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Career Discussions
Filipe Matta
NDT Inspector
ITG, Portugal, Joined Nov 2008, 2

Filipe Matta

NDT Inspector
ITG,
Portugal,
Joined Nov 2008
2
07:27 Nov-10-2008
Pressure Vessels

Thank´s everybody for your your help on EMAT.

i think Joe's right: the "convencional" way is better because it's well accepted and code approved.

Is there a reliable NDT to inspect a buried pressure vessel without unbury it?

tks for your help on this matter.

Filipe Matta


    
 
 Reply 
 
florin turcu
florin turcu
07:06 Nov-11-2008
Re: Pressure Vessels
You could use guided waves for cased pipes. Guided waves can be generated from a single position and will travel along the burried cased length. If the pipe is not cased- i.e. in direct contact with soil, the wave attenuation will be much greater.




    
 
 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
07:24 Nov-11-2008
Re: Pressure Vessels
Yes, if there is a opening large enough for a man to get in (with an air supply line and an electric hand lamp. You can do PT, MT and UT on the inside. Radiography cannot be done without access to the other side.

Swamy
NDT Guru

----------- Start Original Message -----------
: Thank´s everybody for your your help on EMAT.
: i think Joe's right: the "convencional" way is better because it's well accepted and code approved.
: Is there a reliable NDT to inspect a buried pressure vessel without unbury it?
: tks for your help on this matter.
: Filipe Matta
------------ End Original Message ------------




    
 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
07:14 Nov-13-2008
Re: Pressure Vessels
Filipe

Hopefully when reaching the decision to bury the vessel the engineers will have taken into account the difficulty of periodic inspection. Perhaps considering its construction, service conditions, corrosion potential a reasoned engineering decision was arrived at that it would not require periodic inspection. Then again maybe they just had a hole dug and dropped it in!!!

Cheers

Nigel


----------- Start Original Message -----------
: Thank´s everybody for your your help on EMAT.
: i think Joe's right: the "convencional" way is better because it's well accepted and code approved.
: Is there a reliable NDT to inspect a buried pressure vessel without unbury it?
: tks for your help on this matter.
: Filipe Matta
------------ End Original Message ------------




    
 
 Reply 
 
forexsystemprofi
Consultant,
Canada, Joined Nov 2008, 1

forexsystemprofi

Consultant,
Canada,
Joined Nov 2008
1
06:06 Nov-26-2008
Re: Pressure Vessels
Is periodic inspection really difficult?

----
Metatrader Expert ( http://iticsoftware.com ), Scalping Forex ( http://iticsoftware.com/scalping-forex.php ), Forex Trading Systems ( http://shop.profxtools.com )



    
 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
06:47 Nov-26-2008
Re: Pressure Vessels
Its not just a question of the inspection being difficult, all inspections need to be carefully planned and executed to obtain value. If taken out of service and drained of its contents an inspector can enter under safe work conditions (oxygen measurement), inspect and photograph the condition of the vessel.

It should be considered that design/commisioning engineers will not usually make a decision to bury a vessel which they think liable to damage because of the difficulty of any non-intrusive inspections, the need to remove it from service and drain its contents for internal inspection and the difficulty in carrying out any subsequent required repairs.

The best way forward is for consultation to determine possible damage mechanisms and potential outcomes. Such consultation may dictate an internal inspection and possible repair or the purchase or adaption of a replacement vessel.

----------- Start Original Message -----------
: Is periodic inspection really difficult?
: ----
: Metatrader Expert ( http://iticsoftware.com ), Scalping Forex ( http://iticsoftware.com/scalping-forex.php ), Forex Trading Systems ( http://shop.profxtools.com )
------------ End Original Message ------------




    
 
 Reply 
 

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