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 -

GB Inspection Systems Ltd.
A leading UK manufacturer of Ultrasonic Probes, Accessories, Supplier of NDT Equipment and more.

1592 views
Technical Discussions
Sibusiso MZILA
Engineering, Pipeline integrity
Transnet SOC Limited, South Africa, Joined May 2004, 12

Sibusiso MZILA

Engineering, Pipeline integrity
Transnet SOC Limited,
South Africa,
Joined May 2004
12
02:52 Sep-25-2007
Pipeline field inspections

I am an integrity practitioner for a petroleum & gas underground pipeline network operator company - I am therefore a client to NDT providers.
After in-line inspections we always dig up the events and call on NDT personnel to verify the events.
The events include wall loss, crack features, laminations, etc. and may be located sub-surface, externally and internally. We ordinarily ask for MT, RT & UT which I feel are all relative to the operator, rendering them subjective forms of testing.
I am therefore wanting to view any available portable objective equipment on the market we can employ especially for sub-surface and internal events. Our pipelines include 6", 8", 12", 16", 18" & 20".
It would be interesting to hear from other pipeline operators as well.


    
 
 
chris s
chris s
02:54 Sep-25-2007
Re: Pipeline field inspections
----------- Start Original Message -----------
: I am an integrity practitioner for a petroleum & gas underground pipeline network operator company - I am therefore a client to NDT providers.
: After in-line inspections we always dig up the events and call on NDT personnel to verify the events.
: The events include wall loss, crack features, laminations, etc. and may be located sub-surface, externally and internally. We ordinarily ask for MT, RT & UT which I feel are all relative to the operator, rendering them subjective forms of testing.
: I am therefore wanting to view any available portable objective equipment on the market we can employ especially for sub-surface and internal events. Our pipelines include 6", 8", 12", 16", 18" & 20".
: It would be interesting to hear from other pipeline operators as well.
------------ End Original Message ------------

i would disagree that RT is subjective. try having an outside 3rd party interprete the film.


    
 
 
trex
trex
01:06 Sep-26-2007
Re: Pipeline field inspections
----------- Start Original Message -----------
: : I am an integrity practitioner for a petroleum & gas underground pipeline network operator company - I am therefore a client to NDT providers.
: : After in-line inspections we always dig up the events and call on NDT personnel to verify the events.
: : The events include wall loss, crack features, laminations, etc. and may be located sub-surface, externally and internally. We ordinarily ask for MT, RT & UT which I feel are all relative to the operator, rendering them subjective forms of testing.
: : I am therefore wanting to view any available portable objective equipment on the market we can employ especially for sub-surface and internal events. Our pipelines include 6", 8", 12", 16", 18" & 20".
: : It would be interesting to hear from other pipeline operators as well.
: i would disagree that RT is subjective. try having an outside 3rd party interprete the film.
------------ End Original Message ------------

tried Long Range UT?



    
 
 
Sibusiso MZILA
Engineering, Pipeline integrity
Transnet SOC Limited, South Africa, Joined May 2004, 12

Sibusiso MZILA

Engineering, Pipeline integrity
Transnet SOC Limited,
South Africa,
Joined May 2004
12
02:28 Sep-27-2007
Re: Pipeline field inspections
----------- Start Original Message -----------
: : : I am an integrity practitioner for a petroleum & gas underground pipeline network operator company - I am therefore a client to NDT providers.
: : : After in-line inspections we always dig up the events and call on NDT personnel to verify the events.
: : : The events include wall loss, crack features, laminations, etc. and may be located sub-surface, externally and internally. We ordinarily ask for MT, RT & UT which I feel are all relative to the operator, rendering them subjective forms of testing.
: : : I am therefore wanting to view any available portable objective equipment on the market we can employ especially for sub-surface and internal events. Our pipelines include 6", 8", 12", 16", 18" & 20".
: : : It would be interesting to hear from other pipeline operators as well.
: : i would disagree that RT is subjective. try having an outside 3rd party interprete the film.
: tried Long Range UT?
------------ End Original Message ------------

We ordinarily work on 'live' situations, i.e. pipeline full of flowing products and active cathodic protection.
RT works well in 'dead' situations.
Long range UT has not been tried, but question is what is the extent of the operator intepretation?



    
 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1219

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1219
03:48 Sep-27-2007
Re: Pipeline field inspections
I am not clear on what you might mean by "..I feel are all relative to the operator, rendering them subjective forms of testing."
If you represent the Owner then a well defined specification by your company should provide instructions to your service providers that can provide methods of quantitative assessment. As with any NDT examination there may be tolerances in the accuracy of the findings and SOME of these can be attributrable to operators. However, with well controlled parameters and a degree of mechanisation, these tolerances can be tightened to a relatively high degree. But do not be duped into expecting the impossible by unscrupuless service providers nor should you (as the specification writer) impose unreasonable expectations on "simple" NDT methods.
If you have been doing verification "digs" at suspect locations identified by pigging then you should not expect all locations to contain flaws. The pigging process itself may be at fault.


----------- Start Original Message -----------
: : : : I am an integrity practitioner for a petroleum & gas underground pipeline network operator company - I am therefore a client to NDT providers.
: : : : After in-line inspections we always dig up the events and call on NDT personnel to verify the events.
: : : : The events include wall loss, crack features, laminations, etc. and may be located sub-surface, externally and internally. We ordinarily ask for MT, RT & UT which I feel are all relative to the operator, rendering them subjective forms of testing.
: : : : I am therefore wanting to view any available portable objective equipment on the market we can employ especially for sub-surface and internal events. Our pipelines include 6", 8", 12", 16", 18" & 20".
: : : : It would be interesting to hear from other pipeline operators as well.
: : : i would disagree that RT is subjective. try having an outside 3rd party interprete the film.
: : tried Long Range UT?
: We ordinarily work on 'live' situations, i.e. pipeline full of flowing products and active cathodic protection.
: RT works well in 'dead' situations.
: Long range UT has not been tried, but question is what is the extent of the operator intepretation?
------------ End Original Message ------------




    
 
 
Michael Moles †2014 *1948
, Joined ,
00:19 Sep-28-2007
Re: Pipeline field inspections
----------- Start Original Message -----------
: I am an integrity practitioner for a petroleum & gas underground pipeline network operator company - I am therefore a client to NDT providers.
: After in-line inspections we always dig up the events and call on NDT personnel to verify the events.
: The events include wall loss, crack features, laminations, etc. and may be located sub-surface, externally and internally. We ordinarily ask for MT, RT & UT which I feel are all relative to the operator, rendering them subjective forms of testing.
: I am therefore wanting to view any available portable objective equipment on the market we can employ especially for sub-surface and internal events. Our pipelines include 6", 8", 12", 16", 18" & 20".
: It would be interesting to hear from other pipeline operators as well.
------------ End Original Message ------------

There is a lot of available pipeline inspection equipment on the amrket for you to review. Try Olympus's OmniScan and PipeSMART systems to start. There are also many monocrystal systems, e.g. EPOCH. Check our web site, or contact me directly.




    
 
 
Quintin Bower
Quintin Bower
03:27 Oct-01-2007
Re: Pipeline field inspections
Sonatest offers an extensive range of portable ultrasonic testing equipment, from conventional monoelement to multielement phased array units. Please visit www.sonatest.com for more information on equipment and distributors.


    
 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1094

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1094
06:13 Oct-08-2007
Re: Pipeline field inspections
Are you saying that after excavation the conventional NDT does not provide results matching with the pig defect log? If so, ccuracy of tracing of the pigging location markers is paramount, other wise you may be digging in the wrong place.

My thought is that its not so much expensive latest computerised equipment which is a necessity (though it may help), but rather thorough training of all those involved (not just the NDT technicians) in pipeline inspection and assessment. Many pigging companies present their results and leave the field without the necessary "after-sales" service to assist the pipeline operator to make sense of the MFL/UT/ET locations or indications. This is left to the NDT technician who has most probably not seen the pigging indication nor had any training in pigging operations and has only his own skills and experience to work with.

One would assume that oil and gas producers would spare no time, effort or money to ensure an accurate assessment of the condition of their principal (sometimes only) means of getting their product to the market, but that is in my experience far from the case. So witness what happens on the North Slope and perhaps many other locations.



    
 
 

Product Spotlight

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
>

NDTkit RT

NDTkit RT, TESTIA's Digital Radiography software The NDTkit product line software for X-ray analysi
...
s. NDTkit RT is a software benefiting from the Ultis kernel which is dedicated to radiographic image analysis. It offers a set of tools and filtering processes to assist RT operators in finding relevant flaws.
>

MUSE Mobile Ultrasonic Equipment

The MUSE, a portable ultrasonic imaging system, was developed for in-field inspections of light-weig
...
ht structures. The MUSE consists of a motor-driven manipulator, a water circulation system for the acoustic coupling and a portable ultrasonic flaw detector (USPC 3010). The MUSE provides images of internal defects (A-, B-,C- and D-scan).
>

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
>

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
s