Overlay welding

[kalmari]

Hi,
Am I right that cladding pipes/tubes with stainless weld overlay goes under Code jurisdiction? Meaning if these pipes/tubes are to be used in vessels or boilers per applicable ASME Code the company performing overlay welding needs ASME stamp, issues data report etc. I assume that that these parts can not be handled as materials anymore under Sect.VIII or I.

 

[vesselfab]

welding on pressure containing parts

yes Certificate of Authority in correct code grouping also
needs Partial Data Report and Aproved WPS & PWR & Welder's Qualificatin log.

 

[DVWE]

the company performing overlay welding needs ASME stamp

I believe this work can be sub-contracted out to a company that does not have a U-stamp, but has WPS/PQR qualified to ASME Section IX. I'm not 100% sure, maybe others can provide further input.

 

[metengr]

Am I right that cladding pipes/tubes with stainless weld overlay goes under Code jurisdiction?

Yes.

Meaning if these pipes/tubes are to be used in vessels or boilers per applicable ASME Code the company performing overlay welding needs ASME stamp, issues data report etc.

The responsibility for the weld overlay is by an ASME Code stamp holder. This means that if the stamp holders QA/QC Manual allows for subcontracted welding, they have the responsibility for ensuring that the weld overlays are performed in accordance with ASME Section IX guidelines.

 

[JohnBreen]

Seems to me that if the vessel is in service the work is a repair and needs a National Board "R" stamp.

JB

 

[vesselfab]

you mean, that anyone without an ASME stamp can be subcontracted to work on code parts under someone else's code stamp as long as the stamp holder guarantee's the work.

I think that everyone should check this with their AI.

I have never heard of this. We subcontract weld overlay of small bore pipe all the time and have never approached it like that. It is the opinion of our AI that any welding on pressure part should be by stamp holder. We apply a partial stamp on all overlay and receive partial data reports.

 

[gr2vessels]

Clause (h)(2) of ASME VIII-1 said:
"(h)(2) As an alternative to nameplates or stamping, parts
5 in O.D. and under may be marked with an identification
acceptable to the Inspector and traceable to the Form U-
2 or Form U-2A Manufacturer’s Partial Data Report. Such
marking shall be of a type that will remain visible until
the parts are installed. The Code Symbol is not required".
This also includes the overlayed 2" nozzles you buy 'off shelf" from UK, Taiwan, Korea or Eastern Europe, without Code Symbol, but with lots of certificates of conformance with ASME IX, required as per ASME II SA 264. Certs endorsed by Lloyds, DNV, etc...
Partial data reports are also available (refer to UG-120(c), but no stamp, because the code says you don't need it.
Is the stamp required on the basis of AI's whim (each different) or is there a firm code requirement I'm not aware of?
At this stage I'll go along metengr.
Cheers,
gr2vessels

 

[vesselfab]

no code stamp "the actual stamp" but must have "partial data report"

Do you think and actual AI signs partial data report on work performed by contractors with no Certificate of Authority.

 

[stanweld]

As per metengr, the vessel Manufacturer (holder of the Certificate of Authorization) assumes all responsibility for the overlay subcontractor and assures that the subcontactor performs its work per the Manufacturer's Quality Manual.

I would not recommend this practice; better to award the subcontract to another stamp holder, who will document its work on the Partial Data Report.

 

[DVWE]

I would not recommend this practice; better to award the subcontract to another stamp holder, who will document its work on the Partial Data Report.

From a paperwork standpoint, yes.

However, just because a shop doesn't hold a U-stamp doesn't mean their quality is any worse. Especially in something specialized like weld overlaying.