Energy & Power — Heavy Welded Components for the Electrical Industry
Certified fabrication of transformer housings, conservators, and process equipment for energy infrastructure producers. ISO 3834-2 and EN 1090-2 EXC4 certified. Components over 15 tonnes. Full material traceability. Since 1994.
One Partner for Heavy Welded Components — From Raw Material to Tested Assembly
Steiger manufactures heavy welded steel components for transformer manufacturers and energy equipment producers. Our integrated production approach — combining certified welding, CNC machining, and in-house process equipment testing — ensures that every component leaves our facility dimensionally verified, traceable, and ready for integration.
We serve clients in the electrical industry who require documented quality at every production phase, from certified material procurement through welding, dimensional verification, surface treatment, and delivery.
Certified to the Standards the Energy Sector Demands
Every component we produce for the energy and electrical sector is manufactured under a comprehensive quality management system. Welding procedures are qualified and traceable. Materials carry mill certificates. Dimensional verification is performed with advanced metrology equipment before shipment.
- EN 1090-2 EXC4 — Execution Class 4: for structural steel components
- ISO 3834-2 — Comprehensive Quality Requirements for Fusion Welding of Metallic Materials
- ISO 9001:2015 — Quality Management Systems
- ISO 14001:2015 — Environmental Management Systems
- ISO 45001:2023 — Occupational Health & Safety Management Systems
Personnel & Qualifications:
- 10 TÜV Rheinland-certified welders (ISO 9606-1)
- 2 International/European Welding Engineers (IWE/EWE)
- 2 International Welding Practitioners (IWP)
- 1 International Welding Technologist (IWT)
- 20+ documented Welding Procedure Qualification Records (WPQRs)
- Full material traceability to mill test certificates (MTCs)
Energy and Electrical Industry Applications
Electrical Industry
- Transformer housings and conservators over 15 tonnes
- Transformer tank parts and ancillary steel components
- Custom steel components for transformer manufacturers
Industrial Process Equipment
- Industrial coolant clarifiers and filters — fabrication and in-house test running
- Custom process equipment for energy-related manufacturing
Advanced Manufacturing for Heavy Energy Sector Components
5-axis CNC Gantry Milling
- Dimensions: 12,000 x 4,000 x 1,500 mm travel
- Applications: Large welded frames, transformer components, structural assemblies
- Key capability: Handles components up to 12 metres in length
3+2-axis CNC Horizontal Milling
- Dimensions: 12,000 x 1,250 x 3,500 mm travel
- Applications: Long structural components, process equipment frames
- Key capability: Extended reach for large welded assemblies
3-axis and 5-axis CNC Vertical Milling Centres
- Dimensions: Up to 3,000 x 1,000 x 1,500 mm
- Applications: Medium-sized components, fixtures, tooling
Turning Capabilities
- Traditional lathes: Ø350 x 1,500 mm
- Face lathe: Ø1,500 x 200 mm
- Applications: Cylindrical components, shaft machining
Additional Machining Operations
- Drilling, boring, tapping, sawing, chamfering
- Grinding for surface finish correction
- Maximum component weight: up to 25 tonnes
- Total: 10+ CNC machining centres and conventional machines
Welding Processes
- Gas Metal Arc Welding (GMAW/MIG-MAG)
- Gas Tungsten Arc Welding (GTAW/TIG)
- Submerged Arc Welding (SAW)
- Shielded Metal Arc Welding (SMAW/MMA)
Material Cutting
- CNC oxy-fuel plate cutting: 12,000 x 4,000 mm, thickness up to 120 mm
- CNC plasma plate cutting: 12,000 x 4,000 mm, thickness up to 40 mm
- NC Press Brake: up to 5,000 mm length, 400-tonne pressure
Surface Treatment
- Shot grit blasting (ISO 8501-1): cabin 14 m x 5.5 m x 5 m
- Industrial airless spray painting: heated paint shop, 540 m²
Capacity:
- Component size: up to 12 metres in length
- Component weight: up to 25 tonnes
- Production area: over 7,000 m² with 9 bridge cranes (35-tonne capacity)
Measurable Accuracy — Verified with Advanced Metrology
Dimensional Verification
- Leica Absolute Tracker AT403: Laser tracker with measurement volume from 0.8 m to 320 m in diameter
- Hexagon Romer Portable Measuring Arm: 2.5 m working diameter with integrated laser scanner and tactile probing
- Achievable accuracy: 0.05 mm positional accuracy over 10 metres on welded and machined structures
Non-Destructive Testing (NDT)
- Visual Examination (VT) — Level II, in-house
- Liquid Penetrant Testing (PT) — Level II, in-house
- Ultrasonic Testing (UT) — external partners
- Radiographic Testing (X-ray) — external partners
Material Traceability
- Mill certificates to EN 10204 3.1 or 3.2
- Material verification and documentation at each production stage
- Certified material suppliers
What this means:
We do not just manufacture components — we deliver verified, measured assemblies ready for integration. Every component is inspected and dimensionally verified before it leaves our facility. For energy sector clients, full documentation packages are available upon request.
Reference Projects in the Energy and Electrical Sector
Electrical Industry
Transformer housings — over 15 tonnes, Ganz Transformers Hungary
Transformer conservators — fabricated and delivered to transformer manufacturers
Transformer tank parts — custom welded steel components
Industrial Process Equipment
Industrial coolant clarifiers and filters — fabrication and test running in-house
Custom process equipment for energy-related manufacturing
How We Execute Energy
Sector Fabrication Projects
Step 1: Technical Review and Quotation
Submit your drawings (PDF, DWG, STEP) or specifications
Our engineers review for manufacturability and identify potential challenges
Detailed quote within 3–5 business days
Step 2: Design for Manufacturing (DFM)
Welding and machining sequence planning
Fixture and tooling design (if required)
Material specification and procurement planning
Quality control plan development
Step 3: Material Procurement
Certified material suppliers
Mill certificates and full traceability
Material verification and documentation
Step 4: Cutting, Forming, and Preparation
CNC plasma or oxy-fuel cutting
NC press brake bending and forming
Component preparation to drawing
Step 5: Assembly and Welding
Certified welders assigned per WPS
Welding process selected per material, thickness, and application
In-process dimensional verification
In-process NDT (VT, PT)
Step 6: Stress Relief (If Required)
Thermal stress relief for large welded assemblies requiring tight post-machining tolerances
Step 7: CNC Machining (If Required)
Transfer to appropriate CNC machining centre
Precision machining to specification
0.05 mm positional accuracy achievable over 10 metres
Step 8: Process Equipment Testing (If Required)
Fabrication and test running of industrial process equipment in-house
Functional verification before delivery
Step 9: Verification & Testing
Dimensional verification with Leica laser tracker and Hexagon Romer portable arm
NDT (UT, X-ray if specified)
Surface finish verification
Full documentation package with measurement reports
Step 10: Surface Treatment (If Required)
Shot grit blasting to specified standard (ISO 8501-1)
Industrial airless spray painting (heated paint shop, 540 m²)
Coating thickness and adhesion testing
Step 11: Packaging and Delivery
Secure packaging for transport
On-site installation support available
Technical support during commissioning
What Makes Our Energy Sector Manufacturing Different
Auditable Quality at Every Phase
Energy infrastructure demands documented quality throughout the production chain. We maintain full traceability from raw material to final inspection — every weld is linked to a certified welder and a qualified procedure, every component to a mill certificate.
ISO 3834-2 Comprehensive Welding Quality
ISO 3834-2 is a welding quality requirement for fusion welding. Our manufacturing operations are certified to this standard, ensuring systematic quality management and documented procedures for every energy sector project.
Integrated Fabrication and Testing
We fabricate and test process equipment in-house. Industrial coolant clarifiers and filters are assembled, tested, and verified at our facility before delivery — eliminating the need for additional testing contractors and reducing project coordination risk.
Scale for Heavy Components
Transformer housings and conservators are heavy, large-format components. Our facility handles components up to 25 tonnes and 12 metres in length, with 9 bridge cranes providing 35-tonne lifting capacity throughout the production hall.
Family-Owned Reliability Since 1994
Every component that leaves our production floor carries our name. We are not a high-volume job shop — we are a manufacturing partner that treats each project as if it were our own. Direct access to decision-makers, flexible problem-solving, and long-term partnership focus.
“Professional, Experienced, Trustworthy”
– MALCHEM ROMANIA
Frequently Asked Questions
We manufacture transformer housings, transformer conservators, and transformer tank parts. These are heavy welded steel components, typically over 15 tonnes, produced with full material traceability and certified welding procedures.
Yes. We fabricate and carry out test running of industrial process equipment — including industrial coolant clarifiers and filters — at our facility before delivery.
We handle welded components up to 12 metres in length and 25 tonnes in weight. Our facility has 9 bridge cranes providing a 35-tonne lifting capacity and a 5-axis CNC gantry with a working envelope of 12,000 x 4,000 x 1,500 mm.
Our operations are certified to ISO 3834-2 (Comprehensive Quality Requirements for Fusion Welding), EN 1090-2 EXC4 (Execution Class 4), and ISO 9001:2015. All welding is performed by TÜV Rheinland-certified welders under qualified welding procedures (WPQRs).
Yes. We provide full material traceability with mill test certificates to EN 10204 3.1 or 3.2, as required by the application.
Both. Our engineering team works from STEP, IGES, and other 3D formats, as well as traditional 2D drawings (PDF, DWG). We provide Design for Manufacturing feedback in both cases.
We provide shot grit blasting to ISO 8501-1 standards (cabin: 14 m x 5.5 m x 5 m) and industrial airless spray painting in a heated paint shop of 540 m². Coating thickness and adhesion testing are available.
Lead times depend on project complexity, material availability, and current production schedules. Please contact us with your specifications and timeline for a realistic assessment.
Ready to Discuss Your Energy Sector Project?
Tell us your component type, specifications, and timeline. Our engineers will review your requirements and respond with a detailed technical quote.