Transition Sections
Seamless Transition Sections
We produce transition sections using the advanced “forging-and-rolling” process (free forging + radial-axial rolling), and we are among the very few manufacturers worldwide with this capability.
For large-diameter pressure vessels, coke drums, and similar equipment, traditional transition sections are usually made by multi-segment welding. At Iraeta, our integrally formed forging-and-rolling process creates a seamless transition section that performs far better under temperature cycling, vibration, and high-pressure conditions compared with welded structures.
Easily Achieve Larger Diameters
While seamless, one-piece transitions can also be made by large forging presses, their diameter is usually limited to about 7 meters due to the press columns.
Using the “forging-and-rolling” process (open-die forging + radial-axial rolling), Iraeta can easily produce transition sections up to the 10-meter range.
Moreover, radial-axial rolling is a continuous forming process. Under high rolling force, the metal flow aligns with the circumference, which significantly improves performance and reduces fatigue cracking.
In-House Steel Mill, One-Stop Solution
We operate our own short-process steel plant and use LF / VD / VOD systems to refine material composition. For critical applications, we can also produce high-purity steel through ESR (Electroslag Remelting). Compared with suppliers without melting capability, our advantages include:
1.Easier material customization: We work with you to fine-tune alloy composition and steel cleanliness for your specific needs. You no longer need to source a separate steel mill or coordinate raw-material schedules.
2.More accurate quality traceability: With a full data chain from melting to forging, heat treatment, and machining, any issue can be traced precisely to the specific heat. This is especially important for first-of-its-kind products and long-cycle, multi-batch projects.
Performance Showcases
Project: Saudi Aramco Jafurah
Type: Y - type Transition Piece
Quantity: 2 pieces
Diameter: 8.6 meters
Project: a large oil refinery in Europe
Diameter: 4.5 meters
Height: 2.5 meters
Project: a large - scale refining - chemical project in China
Type: Transition Piece of Isomerization Reactor
Diameter: 10.1 meters
Business Inquiry
China projects：0531-83800687
Overseas projects：0531-83802699
Or email us at ebiz@iraeta.com
Where Big Ideas Get Forged
We operate a world-class forging cluster, featuring exclusive mills that set us apart in the industry. These industrial powerhouses break through traditional manufacturing limits, empowering engineers to unleash their creativity and bring groundbreaking designs to life.
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Green Steel
Most of our raw materials are sourced from our own short-process steel mills, where leftovers from production are recycled. This green cycle plays a crucial role in significantly reducing carbon emissions in our products.
What's Green Steel
