Air tank stamping?

[Ike Carlson]

I have an older air compressor and don’t know what BRZ means on the tag. Are the seams brazed instead of welded? Is the whole tank bronze? (I wouldn’t think so)

Anyone know?

 

[Ike Carlson]

This is the tag

 

[cvairwerks]

Suspect it means that it was brazed, rather than welded, under sect U-69 of the code in use at that dated.