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

Tank Head Fabrication and Manufacture

Openex has the capabilities of forming ASME & Non-code tank/vessel heads, Segmental heads, Spheres and formed elbows.

At Openex, one of the many areas we specialize in is the fabrication of conventional tank heads and segmental tank heads(multi piece or segments). 
We cater to a wide variety of industries including oil & gas, water treatment, pulp & paper, cryogenics, propane, transportation and more, providing a wide variety of solutions including components for pressure vessels, tanks, and boilers.
Our Quality Control program also ensures these meet all manufactured standards including ASME and DNV-GL.
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tank head heat treatment

We fabricate, trial fit, tack weld, match, mark and knock-down our tank heads with robotically trimmed, tapered or beveled edges.
Whether from normalized or as-rolled plates, our segmental tank head types range from Semi Elliptical, Flanged and Dished, Tori-conical, Double Knuckle Cone, Toroidal, Hemispherical and Dished Only.Our fabrication of Segmental, multi piece, tank heads go back 60 years, and our experience and precision allow us to produce the highest quality segmental heads ready for fit up, with no need for additional work.

Our in-house robotic trimming allows for faster production while maintaining a high level of accuracy. We have two technologically advanced robotic rooms to take care of precision trimming and beveling.

In some cases of thin or extremely thick Hemi’s or multi curvature structures a segmental is your only solution. Ask for examples of some of our more difficult projects.
Our commitment to innovation and continuous improvement, allows us to stay ahead of industry demands and provide the quality and precision that our clients have come to expect.

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

Tank Head Fabrication Capabilities
GeneralSegmental Heads 
Large Diameter Heads 
ProcessCold FormedMatch Mark
Hot FormedKnocked-Down
Trial Fitted 
Head TypeFlanged & DishedDouble Knuckle
ASME 2:1 Semi EllipticalToriconical
HemisphericalDished & Flue
Dished Only 
Edge PreppedTrimmed 
Diameterup to 24 m 
Thickness8mm to 210mm 
MaterialCarbon SteelChrome-Moly SA387
Stainless SteelDuplex stainless
Stainless-CladHigh Yield (HY80/HY100)
Pressure Vessel Grade SA516-70 
NormalizedQuenched and Tempered
Normalized and Tempered 
Stress Relieving and Blasting

Post Weld Heat Treatment

(35 m x 11 m x 12.5m)

Testing & InspectionUltrasonic ThicknessCharpy V-Notch Tests
Ultrasonic SoundnessBrinell Hardness
Magnetic ParticlePositive Material Identification (PMI)
Liquid Penetrant 
Additional ServicesBlasting (29m x 5.5m x 6m) 
Priming Weldments 


  • segment tank head
    5m 14mm tank head
    5.5 diameter 8mm thickness nickel base alloy tank head
  • 6m 16mm tank head
    large diameter tank head
    tank head lifting
  • 8m diameter 32mm thick tank head
    10m diameter 18mm duplex tank head
    tank head manufacturing

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.

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

Certifications: ISO 9001, 14001,18001, CE EN 1090-1, ISO 3834, ABS, AWS, API, ASME, DNV.GL.

Industries Served: MiningConstructionOil & GasPower GenerationMarineAutomotiveRenewable EnergyPulp & PaperBridgeAerospaceDefense,  Printing and Dyeing,  Machinery, etc.

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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