B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
B21C37/06—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
B21C37/15—Making tubes of special shape; Making tube fittings
B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
B21C37/225—Making finned or ribbed tubes by fixing strip or like material to tubes longitudinally-ribbed tubes
B—PERFORMING OPERATIONS; TRANSPORTING
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
B23K9/00—Arc welding or cutting
B23K9/02—Seam welding; Backing means; Inserts
B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
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Engineering & Computer Science
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Mechanical Engineering
(AREA)
Physics & Mathematics
(AREA)
Plasma & Fusion
(AREA)
Arc Welding In General
(AREA)
Butt Welding And Welding Of Specific Article
(AREA)
Dispositif d'injection de fluides sous pression dans un échangeur thermique à plaques et procédé de nettoyage d'un tel dispositif d'injection
Procede de congelation d'une pluralite de tubes de conditionnement remplis chacun d'un volume predetermine de substance biologique et systeme pour la mise en œuvre d'un tel procede