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

Heavy Duty CNC Machining for Large Diameter Flange Manufacturing

CNC Machining for Stainless Steel Large Flange

Stainless Steel

Grinding, Polishing

Machine Tools:
Cutting Machine, Lathe, Drilling Tools

As Required

Dimensions Measuring:
Coordinate Measuring Machine (CMM)

large Diameter flange manufacturing

Large diameter flanges can be manufactured out of any steel material grade. They come in flange faces that include:

RTJ (Ring Type Joint)
RF (Raised Face)
FF (Flat Face)

Some of the most common applications for the large diameter flanges are for subsea / onshore pipelines and ASME pressure vessels.

large diameter flange manufacturing large diameter flange

Custom made large diameter flanges can come as large as the customer requires and made to their design specs. 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. 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.

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.

Send us your drawing, and we will reply with a quote. We offer same day shipment for stock items and provide rush and emergency services when time is a factor or service is interrupted. For more detailed information about our standard and custom flange products, contact us at now.


Flange Manufacturing Capabilities
General Capabilities Flange Marking Thermal Stress Relieving
CNC Drilling Taping
CNC Machining Coating
Conventional Machining Non-Destructive Testing
Counter Boring Robotic Welding
Counter Sinking Automatic Welding Positioners
Materials Carbon Steel A572-50
A105 Forging A588
A516-70 Stainless Steel (304/304L & 316/316L)
Finishing Services Available Painting Marking
Coating Stamping
Tolerance (+/-) Industry Standard Tighter Tolerance*
Inspection Services Laser Tracker Inspection
Non-Destructive Testing
*Traditional Dimensional Measurement Equipment
Additional Information
Industry Focus Water Works Heavy Industry
Wind Tower Machine Tool
Utilities Marine
Aerospace Military
Agricultural Mining
Architectural Oil Field
Auto/Truck/Transportation Steel Mill
Chemical Packaging/Converting
Construction Power Generation


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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