CPC Subgroup
B21C 37/15 Making tubes of special shape; Making fittings
Full Title
Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape > of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes > Making tubes of special shape; Making fittings
9 direct subcodes
Child Classifications
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- B21C 37/16 Making tubes with varying diameter in longitudinal direction
- B21C 37/20 Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies
- B21C 37/22 Making finned or ribbed tubes by fixing strip or like material to tubes
- B21C 37/28 Making tube fittings for connecting pipes, e.g. U-pieces