Why SA 240 Gr 316L is not listed in 4

[ahmadire]

Why SA 240 Gr 316L is not listed in Table UHA-44 but 304L is listed!?

 

[TGS4]

Good question. Why don't you ask the ASME Committee directly -

http://go.asme.org/InterpretationRequest

 

[j13m]

I would talk to your inspector about UG-10. I had a similar problem with the 317L alloy not in the UHA pipe list.

 

[metengr]

Maybe you could be the first to request a Code Case for use?

 

[ahmadire]

Metenger I didn't get the point unfortunately. Would you make it clear?

 

[ahmadire]

TGS4 Thanks for your offer

 

[metengr]

ASME B&PV Code uses Code Cases to allow use of new materials or proposed rules under certain condition to gain service experience or to provide an explanation back to you as to why a certain material cannot be accepted. To find more information please see one of the code books on code cases.

 

[ahmadire]

metenger does it convey that 316L or 317L are not accepted for this application and there is a story behind of that or it's just missed?

 

[metengr]

Maybe I can restate it this way, if the material is not listed with allowable stress lines it cannot be used for pressure retaining purposes. Unlisted material can be for several reasons, no interest for use (code case application) or unacceptable for pressure vessel service. I don't know which reason.

 

[SnTMan]

ahmadire, UHA-44 is about limits on post fabrication strain with / without heat treatment for the various materials. You will see that for the austenitics it is applied at design temperatures of 1000 F and up. Referring to Sec II, Part D, Table 1A, SA-240-316L (which is listed in Table UHA-23), maximum design temperature is 850 F, therefore the post fabrication strain limits of UHA-44 do not apply to 316L.

Regards,

Mike

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

 

[D2HANDLE]

Hello SnTMan...
Thanks for the post which seems very logical explanation of the reason 316L is not included in UHA-44.
However, could you please share your thoughs as to what happens if we apply the dual certified 316 / 316 L material?
The design temperature limitation in Section II Part D and post forming heat treatment requirement in UHA 44 apply with regard to 316 or with regard to 316L?

Regards,
D2HANDLE

 

[SnTMan]

D2HANDLE, when using dual certified material you have to treat is as one or the other. You cannot chose some properties from one grade and some from the other.

Regards,

Mike

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

 

[ahmadire]

SnTMan you are right.Table 1A at the end of ASME SEC II Part D is very helpful for this issue.Those material which are not listed in UHA-44 have a restriction of operation temperature and are listed in this table e.g. 316L which has a upper limit of 454 Deg. C. for operation and hence could not used in temperature in the range as stated in UHA-44.
Thank you

 

[SnTMan]

ahmadire, you can learn a lot about the Code just by reading it

Regards,

Mike

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

 

[Tony1t]

when Code Case 2577 is incorporated. The UHA-44 requirements only apply at elevated temperature for the 300-series austenitic stainless steels

 

[ahmadire]

Thank You for sharing your thoughts