line inspection of storage tanks for the oil inductry. I am aware of specifications API 653 & API-RP12R1, but do not have copies or familiar with them. We are conncerned with the thickness and corrosion conditions. I would welcome any comments regarding the standard requirements needed to satisfy a continuation of use. Thanks in anticipation.
.
: The thickness and corrosion measurements can be done with ultrasonic thickness gauges having a A-scan display in addition to the usual digital readout, so that the interface of the good and the corroded metals can be seen by its echo. Quantitative specifications of how much corrosion is acceptable can be found from the appropriate specifications and safety agencies. I will be happy to discuss more if needed - Swamy
: .
.



 
 Reply 
 
Azhatr Qadri
Azhatr Qadri
04:34 Apr-18-2001
Re: Tank Inspection
We are in the process in evluating the difference between Magnetic TFT and AE equipment. Please advise what is better in tems of cost and performance. Please also advise where one can purcahse these equipment second hand.

Regards

Azhar Qadri


 
 Reply 
 
John O Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 280

John O Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
280
09:33 Apr-19-2001
Re: Tank Inspection
You cannot compare TFT and AE they serve totally different functions.
You apply AE as a on-line Tank Floor condition assessment tool to determine when and on what priorities to shutdown a storage tank. It is a risk assessment tool.
This approach saves you money on not taking good tanks out of service too early.

TFT is something you need to do once the decision has been made to take the tank out of service and you use it to identify areas and extent of repairs.

There are a number of TFT Manufacturers
Silverwing UK
MFE Enterprises USA
AEA Sonomatic UK
Rosen Inspection Netherlands

Some have advantages and disadvantages based on plate thickness, reporting and internal floor coatings so choose carefully. Second hand equipment you may need to speak to the manufacturers or trawl the internet.

AE test equipment is much more specialised. The issue is not just one of recording data signals. Experience, interpretation and access to a database of past tests is much more important. Look at thereport on NDT Net from Shell under How Reliable Is AE tank testing ECNDT Denmark.

This higlights how important experience is.


 
 Reply 
 

Product Spotlight

CIVA 2017 UT Module

CIVA NDE Simulation Software is the world leader of NDT Simulation. The UT simulation Module incl
...
udes: - "Beam computation": Beam propagation simulation - "Inspection Simulation": Beam interaction with flaws or specimens The user can simulate a whole inspection process (pulse echo, tandem or TOFD) with a wide range of probes (conventional, Phased- arrays or EMAT), components, and flaws.
>

Immersion systems

ScanMaster ultrasonic immersion systems are designed for high throughput, multi shift operation in a
...
n industrial or lab environment. These fully integrated systems provide various scanning configurations and incorporate conventional and phased arrays technologies to support diverse applications, such as inspection of disks, bars, shafts, billets and plates. All of ScanMaster immersion systems are built from high accuracy scanning frames allowing for scanning of complex parts and include a multi-channel ultrasonic instrument with exceptional performance. The systems are approved by all major manufacturers for C-scan inspection of jet engine forged discs. Together with a comprehensive set of software modules these flexible series of systems provide the customer with the best price performance solutions.
>

NDT.net launches mobile-friendly design

NDT.net has revamped its website providing a mobile-friendly design.The front page received a comp
...
letely new design and all other sections are now reacting responsively on mobile devices. This has been a major step to make our website more user- friendly.
>

NovaScope 6000

The all-digital Novascope 6000 is a portable, ultra-high precision thickness gauge for high-speed
...
thickness measurement. Novascope 6000 has unmatched capabilities and unique features including: •Superior Resolution with high contrast, high-speed color RF display •High pulser voltage •Real-time video output •Increased internal/external data storage •Programmable SetUp features •Battery & AC Powered
>

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