Definition of Permanent, Non-corrosive

[Hunt2871]

I am in the process of accepting several steel duct supports for a job in a nuclear facility and the manufacturer has attached printed decals to the steel as means of maintaining traceability. I have never seen this before...it is usually stamped or engraved in the steel (the duct work is done the same way with the decals). The specs spell out ASME AG1 Section SA 9000 which calls for "...non-corrosive permanent identification markings...". I want to accept the duct work and supports but I can't come up with any way to justify the use of a printed label as a permanent marking. This steel will be outdoors in an extremely harsh environment and I don't care what sort of material is used the ink and the decal itself is going to break down in the sun in a fairly short period of time (the steel has been in the laydown yard for 3 months and so far the labels are in good shape). And advice?