How to do Local Hydro Test for Vessels?

Should we assume that a repair or alteration to a pressure vessel is being performed? If so, API510 may apply to your location. Certainly, your pressure vessel insurer and local laws and codes must be satisfied. I have seen caps temporarily welded to one side of the shell, which isolated a new nozzle for hydrotest. This may or may not apply to your case.

Can you please explain in more details which you seen.

You go first. I asked one question which you haven't answered. Actually, what I have used may not apply to you because a) it was 20 years ago, and codes change, b) the codes and standards I used may not apply to your location, which you haven't stated, c) my employer's insurer/code inspector is very likely not the same as yours, and d) the materials and construction details of the vessels I was working with are quite possibly different from yours. Why should I spend effort to provide more detail when you won't provide a better description of what you are trying to accomplish?

Yes, Explain more

Was this meant to respond to me or OP?

Sorry Bigg, Is a mistake. WP

Ask those individuals from whom the requirement has come.

No more information, is a new vessel for retest? Is a new vessel and you want to test in field? Is a field repair? is a U1 vessel? ...... What?

No where does Sec VIII Div 1 address alterations to pressure vessels in the field. Repairs and alterations to ASME B&PV after the signing of the Manufacturers Data Report are covered in the NBIC, Part RC 1000 and RC 3000. The NBIC will refer you back to the design code for the specifics, but both Sec VIII D1 (UG 99 and UG 100) and the NBIC ( RC-3030) require pressure testing.

• Investigate the repair that is required
• Procure or purchase a copy of the original U1-A report from either the manufacturer or The National Board
• Review the original U1-A to verify materials of construction, Fabrication requirements, Examination requirements, and Testing requirements
• Prepare a repair plan that includes a field traveler with hold points for the Authorized Inspector (AI)
• Identify the weld procedure to be used
• Identify the welder to be used and verify his/her qualifications
• Prepare any drawings, calculations, and or engineering data
• Procure and review documentation of any new material that must be utilized
• Specify and non-destructive testing that is required
• Specify any final inspection requirements
• Specify any Post Weld Heat Treat requirements
• Specify the type and range of any pressure test that is required
• Prepare a nameplate
• Prepare applicable R Form
• All of the above information must be available for the AI to review
• Perform the repair as stated in the repair plan
• Perform testing as required by the NBIC
• Sign off on the appropriate documentation

As you can see there is more to a "Code" repair the simply fixing the weld. Depending on the vessel the testing portion of the repair plan may take a substantial amount of time. Keep all of these items in mind when you call a company asking that a repair be made the same day as same day service tends to cost a little more. Here at Precision Pipe we jump at these opportunities to start new relationships that hopefully last a life time.

Differents Sources. WP

Good answer. I would just add that the alterer must hold an ASME 'R' stamp and this all assumes that ASME and National Board are applicable to OP's location.

Sorry... for delay.

It is a reactor ID 4300mm, material is 516 Gr.65N with SS clad inside, Design code:PD5500:2009 and Shell DEP31.22.10.32-Existing reactor( this info only given)

New nozzel-8" CS need to install and prefered local hydro.

Please provide, how to do local hydro for this nozzle.

( if we install cap inside and remove after hydro with flush grind, if there is any weld touch up required, then need to touch up- this is not allowed after hydro unless rehydro test)

And what pracise recommeded if can't do hydro test.

Carbon steel nozzle in stainless steel-clad vessel? Would the client and authorized inspector allow you to leave ('feathered in') some of the weld deposit so that you don't get into the cladding? The only possible alternative I can offer is to cap the exterior and do an 'external' hydrotest, with it's attendant complications. You haven't stated the vessel length and design pressure, so it isn't apparent how involved a 'full' hydrotest would be.

Well, the vessel will be on a General Register somewhere and subject to periodic inspection and test to satisfy the company providing burst indemnity insurance requirements. So the question needs to be addressed to the Engineer/Surveyor for that company in the first instance. So the first step is the last-issued insurance examination report for that individual's name and telephone number, and the next step is to make the call.

Carrying out a modification to a vessel that subsequently fails to satisfy that company to the point where burst indemnity insurance is withdrawn seems rather pointless, really.