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2644 views 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  Translate  Close   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  Translate  Close   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.         Reply  Translate  Close

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