ASME UN 12C
ASME UN 12C
(OP)
Dear Friends
We have got an old Carbon Filter Tank (atmospheric tank). It is operating at our facility since 1978. Now we want to replace it with a new tank. I have dug out the old manufacturing specification. It says that it was manufactured as per ASME UN 12C. I want to know what is this and if it is from old versions of ASME than what is its equivalent as per latest ASME Code.
Help needed.
Moiz Khan
We have got an old Carbon Filter Tank (atmospheric tank). It is operating at our facility since 1978. Now we want to replace it with a new tank. I have dug out the old manufacturing specification. It says that it was manufactured as per ASME UN 12C. I want to know what is this and if it is from old versions of ASME than what is its equivalent as per latest ASME Code.
Help needed.
Moiz Khan





RE: ASME UN 12C
gr2vessels
RE: ASME UN 12C
Doing a search for ASME 12, I found
ASME B12, COMPANIES HOLDING BOILER AND PRESSURE VESSEL CERTIFICATES OF AUTHORIZATION FOR USE OF CODE SYMBOL STAMPS NO. 20 - DECEMBER 1986
ASME B00012, SECTION XII: RULES FOR CONSTRUCTION AND CONTINUED SERVICE OF TRANSPORT TANKS *1.4 LBS*
ASME B00012N, Code Cases: Nuclear Components
I could not find anything more releavent. You might contact the ASME itself.
Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net
RE: ASME UN 12C
API 12C is the predecessor to the API 650 standard which covered steel storage tanks as early as the 50's. I am assuming your facility is a nuclear plant and perhaps the tank is (or was) safety related equipment. If safety related your specification may require elements of the ASME U and N stamp requirements in addition to the API 12C standard. Does this vessel have a nameplate?
As an example, many nuke plants (70's contruction) have for their Class C vessels, ASME Section VIII vessel nameplates with the letter "N" below the Code symbol meeting compliance with 1968 edition of Section III, Article 21 paragraph N-2115 which states the following:
Class C Vessels shall be stamped with the letter "N" below the Code U-symbol in the stamping shown in Fig. UG-118 of the Code
Just a guess...
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