CPC Subgroup
B21D 51/16 characterised by the use of the objects (making heat exchangers B21D53/02)
Full Title
Making hollow objects (from thick-walled or non uniform tubes B21K21/00) > characterised by the use of the objects (making heat exchangers B21D53/02)
7 direct subcodes
Child Classifications
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- B21D 51/18 vessels, e.g. tubs, vats, tanks, sinks, or the like
- B21D 51/24 high-pressure containers, e.g. boilers, bottles
- B21D 51/26 cans or tins; Closing same in a permanent manner (making outlet arrangements B21D51/38; welding or soldering B23K)
- B21D 51/36 collapsible or like thin-walled tubes, e.g. for toothpaste
- B21D 51/38 Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B21D 51/52 boxes, cigarette cases, or the like
- B21D 51/54 cartridge cases, e.g. for ammunition, for letter carriers in pneumatic-tube plants