Heavy Steel Frame Fabrication, Welded Metal Assemblies & Heavy Weldments
Custom heavy steel frame fabrication, welded metal assembly manufacturing, and large-scale heavy weldments for industrial applications. ISO/ASME/AWS certified quality. Global delivery and fast lead times.
What We Build
- Custom steel frames (heavy-duty)
- Welded metal assemblies (large)
- Heavy weldments & steel structures
- Precision machined & welded components
Engineered to spec • Tight tolerances • Traceable materials • NDT & dimensional inspection
Large-Scale Metal Fabrication Capabilities
End-to-end manufacturing for heavy steel frames, metal assemblies, and heavy weldments.
Heavy Steel Frame Fabrication
Custom steel frame fabrication and industrial frame welding for high-load and high-cycle applications.
- Oversized & heavy-duty frames
- Multi-process welding (MIG/TIG/FCAW/SAW)
- Precision fixturing and stress control
Welded Metal Assemblies
Large metal assembly fabrication with integrated machining for tight-fit interfaces and alignment.
- Complex sub-assemblies & modules
- Turnkey build-to-print
- Documentation & serialization
Heavy Weldment Manufacturing
Production of heavy weldments and welded steel structures with full QA and NDT.
- Thick-section welding & groove welds
- Post-weld heat treatment as required
- Coating, blasting, assembly & testing
Equipment & Capacity
At Openex, we combine advanced equipment with extensive capacity to handle the most demanding heavy steel frame and weldment projects. Our purpose-built facilities and skilled workforce enable us to produce large-scale components with exceptional precision and efficiency.
Multi-axis and large-format milling and turning for precise machining of oversized components.
Certified MIG, TIG, and flux-cored welding for carbon steel, stainless steel, and specialty alloys.
High-capacity plasma cutting, oxy-fuel cutting, and beveling systems for thick plates.
Heavy plate rolling and press brakes for forming large sections and custom profiles.
Multiple cranes with lifting capacities up to 250 tons, ensuring safe handling of oversized assemblies.
Industrial-grade surface preparation and coating facilities to meet corrosion and durability standards.
Spacious bays with up to 55 ft (16.8 m) under-hook height for complex structural assemblies.
For efficient handling, rotation, and positioning of large welded assemblies during fabrication and welding.
UT, RT, MT, PT, dimensional & laser inspection capabilities.
Industries & Applications
Serving demanding industrial sectors where strength, precision, and reliability are critical. We do not serve residential or general construction markets — our focus is on heavy-duty, engineered solutions.
Heavy steel frames, machine bases, and wear-resistant housings for crushers, mills, and material-handling systems.
Welded deck modules, support structures, and offshore platform components built for extreme environments.
Turbine frames, generator housings, and support weldments for hydro, wind, and thermal power plants.
Skids, process equipment frames, and heavy welded structures for upstream, midstream, and downstream operations.
Chassis, machine beds, precision frames, and mechanical assemblies for large-scale manufacturing systems.
High-accuracy welded assemblies, ground-support structures, and heavy-duty equipment frames.
Certified Quality for Heavy Steel Fabrication
We maintain rigorous quality standards for heavy steel frame manufacturing, industrial metal assemblies, and large weldment manufacturing.
- ISO 9001, ISO 14001, ISO 45001
- AWS, ASME, API procedures & certified welders
- EN 1090, ABS, DNV (project dependent)
- WPS/PQR, full traceability, material certificates
Project Gallery
FAQ: Heavy Frames, Assemblies & Weldments
What information do you need for a quote?
Drawings (STEP/DWG/PDF), material spec, quantity, critical tolerances, weld standards, inspection requirements, and delivery timeline.
Do you provide machining for welded assemblies?
Yes. We integrate CNC machining (milling, turning, boring) to achieve precision fits on heavy welded structures and assemblies.
Do you serve my region?
We ship globally and regularly serve clients in Europe, North America, and other industrial regions.
Get a Fast Quote
Tell us about your heavy steel frame, metal assembly, or heavy weldment project.