ASME sec III subsection NC class 2 vs subsection NB class 1.

I have a Purchase order for nuclear material; it requires that the material must comply with ASME /BPV Sec III subsection NB class 1.
The Material I need is SA 182 316/316L Thredolet.

The C of C from from the final supplier references Subsection NB class 1., but when I trace the paper work back to the mill I think I have a problem.

Below is in the order from the mill to final supplier.
1)I find on the CMTR ( from the mill) the spec SA 182 and SA 479 along with others.(I need SA 182 316/316L) so far so good.
2) The C of C from the mill References ASTM A479/A276 316 cond A
3) Then I have a material test report from another test facility Material Spec SA-479 sa-276 type 316/316L.
4) Then I have another test report from a 2nd facility for grain size. BUT the reference is ASME sec III subsection NC class 2 ASME479/ASME SA276 type 316/316L.
5) Then I have a UT report with the specs ASTM 479 316/316L
6) Then I have a another C of C for processing but now the Material spec is SA 182 316/316L
7) My supplier references Subsection NB class 1 ASME SA 182 in the final C of C.

My Question is…. are ASME sec III subsection NC class 2 ASME479/ASME SA276 type 316/316L and ASME sec III Subsection NB class 1 ASME SA 182.somehow interchangeable?
These documents will be reviewed again, but I would like some Advice on this subject.
Any info or experience would be helpful

My Question is…. are ASME sec III subsection NC class 2 ASME479/ASME SA276 type 316/316L and ASME sec III Subsection NB class 1 ASME SA 182.somehow interchangeable?
These documents will be reviewed again, but I would like some Advice on this subject.
Any info or experience would be helpful

mikeqc1

Is your supplier is on your Approved Vendor List?
Is your supplier hold a Quality System Certificate issued by ASME?
If yes to above, you should have A Certificate of Conformance from your vendor certifying the material comply to the Class 1 requirement for that material specification. The Certificate of Conformance should also have the Quality System Certificate Number and expiration date.

From what I have read from your post, your supplier complied with your purchase order of ASME Class 1 material SA182 Grade 316/316L.

Regards,
leem817

So am i over thinking this?
I guess its im not sure exactly the code allows this.
At one point in the paper trail SA-182 is not specified,, yet all trace # and test# heat ECT is tracable.

tHE TESTING LAB PAPER WORK WHO TESTED THIS FOR OUR SUPPLIER HAS ASME III SUB NC CLASS 2

WE ORDERED NB CLASS 1
aRE YOU SAYING THAT ASME III SUB NC CLASS 2
ON THE MATERIAL TESTING LABS INSPECTION REPORT IS NOT A CONCERN, AND THEY DO NOT NEED TO REFERENCE WHATS ON THE fINAL C OF C FROM OUR APPROVED SUPPLIER AND PURCHASE ORDER?

If a fitting is made from sa-479
I should have recieved a PT report from the facility after machining right?

I think this is why the PT inspection is not required……. the following seems to exempt this fitting from examination. Do you agree?

NB 2500 EXAMINATION AND REPAIR OF PRESSURE RETAINING MATERIAL.

NB 2510 EXAMINATION OF PRESSURE RETAINING MATERIAL.
( a ) line 5 …….Seamless pipe, tubes, and fittings NPS 1 (DN 25) and less need not be examined by the rules of this sub article………….

think this is why the PT inspection is not required……. the following seems to exempt this fitting from examination. Do you agree?

mikeqc1,

Sorry for not responding soon. Busy.. busy... busy..

You are correct for small product exemption. Also I may added the Certificate of Conformance you received from your vendor should states " Materials supplied meet the ASME Class 1 (NB) and the material specification SA182-316/316L and no welding performed and should included the vendor QSC (Quality System Certificate) Number and expiration date.

leem817

Mike,

Besides the comments from Leem, I think his thoughts are alright, I could explain the SA-479 history.

If you purchase a fitting to SA-182, the supplier (MO, Material Manufacturer in this case) can machine a cylindrical fitting up to 4NPS from rolled bar material, as a Source Material. The bar could be SA-479 certified by the mill (source material manufacturer).

The fitting manufactuer will issue a CMTR, or COC for the SA-182 fitting. He may attach the source material certificate, but does not need to, he could also just copy the analysis on his certificate.
However, this must happen under his ASME QSC, or under the QSprogram accepted by the Ntype certificate holder who qualified him.

Dk