Stamping "SS" on Flanges and Fittings

Dear sir,

If, one manufactures flanges/fittings
confirming to NACE

SPECIFICATION MR 01 75(CARBON 0.23% MAX,CARBON
EQUIVALENT 0.43 ,HARNESS

less than22 HRC FOR CARBON STEEL,normalized,no
welding done any part of job

IF I AM CORRECT ) AND FOR OTHER STEEL SUCH
AS ASTM A182 F 304 , 304 L , 316,

316L ETC. WITH CONDITIONS AS PER
MR0175. MY QUESTION IS WETHER ONE CAN STAMP

'SS' ON THERE FLANGE ? ALONG
WITH STANDARD MARKING AS PER MSS SP-25 i.e.

MANUFAURER'S LOGO , SIZE,
RATING , TYPE OF FLG. SCH. NO , STANDARD

(B16),MATERIAL ,HEAT CODE,
INSPECTION CODE AND 'SS' (FOR SOUR SERVICE

APPLICATION).

THANKING YOU,

V.D. DEODHAR