Purchasing Raw Material per ASME

[H Cameron]

Hi Guys,
We are going to buy some fittings and flanges for a job based on Section VIII.
I want to know when I have for example an ASME B16.5 flange or an ASME B16.10 fitting. it shall be marked on the item we are going to buy? or we need to have any certificate regarding that from the vendor?

If we have any b16.5 150# flang at all which it is not as per ASME and we cannot use for our vessel?

Thanks

 

[EdStainless]

There are two parts to this. B16 spells out the design of the part, and then ASME SA calls out the material (composition, properties, testing).
You need both parts to have a compliant component.

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P.E. Metallurgy, Plymouth Tube

 

[SnTMan]

H Cameron, first you need to specify to the supplier what material you need, i.e. SA-105, SA-240-304, etc. Fittings most likely will be permanently marked, however some small fittings may not be. Third, the supplier needs to supply a Certified Material Test Report (MTR) for the part. Fourth, you need to retain the Mtr and keep track of where the part ends up in the vessel.

"Based on Sec VIII". Is it to be stamped or not?

Any flange meeting B16.5 is usable under Sec VIII, Div. 1. You have to insure the proper rating class is selected.

B16.10 appears to be a dimensional standard for valves, not fittings.

Regards,

Mike



The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[metengr]

SnTMan has it correct.

 

[H Cameron]

Thanks for your guide guys,

SnTMan,
I meant B16.9 sorry.

You know, in our stock I see some flanges without any toing about standard just marked as 150# RF
Some have marked like this: B16 150# RF
Some like this: B16.5 150# RF
And some completely like this: ASME B16.5 150# RF


It makes me confused. The last one should be perfect but what about the others?

If I have to have any certificate from the vendor about the dimensional standards. I mean there is anything about for example B16.5 in MTRs?

Thanks

 

[H Cameron]

Yes, it will be U stamped

 

[david339933]

MTRs are not required for flanges by Code, but may be mandated by your customer. Check out UG-93/UG-94.

 

[SnTMan]

H Cameron, I don't know offhand if the MTR references the flange standard or not, but...

Somebody, somewhere has to certify that the flange meets all requirements of the relevant standard. It might be in the form of a Certificate of Compliance Conformance (COC) from the manufacturer and / or the supplier.

Absent this certification, absent traceable MTRs, what you have in stock are some hunks of metal, as regards Sec VIII, Div.1 use.

Regards,

Mike

 

[david339933]

Mike,

I'm not sure what you are stating....neither COCs nor MTRs are required for UG-44 parts per UG-11.

 

[SnTMan]

david339933, I was speaking somewhat generally. A standard part as per an ASME standard has to meet the marking, etc, requirements of the relevant standard, including material marking. See for example B6.5, 4.0. See also UG-11(c)(8).

These markings alone will meet UG-11(c), and yes, no further paperwork is needed from the standpoint of Sec VIII, Div. 1.

The vessel manufacturer then becomes responsible for the part per UG-11(c)(9).

As you stated, MTRs may be mandated by the customer, and in my class of work always are. Likewise, C of C's are usually required.

The point I was trying to make was that the part in question has to be unquestionably shown to meet the requirements of its' standard, and if it cannot be demonstrated to do so, it is useless.

Sorry for any confusion.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[david339933]

I thought I might not be understanding clearly.

 

[SnTMan]

Always a possibility when conversing with me

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[H Cameron]

Thanks guys,

I use all of your discussions