Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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
B21C37/08—Making tubes with welded or soldered seams
Landscapes
Engineering & Computer Science
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Mechanical Engineering
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Butt Welding And Welding Of Specific Article
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Vorrichtung zum Wellen und Vorschieben einer blanken Drahtelektrode für das Lichtbogen-Verbindungsschweißen von Metallen mit schmaler, tiefer Schweißfuge
Einrichtung zur Herstellung schmiedeeiserner Rohre aus in Rohrform gebogenen Blechstreifen durch in Laengsrichtung der Rohrnaht fortschreitende elektrische Abschmelzschweissung
Verfahren zur Herstellung eines gerippten Rohres fuer Waermeaustauscher und Vorrichtung fuer die Herstellung eines nach diesem Verfahren gebildeten gerippten Rohres