"S" Stamped Fittings in Section I Piping

[boilerengineering]

Can anyone please let me know what the rules are regarding "S" stamp or name plate required when installing a flanged "in-line" of flanged "set-on" type interstage attemperator. The ASME Section I code does not specifically address this but am assuming to treat this as a valve whereas the name plate is sufficient.

 

[metengr]

boilerengineering;
Is this for new construction or on an in-service boiler? This does make a difference.

 

[boilerengineering]

metengr,

this is for new construction. but what would be the difference for in-sevvice.

thnx

 

[metengr]

Can anyone please let me know what the rules are regarding "S" stamp or name plate required when installing a flanged "in-line" of flanged "set-on" type interstage attemperator.

If the item above is built to Section I as a pressure part, a data report and S stamp are required.