Welding fabrication, vessel construction, nozzle and apparatus engineering in steel and stainless steel.
Schweißtechnik Anneliese Krüger
Hückelhoven, GermanyNew on Amplifa
About Us
Schweißtechnik Krüger is a medium-sized family business founded in 1975, located in Hückelhoven on the former Sophia-Jacoba colliery site. As a service provider in steel and stainless steel processing, the company manufactures highly specialized products: vessels (round, double-walled, with heat exchanger, water separator), fan technology components such as intake nozzles, impeller and cover discs as well as cones, laser cuttings, apparatuses and heat exchangers, pipework, and environmental technology systems such as burners, combustion chambers and systems for mine gas combustion. The core competence is welding using the TIG, MIG, MAG and manual electrode welding processes. Materials processed include structural steels, fine-grain and duplex steels, heat-resistant steels, nickel and cobalt alloys, and special materials. Production is carried out as one-off production and small series; nozzles are completely manufactured up to Ø 2,500 mm and 1,000 mm height. The company's products are used in systems by customers from the steel, oil, gas and chemical industries worldwide, among others.
- Site
- Hückelhoven
- Processes
- TIG welding, MIG welding, MAG welding, Manual electrode welding, Laser cuttings, Vessel construction (round vessels, special shapes, double-walled, with heat exchanger, water, Fan technology (intake nozzles, impeller and cover discs, cones), Nozzle construction (one-off production, small series, nozzles with flanges, cover discs)
- Materials
- General structural steels, Fine-grain structural steels, Duplex steels, Tool steels, High-speed steels, Wear-resistant steels, High-grade structural steels, Nitriding steels
- Certificates
- Dye penetrant testing (carried out in-house)
- Founded
- 1975
- Industries
- Mechanical engineering, Mining, HVAC technology, Fan manufacturing, Combustion technology, Steel industry
- 01
Laser cutting
- 02
Forming/Fabrication
- 03
Welding (TIG, MIG, MAG, electrode)
- 04
Assembly/Testing (dye penetrant testing)
Materials & Processes
Welding processes
TIG, MIG, MAG and manual electrode welding for steel, stainless steel, duplex and special materials.
General structural steels
Base material for vessel construction, nozzles (max. 8 mm) and steel construction.
High-strength weldable steel
Higher-strength structural steel for nozzle components up to max. 8 mm wall thickness.
Wear-resistant steel
Wear-resistant steel for nozzle components up to max. 5 mm wall thickness.
Heat-resistant steel
For heat-stressed components such as combustion chambers and central tubes.
Duplex steels
Stainless steels for corrosion- and wear-stressed system components.
Nickel-based alloys
Special materials for thermally and chemically highly stressed components.
Cobalt alloys
Special alloys for wear-resistant and heat-resistant applications.
Bronze alloys
Special materials according to customer requirements.
Laser cutting
Cuttings from mild steel and stainless steel as a preliminary stage of production.
Locations
Hückelhoven
DEHeadquarters, Production
- Part weight / size
- Nozzles up to Ø 2,500 mm, height up to 1,000 mm
- Lot size
- One-off production, small series
- Materials
- Steel, stainless steel, duplex, special materials
- Laser cutting
- TIG/MIG/MAG welding technology
- Machine fleet (over 800 m² production area)
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| TIG weldingJoining | – | – | – | – | Steel, Stainless steel, Duplex steels, Nickel-based alloys, Cobalt alloys, Bronze alloys |
| MIG weldingJoining | – | – | – | – | Steel, Stainless steel, Duplex steels, Nickel-based alloys, Cobalt alloys, Bronze alloys |
| MAG weldingJoining | – | – | – | – | Steel, Stainless steel, Duplex steels, Nickel-based alloys, Cobalt alloys, Bronze alloys |
| Manual electrode weldingJoining | – | – | – | – | Steel, Stainless steel, Duplex steels, Nickel-based alloys, Cobalt alloys, Bronze alloys |
| Laser cuttingsMachining | – | – | – | – | Mild steel, Stainless steel |
| Vessel construction (round vessels, special shapes, double-walled, with heat exchanger, waterJoining | – | – | – | – | Stainless steel, Mild steel |
| Fan technology (intake nozzles, impeller and cover discs, cones)Joining | – | – | – | – | Steel, Stainless steel |
| Nozzle construction (one-off production, small series, nozzles with flanges, cover discs)Joining | – | Ø 2,500 mm × 1,000 mm | – | – | Naxtra 700 (max. t = 5 mm), S355J2 (max. t = 8 mm), S235JR (max. t = 8 mm) |
| Apparatus engineering (prototypes, one-off production, heat exchangers)Joining | – | – | – | – | Steel, Stainless steel |
| Pipework construction (modifications and repairs)Joining | – | – | – | – | Stainless steel, Mild steel |
| Environmental technology (burners, combustion chambers, injector burners, mine gas combustionJoining | – | – | – | – | Heat-resistant steels, Stainless steel |
| Dye penetrant testingTesting | – | – | – | – | – |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Machine fleet (no details given) | – | – | – | – | Hückelhoven (production area over 800 m²) |
Additional services
Reference customers
Quality
Dye penetrant tests on welded joints can be carried out. Production is performed as complete fabrication including testing according to customer requirements.
| Evidence | Hückelhoven |
|---|---|
| Dye penetrant testing (carried out in-house) |
History
- 1975
Founding of Schweißtechnik Krüger, based in Hückelhoven on the former Sophia-Jacoba colliery site.