Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies

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 the fittings > Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies

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 > Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies