No. 99 Yilan Rd., Xiamen , CN.
+86 186 5928 0806

Wind Power Flanges

Wind turbine flanges are ring-shaped connectors that are used to assemble the bodies of the steel towers supporting the wind turbines. Tower flange is an important wind power component for tower connection which is installed with six or seven flanges in a wind turbine. Tower Flange consists of three parts: Bottom Flange, Middle Flange, Top Flange.

Openex is a global manufacturer of various flanges. Upon request, we manufacture the forging of flanges and blinds that are custom-designed to customer dimensional requirements. We have an extensive track record of producing flanges from a wide variety of material grades. Our extensive raw material inventory allows us to manufacture forged flanges to the most challenging customer-specified product chemistry requirements.
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large flanges for wind turbine
large flanges cmm inspection

Flange Quality Assurance

As an ISO compliant manufacturing company, we perform both in-process and final inspections to ensure flange quality. In addition to traditional dimensional measurement equipment, we use high-end laser devices to verify tolerances. We offer non-destructive testing (NDT) on flanges for the most stringent applications to confirm they are defect-free. We provide material traceability and inspection reports to document that our products meet the highest standards of excellence.

We leverage numerous fabrication methods, including plate burning, CNC and conventional machining, automated flange drilling, robotic welding with automatic positioning, and many other state-of-the-art technologies to produce flanges with precise tolerances and fine surface finishes. Our expertise spans all flange types, including blind and reducing flanges, spectacle and paddle blinds, O-rings and Victaulic rings, adapter rings, and many other custom flanges. We can provide thermal stress relief, die-stamp/etching identification markings, and apply protective coatings, all in-house.

General Capabilities:

Flange Types :

  • Custom/Special Flanges
  • Precision Flanges
  • Tube Sheets
  • Blind Flanges
  • "Special" Thickness & Diameters
  • Reducing Flanges
  • Lightweight Flanges
  • Spectacle Blinds / Paddle Blinds
  • Mechanical Joint / MJ Bell
  • Slip on Flange
  • Rings
  • Back-up Flanges
  • Pressure Vessel Flanges
  • Tower Flanges
  • Wind Tower Flanges
  • Industrial Adapter Flanges


  • Carbon Steel
  • A105 Forging
  • A36
  • A516-70A572-50
  • A588
  • HSLA
  • Stainless Steel 
  • Titanium
  • Others

General Processing:

  • Flange Marking
  • CNC Drilling
  • CNC Machining
  • Conventional Machining
  • Counter Boring
  • Counter Sinking
  • Thermal Stress Relieving
  • Taping
  • Coating
  • Non-Destructive Testing
  • Robotic Welding
  • Automatic Welding Positioners


Up to 10 meters OD

Contact us at or call us at +86 186 5928 0806 for more information about manufacturing for flanges and to receive a free project quote today.

Our Full-Service Metal Fabrication - metal cutting and sheering, metal forming, bending, and rollingweldingCNC machining, sheet metal assembly, and quality inspection

Machining Services: Multi-Axis Machining, 5-Axis Machining, CNC Milling | Vertical and Horizontal, CNC Turning | Vertical and Horizontal, CNC Engineering, CMM Inspection

Material Types: castings, forgings, fabricated weldments, billets, bar stock, and plate

Metal Materials we worked: Stainless steel, Carbon Steel, aluminum, brass, bronze, chromium, copper, Monel, nickel,  titanium, zinc, and many other superalloys.

Other Industries Served: Aerospace, Construction, Energy, Food Processing, Heavy Equipment, Marine, Material Handling, Medical, Military, Mining, Offshore, Oil and Gas, Pharmaceutical, Power, Rocket, Space, Transportation, and Truck

About Openex

Openex is home to a full-service, one-stop-shop, contract manufacturing company producing custom large machined parts and fabrications. Our full large fabrication services including large machining, cutting, welding, rolling, punching, braking, testing, painting, and others.
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