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 -

LECOEUR ELECTRONIQUE
The Specialist of electronics for ultrasonic testing.

1022 views
Technical Discussions
Abdulhamid Al-Akel
Engineering
Saudi Arabia, Joined Mar 2003, 2

Abdulhamid Al-Akel

Engineering
Saudi Arabia,
Joined Mar 2003
2
01:56 Mar-20-2004
U/G condition Assessment

We have Oily water drain U/G lines that were found severly corroded and started leaking contaminating soil. These lines are C.S and externaly PE wraped. Please advise on available NDT methods that can be utilized to assess the condition of these lines without excavation.


    
 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1252

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1252
07:12 Mar-20-2004
Re: U/G condition Assessment
To assess the best option more details are needed.
Diameter of pipe, wall thickness, the maximum bend that migh represent restriction of instrumentation put in the line, the presence of any fittings that migh restrict access and the length of line are a few that come to mind.

I have seen a small diameter pigging tool (I think it was an RTD instrument) and Oceaneering has a good selection of ROVs that could be useful too.

----------- Start Original Message -----------
: We have Oily water drain U/G lines that were found severly corroded and started leaking contaminating soil. These lines are C.S and externaly PE wraped. Please advise on available NDT methods that can be utilized to assess the condition of these lines without excavation.
------------ End Original Message ------------




    
 
 
Gary
Consultant
TWI, United Kingdom, Joined May 2001, 15

Gary

Consultant
TWI,
United Kingdom,
Joined May 2001
15
09:35 Mar-20-2004
Re: U/G condition Assessment
----------- Start Original Message -----------
: We have Oily water drain U/G lines that were found severly corroded and started leaking contaminating soil. These lines are C.S and externaly PE wraped. Please advise on available NDT methods that can be utilized to assess the condition of these lines without excavation.
------------ End Original Message ------------

Teletest® is a novel non-invasive long range ultrasonic testing method for the rapid survey of pipes, for the detection of both internal and external corrosion. Other types of defect may also be detected.

The principal advantage is that long lengths of pipe, up to 175m (575ft) in each direction, may be examined from a single test point.

The benefits are:

Reduction in the costs of gaining access to the pipes for inspection.
Avoidance of removal and reinstatement of insulation or coatings (where present), except for the area on which the test head is mounted.
The ability to inspect inaccessible areas, such as at clamps or sleeved or buried pipes.
The whole pipe wall is tested, thereby achieving a 100% examination.





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

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
08:25 Mar-21-2004
Re: U/G condition Assessment
This is one of those cases where you need a lot of details. In particular the issues over what degradation mechanism is occurring, reliability of NDE techniques to detect it and whether you need to size the damage. Access and cost become the next issues.

There are a number of techniques available.

Guided Wave UT is a screening option but effective ditance may be affected by access and the external PE coating.
Internal pigging tools will probbaly provide high quality data but you require access and they are not cheap.
There is a technique called No Pig from Germany which allows some screening with only contact at 1 km access points. Again it may not be cost effcetive.

Depending upon what you are looking at AE testing may also be able to produce effective data.

You need to consider a risk based screening approach with specific inspection selected at appropriate points.

Please contact me if you require more data.



    
 
 

Product Spotlight

GUL QSR1® Scanning

How do you measure pipe wall thickness without direct access to the area? QSR® Scanning - Guide Wav
...
e Quantitative Short Range Scanning.
>

PROlineTOP Plug & Play Ultrasonic inspection device

As Plug & Play solution it units all control and operation elements in a small housing and therefo
...
re replaces the typical control cabinet...
>

Ultrasonic tomograph for imaging of concrete structures А1040 MIRA

Applicable for concrete inspection allowing imaging of the internal structure of objects from conc
...
rete, reinforced concrete, different stones. The operation applies pulse-echo technique at one-side access to the object. The instrument is feasible for concrete inspection for searching conduct ducts, conduits, detection of foreign inclusions, holes, honeycombing, cracks and other concrete defects.
>

NEW! The PragmaPro Instrument Platform

The PragmaPro is based on a modular cartridge technology and supports various NDT instrument modal
...
ities such as UT, PAUT, ECT and many more. This new platform is based on a machined, powder-coated aluminum frame for shock-proofness, best sealing qualities and maximum heat dissipation. This is practical to extend the outdoor temperature range and/or to extend the power injected in the transducers. The PragmaPro is aiming at a very wide range of applications, such as weld scanning, corrosion mapping and composite testing.
>

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