An inspection of a pressure part after an accident

[lganga]

Dear colleagues

After a transportation accident of a trailer, the boiler economiser falled down and some structural parts of economiser were damaged. All the boiler is ASME I stamped. The boiler is assembled at site,so I have asked the owner for the inspection of the economiser with the presence of ASME inspector. Do we have to repeat the code test for stamp? If the boiler constructor is ASME approved , can he do the job of inspection and repair without any third part inspector?.
I will appreciate your comments
Luis

 

[metengr]

Luis;
No, you would not repeat the hydrostatic test because the economizer has been completed as a part under Section I Code requirements. The economizer structural supports will need to be re-inspected and repaired. If I understand your first question, the economizer once installed on the completed boiler will still be subjected to a final hydrostatic test. Regarding inspection, this is a contractual issue and make sure you have everything documented because most likely, the insurer of the transportation company will be paying for any inspection and re-work.

 

[lganga]

metengr
At least we need a leak test ,maybe Helium test for all the welds over the collectors and PT. Does the ASME inspector should be in place during this stages? or does he has to be after a leak test at design pressure. My idea is not to install the economizer before approval by ASME inspector.

 

[metengr]

You can conduct a shop leak test for information purposes but it is after the code hydrotest so nothing changes regarding stamping requirements. You do not need to have the AI involved with the added cost, I would have someone from your organization involved.

 

[chicopee]

If you have a chance, get a copy of the National Board Inspector Code (NBIC) and that will tell you if the repairs require a hydrostatic test.

 

[Duwe6]

I would do the Leak Test using water, at a pressure of 90% of MAWP. Helium is hard to do - requires a mass-spectrometer, and is overly sensitive for an Economizer.