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Shanghai Toko Tech Co. Ltd. is a professional manufacturer and supplier of high-performance special alloy pipes and components. While renowned for its seamless products, TOKO TECH also provides ALLOY 600 (UNS N06600) welded coiled tubing, offering a cost-effective solution for high-temperature applications that require excellent oxidation resistance and mechanical strength, while benefiting from the economic advantages of the welding process and the installation convenience of long continuous lengths.
Hauptmerkmale und Vorteile.
Hervorragende Oxidationsbeständigkeit bei hohen Temperaturen. Maintains the core characteristic of ALLOY 600, forming a protective chromium oxide layer that provides outstanding resistance to oxidation at temperatures up to 1177°C (2150°F). This makes the welded coil ideal for continuous high-temperature service.
Beständigkeit gegen Aufkohlung und Sulfidierung.Zeigt eine gute Beständigkeit gegenüber Atmosphären, die aufkohlende und schwefelhaltige Verbindungen enthalten, wie sie in der Wärmebehandlung und in Industrieöfen häufig vorkommen.
Gute Korrosionsbeständigkeit.Bietet eine ausgezeichnete Korrosionsbeständigkeit gegenüber frischem und alkalischem Wasser sowie eine gute Beständigkeit gegenüber verschiedenen organischen und anorganischen Chemikalien. Es ist sehr widerstandsfähig gegen Chlorid-Ionen-Spannungskorrosionsrisse.
Cost-Effectiveness: Welded tubing typically has a lower production cost compared to seamless tubing, providing an economical alternative for projects where the extreme pressure ratings of seamless tubing are not required, but core high-temperature material properties and long lengths are essential.
Continuous Coiled Length: Supplied in long continuous coils, eliminating multiple connection points and simplifying installation in complex high-temperature systems such as furnace radiant tubes and heat treatment fixtures.
Manufacturing Process & Quality Focus:
The tubing is formed from precision-rolled ALLOY 600 strip (with controlled composition: Ni ≥72%, Cr 14-17%, Fe 6-10%, C ≤0.15%), which is then longitudinally welded using advanced Tungsten Inert Gas (TIG) or Laser WeldingVerfahren unter Schutzatmosphäre, um eine saubere, hochintegrierte Schweißnaht zu gewährleisten. Ein kritischer Schritt ist dieLösungsglühen Wärmebehandlung at 1038-1149°C (1900-2100°F) of the finished coil, followed by pickling & passivation. This process dissolves any carbides that may have formed during welding, restores the corrosion and oxidation resistance in the weld heat-affected zone (HAZ), and ensures a uniform, passive surface finish.
Typische Spezifikationen (anpassbar).
Materialqualität. UNS N06600 / EN 2.4816 / ASTM B167 / W. Nr. 2.4816 (Inconel 600)
Außendurchmesser (O.D.).φ6,0 mm ~ φ25,0 mm (Üblicher Bereich für geschweißte Spulen)
Wanddicke (W.T.). 0.5 mm ~ 2.5 mm (Varies with O.D.)
Länge der Spule.Mehrere hundert Meter pro Endlosspule.
Standard. ASTM B167 (Seamless) & ASTM B517 (Welded) for Nickel-Chromium-Iron Alloy Tubing
Primäre Anwendungen.
This welded coiled tubing is suitable for a variety of high-temperature applications where oxidation resistance is paramount, but maximum pressure capability is not the primary concern, including:
Wärmebehandlungsindustrie.Strahlrohre, Muffeln, Retorten und Korbvorrichtungen in Aufkohlungs-, Nitrier- und Glühöfen.
Chemische und petrochemische Verarbeitung. Equipment for handling caustic solutions and other corrosive chemicals at elevated temperatures.
Stromerzeugung. Low-pressure sections of superheater and reheater systems, and other high-temperature components in fossil fuel power plants.
Industrielle Heizung.Heizelementummantelungen, Schutzrohre und andere Hochtemperaturofenteile.
Automotive & Aerospace: Exhaust system components and various high-temperature sensor protections.
Why Choose TOKO TECH’s ALLOY 600 Welded Coiled Tubing?
TOKO TECH stellt die Qualität seiner geschweißten Produkte durch strenge Kontrollen sicher. Der Prozess umfasst100% weld seam inspection (via eddy current testing) to ensure integrity. The mandatory full coil solution annealing and pickling & passivation treatment is crucial for achieving the optimal microstructure and high-temperature performance. The coils are typically protected with VCI-Verpackung (Vapor Corrosion Inhibitor)um eine Oberflächenkontamination während des Transports und der Lagerung zu verhindern.
Zusammengefasst. TOKO TECH’s ALLOY 600 welded coiled tubing provides a cost-efficient and reliable solution for high-temperature applications requiring exceptional oxidation, carburization, and corrosion resistance. It combines the material benefits of ALLOY 600 with the economic and installation advantages of welded coiled tubing, making it a valuable choice for engineers in the heat treatment, chemical processing, and power generation industries for medium-pressure, high-temperature duties.