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Industry Leading Custom Metal Fabrication
180 ACRES • 250-TON LIFTING CAPACITY

Industry Leading Custom Metal Fabrication

Openex Metal Fabrication is a full-service industrial contract manufacturer specializing in heavy metal fabrication, large-scale CNC machining, precision medium-part machining, welding, forming, assembly and dimensional inspection for oversized and complex components.

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Heavy CNC Machining Services
PRECISION AT MASSIVE SCALE

Heavy CNC Machining Services

State-of-the-art 5-axis CNC machining for large gearboxes, tube sheets, and machine beds.

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World-Class Quality & Testing
ISO, CE, ASME, AWS CERTIFIED

World-Class Quality & Testing

In-house dimensional inspection and Non-Destructive Testing (NDT) to meet global standards.

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Custom Industrial Manufacturing

Metal Fabrication and CNC Machining for Industrial Parts and Heavy Structures

From single machined parts to large welded assemblies, we work from your drawings and put the right processes behind the job.

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About Openex

Fabrication, Machining, and Assembly in One Place

Openex builds custom metal components, large welded structures, and fabricated assemblies for industrial customers. We combine fabrication and CNC machining, along with cutting, welding, finishing, assembly, and inspection as the job requires.

The plant covers roughly 180 acres and runs 55 cranes with capacities from 3 to 250 metric tons. That scale helps with large, heavy work — though every job still needs a proper look at size, weight, and logistics.

When more than one process is involved, keeping it under one roof usually means fewer handoffs and a clearer picture of scope, quality, and delivery for the people buying the work.

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180

Acres

Manufacturing Site

Approximate total site area for industrial production.

55

Cranes

Lifting Equipment

Capacities from 3 to 250 metric tons.

250

Metric Tons

Max Crane Capacity

Actual lifts depend on load, location, and setup.

One Shop

Multiple Processes

Coordinated Work

Fabrication, machining, finishing, assembly, and inspection as needed.

Manufacturing Capabilities

What We Do

These are the main processes we use for custom industrial parts and heavy structures. Exact scope is always confirmed against the drawings.

Custom Metal Fabrication

Steel components, large welded structures, and industrial assemblies. We handle cutting, forming, fit-up, welding, machining, and finishing as needed.

  • Large welded structures
  • Custom steel components
  • Fabricated assemblies
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Large CNC Machining

CNC work for large and heavy parts — milling, boring, turning, and precision machining of weldments, castings, and other workpieces.

  • Large-part milling
  • Boring and turning
  • Machined weldments
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Welding Services

Structural and heavy welding for industrial equipment. Procedures and inspection requirements follow the project specification.

  • Structural welding
  • Heavy weldments
  • Weld inspection
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Forming and Cutting

Plate preparation, cutting, profiling, and forming for custom parts and assemblies.

  • Plate preparation
  • Cutting and profiling
  • Formed components
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Assembly and Integration

We can combine fabrication, machining, and assembly under one roof when the job calls for it — fewer handoffs, clearer responsibility.

  • Mechanical assembly
  • Component integration
  • Project coordination
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Inspection and NDT

Dimensional checks, non-destructive testing, and quality documentation based on the drawings and agreed acceptance criteria.

  • Dimensional inspection
  • Non-destructive testing
  • Quality records
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How a Job Typically Runs

From Drawings to Finished Parts

Most projects follow a similar path. Not every step applies to every job — we match the sequence to the design, quantity, and inspection plan.

01

Review the drawings

Check geometry, material, tolerances, quantity, and standards.

02

Prepare material

Source, cut, and prepare plate or sections as needed.

03

Fabricate and machine

Forming, welding, machining, and related operations.

04

Inspect and finish

Dimensional checks, testing, and surface treatment.

05

Assemble and ship

Final assembly if required, then pack and deliver.

Materials

Materials We Work With

Material choice depends on the application. We review the specified grade as part of the RFQ.

Example Components

Parts We’ve Built

A few examples of the kind of work that comes through the shop. Each page has more detail on the application and manufacturing requirements.

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Industries

Where the Work Goes

We support industries that need custom-fabricated structures, heavy equipment parts, and machined components. Fit is always judged against the engineering and quality requirements of the job.

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Quality and Inspection

Quality Starts with the Drawings

We plan inspection around the drawings, material specs, critical dimensions, and any codes that apply. Those requirements should be clear before production starts so the right checks can be built into the process.

Depending on the job, that may mean dimensional verification, visual inspection, and non-destructive testing. Methods, hold points, and records are confirmed for each order.

Inspection Capabilities Certifications

What We Usually Confirm Before Production

  • Latest approved drawings and revisions
  • Material grade and traceability needs
  • Critical dimensions and tolerances
  • Welding procedures and fabrication standards
  • NDT methods and acceptance criteria
  • Dimensional inspection and documentation
  • Surface treatment or coating requirements
  • Packing and delivery requirements

Customer Feedback

What Customers Have Said

“The rotary kiln is a key part of the process flow sheet at Araguaia. The 11 individual sections of the kiln will now be welded together over the course of the next month, before the sections are lifted into place on top of the kiln piers for final welding and alignment.”

Mr. Walter | CFO, FLD

“Under the condition of high technical requirements, difficult production and tight delivery time, Openex Metal Fab completed the processing of products on time and with high quality, which ensured the construction progress of our oil project.”

Mr. Daniel | Engineer, OKT

Customers

Companies We’ve Worked With

Trusted by Global Equipment Manufacturers & EPC Contractors.

Valmet Mitsubishi Metso JFE Voith Andritz ABB CSIC Honeywell Hyosung Outotec Terex
See Manufacturing Case Studies

FAQ

Common Questions

Quick answers for engineering and procurement teams looking at a manufacturing partner.

What custom metal fabrication services does Openex provide?
We fabricate industrial components, welded structures, and assemblies. Depending on the job, that can include cutting, forming, welding, machining, finishing, assembly, and inspection.
Do you handle both fabrication and CNC machining?
Yes. When the design allows, we can run fabrication and CNC machining in the same shop. That usually means fewer suppliers and simpler coordination on dimensions and schedule.
Can Openex manufacture large and heavy components?
Our site is about 180 acres with 55 cranes, from 3 to 250 metric tons capacity. Whether we can take a specific part depends on size, weight, material, and how it needs to be handled and shipped.
What materials do you work with?
Carbon steel, stainless, alloy steel, aluminum, heat-resistant steel, duplex, and super duplex. Grade and suitability are confirmed against each project specification.
Can you work from our drawings and 3D models?
Yes. Send 2D drawings, 3D models, or even preliminary sketches. Include material, critical dimensions, tolerances, quantity, and any inspection requirements you already know.
What kind of inspection can you arrange?
We review inspection needs during quotation. Typical scope includes dimensional checks, visual inspection, and NDT when required. Methods and acceptance criteria should be agreed before production starts.
What should I include in an RFQ?
Drawings or models, material grade, quantity, overall size, approximate weight, critical tolerances, standards, inspection/NDT needs, surface treatment, delivery location, and required date. If some of that is still open, send what you have and we can start from there.
Can one supplier handle manufacturing and assembly?
Often yes. When the scope fits, we can coordinate fabrication, machining, finishing, inspection, and assembly. The quote should spell out exactly what is included and what the customer supplies.

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Have a Part or Assembly to Make?

Send the drawings, models, or whatever project details you have. We’ll review the scope and what we need to quote.

01 Share drawings, models, or available documents.

02 Include material, quantity, size, and quality requirements if you know them.

03 We’ll discuss feasibility, scope, and what the quote needs to cover.

What Helps Us Quote Faster

You don’t need every detail locked in. Send what you have.

  • Drawings: 2D, 3D, or sketches
  • Material: Grade and any special requirements
  • Quantity: Prototype, batch, or production
  • Size: Overall dimensions, approximate weight, critical tolerances
  • Quality: Standards, inspection, NDT, documentation
  • Delivery: Date and destination
Email Your RFQ Call Sales

Email: sales3@openex.com.cn

Phone: +86-186-5928-0806

Large CAD packages? Email us and we’ll arrange a suitable way to transfer the files.