Ring Rolled Forging

At Seglian, we manufacture V-band sealing joint rings, Marmon adaptor rings, and other rolled flanges for industries such as oil, gas, and chemicals. Using the ring rolled forging process, we create near net shape rings as one-piece forgings derived from large-diameter bar stock, ensuring precision, durability, and efficiency in every component.

Large ring rolled forgings.
Marmon adapters for heavy trucks.
Marmon adapter ring rolled forgings, precision machined.

Benefits of our ring rolled forging process

Lower Cost

Near Net Shape Reduced machining costs

Lower Gross Weight


Reduction and optimization of gross material weight used

Orders Sooner


Fast, highly efficient and reproducible forging process

Increased Quality

Improved material integrity and quality of the component

High and Low Quantity Parts


This process is suitable for any quantity of production part

Our Current Range of Machined Ring-Roll Forged Products

At Seglian, we manufacture medium-sized, machined ring-rolled forging products from stainless steel, carbon steel, and alloy steel, tailored to your application, requirements, and part geometry. Our offerings include V-band sealing joint rings for DPF and SCR systems, with diameters up to 400mm and variable cross-section geometries, as well as Marmon adaptor rings ranging from 75mm to 300mm in diameter with spherical or straight sealing faces. Additionally, we produce other rolled flanges for industries such as oil, gas, and chemicals, delivering precision-engineered solutions for diverse applications.