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Obscure Questions on a Section IX PQR

Obscure Questions on a Section IX PQR

Obscure Questions on a Section IX PQR

(OP)
I am reviewing a dissimilar metal PQR incorporating a partial joint penetration design and one unassigned base metal, SA-564, Grade 630 (aka 17-4PH). The unassigned base metal is thin and the weld only 1.5mm deep. The details are impeccably recorded (German, naturally) but I see no indication of tensile testing or bend testing. There is only a macro examination test, with extensive hardness surveys.
°
I have scoured the Code, including QW-202 and QW-451. My problems are:
1) I am straining unsuccessfully to find any exemption in Section IX from tensile & bend testing for PJP coupons.
2) Should the temper condition of the 630 base metal be relevant? It is not recorded on the PQR and not treated on the WPS, although I happen to know the product spec calls for H1075.
°
As it stands I cannot approve this WPS - am I missing something?

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: Obscure Questions on a Section IX PQR

IM,
Was there a PT or MT report with it ?
The reason I ask is I checked the old EN 288-3 (as it was a German company you mentioned) and the only mention of PJP was that a fillet weld coupon could be used to qualify a PJP.
The testing requirements for a fillet weld coupon (no mention of PJP) were PT or MT, Macro examination and Hardness tests.
Cheers,
Shane

RE: Obscure Questions on a Section IX PQR

(OP)
It is to ASME Code. VT, PT, and Macro exams were done.
°
It is just a thin sleeve lining the inside of a cylinder and welded around one end, so topologically the joint is no different than a fillet or a tube-to-tubesheet weld.
I would never consider qualifying a procedure using a PJP joint unless its unavoidable, so I had to revisit Section IX to be sure. But there's actually not much said there about PJPs, and nothing I can find to indicate that testing requirements are different than for a CJP.
°
p.s., metengr has been silent for a while - is he on hiatus in my hour of need?

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: Obscure Questions on a Section IX PQR

You are correct in your earlier comments regarding no listed exemptions from testing - I have checked interpretations as well and I can't find anything there either.
How can a partial pen weld actually comply with the ASME IX tensile requirements ? - it cannot meet the minimum tensile strength of the base metal if it is only partially welded.
And the face bend may pass but how could the root bend pass ?
A bit of a strange one.

RE: Obscure Questions on a Section IX PQR

There are no exemptions for tensile/bend testing for pressure retaining welds (non pressure retaining fillet welds would be the exception). Partial penetration welds can be tested, as the portion that is not penetrated is machined off of the tensile specimens and bend specimens. You only test the portion penetrated by the weld.

RE: Obscure Questions on a Section IX PQR

Thank you for the clarification CWEng

RE: Obscure Questions on a Section IX PQR

(OP)

Quote (CWEng)

There are no exemptions for tensile/bend testing for pressure retaining welds (non pressure retaining fillet welds would be the exception).
Does this come from a construction code?

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: Obscure Questions on a Section IX PQR

The non-pressure retaining fillet weld exception to tensile and bend tests? That comes from Section IX QW-202.2(c).

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