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Technical Discussions
APPA RAO
NDT Inspector
ASNT, Oman, Joined May 2006, 1

APPA RAO

NDT Inspector
ASNT,
Oman,
Joined May 2006
1
11:31 Apr-05-2009
Exemption of Hydro test/Pneumatic tests

Are NDT tests/examinations can replace Hydro test/Pneumatic test of Pressure Vessels? If so which code?

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

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
22:03 Apr-12-2009
Re: Exemption of Hydro test/Pneumatic tests
In Reply to APPA RAO at 11:31 Apr-05-2009 (Opening).

Rao

if this is for new build vessels then you have problems getting around the requirements. Most codes pretty much insist unless the test poses a risk to the vessel or environment - for example hydrotesting a refractory lined vessel would be apoor choice. If this is for an in-service requirement post repair or replaceemnt you have more options. Look to API 510 to give guidance. You need to work with a pressure vessel engineer and NDE specialist to detrmine if the appied NDE can justify waiving the test.

    
 
 Reply 
 
R Duwe
NDT Inspector, API-510, 570, 653
MISTRAS, USA, Joined Jan 2009, 148

R Duwe

NDT Inspector, API-510, 570, 653
MISTRAS,
USA,
Joined Jan 2009
148
04:27 Apr-13-2009
Re: Exemption of Hydro test/Pneumatic tests
In Reply to John O'Brien at 22:03 Apr-12-2009 .

Mr. O'Brien covered this pretty well. For vessels already in service, API-510 requires the concurrence of a 510 certified Inspector [who has inspected your vessel] and a pressure vessel engineer. For new ASME vessels the Inspector would be the Authorized Inspector.

    
 
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