ASME SEC VIII DIV 2 , Nominal Thickness of Flanges

[azarpb]

Dear All
For my project client mentions that all forgings shall be UT tested in accordance with SA388 as specified in ASME Sec VIII div 2,part 3. In our Vessel which will will be U stamped we have a WNRF Flange of Dia 8". My question is when sec VIII refer nominal thickness of different hollow forgings, what would be the nominal thickness of my flange , is it the hub thickness tF

 

[racookpe1978]

Are looking at Fig 3.18 or 3.19?

I think you are reading a reference for pressure vessel wall thickness, but asking about nozzle flange thickness.

 

[azarpb]

Sir Actually My client project specification specifies that all forgings to be used in the vessel shall be UT tested in accordance with ASME SEC VIII div 2 as per SA388. So when I refer the code Part 3 for the details, it says that forgings of 50mm and above nominal thickness shall be UT Tested. So I am bit confused about the nominal thickness of flange about which it is referring. In same part 3 it defines that nominal thickness of hollow forging is radial thickness. When it says hollow forging does it incluse WNRF also. If not then what shall be considered the nominal thickness of flanges. Thank you for trying to help me

 

[SnTMan]

azarpb, I'm no Div 2 expert, but I seem to recall an (older) Div 2 article defining such as either the axial or radial thicknesses, the lesser of.

It is possible your client does not intend this requirement to apply to standard parts; I'd confirm and if so, ask the client to define the thickness.

Regards,

Mike

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

 

[azarpb]

Thank you SnTMan .Maybe asking the client is the only option .

 

[saplanti]

There is Catch 22 here. Codes are the minimum requirements for pressure equipment. In case the contract specification asks more test involvement from the manufacturer, the manufacturer must provide the test documentation for compliance.

In case you are still in negotiation stage you may clearly say you will be complying the code requirement with the exemption of that certain rule in the specification. The client may accepts this or not before the contract. The contract requires all the rules are to be complied.

Hope it is clear.

 

[212197]

hub thickness is not the thickness of flange. Pl. refer table 8 of ASME B 16.5.

 

[chonburi]

See para:3.2.9.1 and interpretation attachment