ASTM 270 for use as SS Sanitary Tubing in ASME pressure vessel 1

[401laurent]

Hello ,
I have simple question, as ASTM 270 is not on the ASME Sect II Material list, I suppose that I can't use it in ASME job ,So, which SA material can substitute ASTM 270 sanitary tubing ?.
thanks.

Laurent.

 

[metengr]

What code book section are you using for your design? For pressure retaining material, ASTM A 270 is not permitted for Section VIII. Do you need 304, 304L, 316 or 316L????Look at SA 249 tubing specification.

 

[401laurent]

Hi metengr,
I'm using section VIII div.1 for design, for grade it doesn't matter 304L or 316 L, But I need sanitary tubing , is important for design application. I see SA249, is not sanitary,
Thanks.
Laurent.

 

[metengr]

Are you using this material within the pressure vessel itself or as tubing to convey fluids?

 

[401laurent]

we Are you using this material within the pressure vessel itself, as nozzle connection with try clamp , or some time as tubing line to convey fluids?
Thanks.
Laurent.

 

[metengr]

Install a 316L stainless safe ended nozzle to the vessel and once this is completed attach the ASTM A 270 tube material to the nozzle. This would be outside the scope of ASME Section VIII, Div 1.

 

[401laurent]

For ASME tubing or piping job, I think that ASTM 270 is not listed also in ASME B31.1 even it's outside the scope of ASME Sect VIII div.1
Thanks.
Laurent.

 

[XL83NL]

I would rather suspect ASME B31.3 to be used for the piping part (maybe chapter X). Is your piping under B31.1?

 

[metengr]

Laurent;
You can still use ASTM A 270 material for piping because it is under an ASTM material specification. Read the CODE. However, I doubt this would be a B31.1 power piping application; it could be under ASME B31.9 Building Services Piping. Again, you provide no detail on service conditions or application.

 

[401laurent]

Thanks,
my tubing is for convoying CO2 @ 100 psi to machine utilisation. but I have no more details from my client for this application

Laurent.

 

[innovation2]

Dual certify the material to an acceptable code material like Sa-249. Usually the tubing we order is certified to many different specifications. Call you vendor and ask for a MTR and check if the other material specifications are listed in the code and include a note on your drawing stating dual certification.

 

[TJOrlowski]

Innovation is correct. Either ask the mill / distributor to quote you with sanitary tubing to SA-270 that is also manufactured and certified to SA-249. If that does not work, purchase the tubing in SA-249 regular BA finish, and send the tube to an aftermarket polisher who can clean, polish, and certify the tube to A-270.

The latter should be relatively inexpensive if the former is not available.

-TJ Orlowski