Hi all,

It is a U stamped vessel, we have to add a stronger re-pad on it. The customer doesn't allow us to call it back, and we don't have on-field certificate. Anybody here knows something about this? Please give out your best suggestion. I really appreciate your assistance.

Wish you all the best

Jeff

Ask your AI, maybe you may obtain permit from ASME. Otherwise you may have Field extension only anticipating Joint Review.
Mauro

Hi Gonzaga,

Thank you for your quick reply. If we just need to add some gussets around the outside of nozzle, any chance can we get the hydro test waived? The vessel is installed in the system already.

Thank you

Jeff

It's an age old answer but holds true here, get your A.I. involved.

Is this add-on something that was missed in your fabrication or is it something that your client has decided after the fact?

I have had similar situation this year where client requested add-on lifting lugs & poison pads after installation by their employees. Nicely put, it becomes their A.I.'s jurisdiction and his sign off.

Dear Mr. Jeff

Your question is not much elaborative. However, i would like to share following points with you.

1. has Hydro test been performed for entire vessel in shop or field?

2. If, then under the Provision of NBBI (National Board of Boiler & Pressure vessel ) Hydro test can be waived, if vessel will be R-stamped.

3. you can perform Box type hydro to satisfy your client requirement.

With regards
Vishal Tailor

Thank you Vishal,

Yes we did the Hydro test in shop. The vessel was never put in service and we don't have R-stamp. What is the BOX type hydro. Thank you.

Jeff

We miss the external loads. we need add gussets on nozzle per new calculation. We want to go to on site to fix the vessel by ourselves. What is the right way to do this? Thank you

Jeff

Hi Jeff,

Do you have an "R" stamp? This would allow you to add gussets to the nozzle in the field. Your A.I. would have final say on the hydro test. He may deem the add-on as a routine repair and not require a hydro test, or even waive the R stamping of the vessel.

Again, the only person that can give you a final answer is your A.I..

Another option is to have a local company with an R stamp perform the add ons.

Be sure to log this as an NCR for future audit/reviews.

Thank you Sooeey2u,

We don't have R-stamp. We don't have on field certificate either. This vessel have never been put in service sofar. Do I have to document this with NCR? I think shop activities have be completed.

Thanks again

Jeff

Jeff,

We hold a U and PP stamps and both state "Manufacture of pressure vessels at the above location only" and "Fabrication and assemby of pressure piping at the above location only" respectively.

We also hold an R stamp for the purpose of repairing or altering the above and it states "Metallice repairs and/or alterations at the above location and extended for field repairs and/or alterations controlled by this location."

If as you said that you "missed" the external load calcs and now need to add-on the gussets, imho you would need to document this as an NCR with a disposition that you will add-on gussets parts to nozzle. A sign off by your A.I. is required on all NCR's before proceeding with dispostion.

What is your A.I. saying about all of this?

Robert P.
QA Manager

Hi Rob,

I didn't inform AI yet. I need final result from engineering. The nozzle was designed for the internal pressure only. We have to do something to held the external loads. Thank you.

Jeff

Jeff, from your other post I can see you are not quite clear how the problem is being handled by your design engineers. As I already told you, there's a number of requirements, some of them mandatory, some not. Find out the details, what conditions fail, describe it here, and some way out can be found, I'm sure. It's just a matter of clarity, as nobody has a crystal ball, and you won't get an answer to a question as long as you don't ask it.

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Konrad Anikiel

Hi,

Yes, you are right. I am really new in this industry that was why i always raise stupid questions here. Here is my last question on this Topic. The customer wants to use their contractor to fix the vessel. What should we do besides waiting for the back charge bill. Do I need open NCR, inform AI or what? Thank you all.

Jeff

If I understand correctly, the Client has a contractor with an R stamp to perform add-on work?

In order to control costs, I would request that I send an QA Representative from your company to verify work & actual man hours on the job.

I would still record an NCR stating incomplete design calcs requiring the disposition of adding gussets to nozzle and definitely notify your AI.

It is not a bad thing to have NCR's, everyone makes mistakes, its how you addressed them.

Robert P.

If I was you, first of all I would put all efforts to solve the problem on paper rather than in steel. From what you've described, it's not certain whether you really need those gussets. But I'm not you...

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Konrad Anikiel