Large-Scale Custom Flange Machining
Large-scale industrial applications—such as wind turbine towers, heavy-duty pipelines, and massive pressure vessels—rely on custom flanges to maintain absolute structural integrity and leak-proof seals under extreme pressures.
At Openex, we possess the massive Vertical Turning Lathes (VTLs) and heavy multi-axis CNC drilling centers required to machine enormous custom flanges and forged rings. Whether you need standard large-diameter weld neck flanges or highly complex, non-standard slewing ring bearings, we have the capacity to machine parts up to 8 meters (26+ feet) in diameter with exceptional precision.
Large Flange Manufacturing Specifications
We do not stock off-the-shelf pipe flanges; we contract manufacture massive, custom-engineered flanges to your exact blueprints. Below are our general facility capacities:
| Maximum Diameter | Up to 8,000 mm (8 Meters) |
|---|---|
| Flange Types | Wind Tower Flanges, Weld Neck, Blind, Slip-On, Slewing Rings, Custom Forged Rings. |
| Materials Processed | Carbon Steel (Q345/S355), Stainless Steel (304/316), Duplex, Alloy Steels, and Titanium. |
| Machining Tolerances | Strict face flatness and highly precise bolt-hole positional tolerances via CNC. |
| Quality & Inspection | CMM Dimensional Inspection, Ultrasonic Testing (UT), Magnetic Particle Testing (MT). |
Our Work: Large Flanges
The Manufacturing Process
Depending on the design, flanges can be machined from massive seamless forged rings, or we can custom roll heavy steel plates into rings and perform full-penetration submerged arc welding (SAW) to close the loop.
The ring is mounted on one of our massive VTLs. We machine the inner diameter (ID), outer diameter (OD), and face to achieve the necessary surface finish and absolute flatness required for high-pressure mating.
Using gantry mills and specialized drilling centers, we accurately drill and tap the bolt-hole circles. Positional accuracy is critical here to ensure perfect alignment during field assembly.