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

Flanges Manufacturing

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.

Our extensive heavy-duty manufacturing capability combined with a large inventory of plate stock allows us to meet the most complex and challenging quality and delivery requirements.

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large Diameter flange manufacturing
flange manufacturing

Flanges Manufacturing Process

Material →Cutting
Drilling&MillingBlank Turning

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.
large flanges cmm inspection

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 of Flange Manufacture:

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

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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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