Tuesday, March 15, 2011

Re: [MW:10359] Existing Tank

Agrawal,
 
How you prove the Integrity of the Tank ?
 
What is difference between the Pressure & Strength ?
 
Thanks & Regards,
 
K. Babu

 
----- Original Message -----
Sent: Tuesday, March 15, 2011 2:04 PM
Subject: Re: [MW:10354] Existing Tank

why strength of shell to bottom joint will be compromised if the qualified and approved welding process is followed and there are no visible defects in the weld?


----- Original Message -----
From: Ahmed Elias
To: materials-welding@googlegroups.com
Sent: Mon, 14 Mar 2011 18:00:57 +0530 (IST)
Subject: Re: [MW:10335] Existing Tank

to check the strength of shell to bottom plate


On Sun, Mar 13, 2011 at 6:01 PM, akshat agrawal <agrawalakshat@indiatimes.com> wrote:


what if complete bottom plate welds are vacuum box tested using soap solution?? in that case, what is the purpose of hydrotest??

Regards,


Akshat Agrawal

----- Original Message -----
From: K.Babu
To: materials-welding@googlegroups.com
Cc: srinu p
Sent: Sat, 12 Mar 2011 19:56:27 +0530 (IST)

Subject: Re: [MW:10296] Existing Tank


Hi


 


As per API 653  Cl 12.3 , you need to do Hydrotest,


 


 


Since replacing the bottom plate considered as an major repair you have to do hydrotest


 




 


On Fri, Mar 11, 2011 at 8:29 PM, srinu p <sree.dream6@gmail.com> wrote:




Dear All,


 We have two existing tanks ( 20 years old) 3 mtrs height and 5.7 mtrs dia.. Bottom plate thickness - 8 mm.


 


As per client requirement we have shift the tanks to another place and also they want to change the Bottom plate.


1. As per API standard  or any other standards, if we change the bottom plate, which type tests are required for bottom plate inspection. My opinion is Vaccum Box and DPI or MPI tests are enough? or Any other tests are required?




2.And also if we are using  same bottom plate UT thickness guage checking and VB, DPI/MPI tests are enough? Is it acceptable?


 


Please share your experience.


 


regards,


 


P.Srinu


 


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Thanks & regards,

K.Babu





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AHMED MUHAMMAD ELIAS
MECHANICAL ENGINEER

ASNT LEVEL II NDT INSPECTOR 

IRAQ :-+9647710951885,+9647503136603


PLEAS FEEL FREE TO CONTACT ME FOR ANY INQUIRY






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