Certified structural steelwork from Kaarst: welded assemblies, steel constructions and sheet metal working for mechanical and plant engineering
Wankum Schweißerei & Stahlbau GmbH
Kaarst (Büttgen), Gutenbergstraße 24 · DENew on Amplifa
Family-run certified welding company since 1970
Wankum Schweißerei & Stahlbau GmbH is a family-run manufacturing business in Kaarst-Büttgen that has been carrying out welding work, steel construction and metal processing for commercial and industrial customers since 1970. The company produces welded assemblies, machine frames, steel constructions for plant and recycling technology, piping assemblies and manifolds, vessels and silo systems in stainless steel, as well as one-off parts and bent parts. Workshop manufacturing includes oxy-fuel and plasma cutting (2,000 × 4,000 mm, oxy-fuel up to 100 mm), sheet cutting, bending, sawing, punching, drilling, plate rolling and MAG and TIG welding on steel, stainless steel and aluminium; galvanizing and powder coating are offered via partners. Materials include S235, S355, 1.4301, 1.4404, aluminium and Hardox wear-resistant steel. Since 2023 the company has been certified to DIN EN 1090-2 (EXC2) by TÜV Rheinland and is entitled to CE-mark load-bearing steel components. Customers come from mechanical and plant engineering, recycling, energy and water management, lifting technology and the food industry; material is procured with 3.1 inspection certificates.
- Site
- Kaarst
- Processes
- Welding shop (MAG, process 135), MAG welding certified to DIN EN 1090-2 EXC2 (process 135, material groups 1.1 and 1.2 per, TIG welding, Oxy-fuel flame cutting, Plasma flame cutting, Sheet cutting (sheet shear), Bending (press brake 200 t), Sawing (band saw and circular saw, straight and mitre cuts)
- Materials
- Steel S235, Steel S355, Stainless steel V2A, Stainless steel V4A, Aluminium, Hardox wear-resistant steel, Material group 1.1 per EN ISO 15608, Material group 1.2 per EN ISO 15608
- Certificates
- DIN EN 1090-2, execution class EXC2 (welding certificate), EN 1090-1 FPC certificate (factory production control, System 2+), EN 1090-2 (EXC2), EN 1090-1 FPC (System 2+), ISO 9001
- Founded
- 1970
- Industries
- Mechanical and special-purpose machinery engineering, Plant engineering, Recycling/waste management, Energy supply and water management, Chemical and process industry, Food industry
- 01
Consulting and CAD drawings / drawing review
- 02
Material procurement with 3.1 certificates
- 03
Cutting (flame cutting, shearing, sawing, punching)
- 04
Forming (bending, rolling)
- 05
Welding (MAG/TIG)
- 06
Surface finishing (galvanizing, powder coating)
- 07
Inspection and delivery of inspected components
Materials and processes
Steel S235
Structural steel for steel assemblies, blanks and bending work up to 12 mm on the sheet shear.
Steel S355
Higher-strength structural steel for load-bearing constructions and piping.
Stainless steel V2A
Corrosion-resistant stainless steel for piping, vessels and systems in the food and chemical industries.
Stainless steel V4A
Acid-resistant stainless steel for applications with chloride-containing media in piping.
Aluminium
Processing in MAG/TIG welding as well as plasma and saw cutting.
Hardox wear-resistant steel
Abrasion-resistant steel for highly stressed components in recycling and processing technology.
Material groups 1.1 and 1.2 per EN ISO 15608
Certified welding range for unalloyed and low-alloy structural steels in the MAG process 135.
Oxy-fuel and plasma flame cutting
CNC cutting on 2,000 × 4,000 mm; oxy-fuel up to 100 mm, plasma 1.5–20 mm steel, stainless steel and aluminium.
Location
Kaarst (Büttgen)
DEManufacturing and administration
- Lot size
- One-off parts to small series
- Materials
- Steel (S235, S355, Hardox), stainless steel (1.4301, 1.4404), aluminium
- Oxy-fuel/plasma cutting system 2,000 × 4,000 mm (2 units)
- Sheet shear 3,000 × 12 mm S235 / 3,000 × 8 mm stainless steel
- Press brake 200 t, 3,000 mm
- Kasto band saw, clamping width 400 mm
- Eisele circular saw, clamping width 100 mm
- Hydraulic hole punch 60 t
- Radial drilling machine, 1,000 mm reach
- Plate rolling machine up to 10 mm, 1,500 mm working length
- Fronius MAG/TIG welding machines
Typical components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Welding shop (MAG, process 135)Joining | – | – | – | – | Steel, Stainless steel, Aluminium |
| MAG welding certified to DIN EN 1090-2 EXC2 (process 135, material groups 1.1 and 1.2 perJoining | – | – | – | – | unalloyed structural steels (material group 1.1), low-alloy structural steels (material group 1.2) |
| TIG weldingJoining | – | – | – | – | Steel, Stainless steel, Aluminium |
| Oxy-fuel flame cuttingMachining | – | 4,000 mm × 2,000 mm | – | – | Steel (S235, S355), Sheet thicknesses up to 100 mm |
| Plasma flame cuttingMachining | – | 4,000 mm × 2,000 mm | – | – | Steel, Stainless steel, Aluminium |
| Sheet cutting (sheet shear)Machining | – | 3,000 mm | – | – | Steel (S235, up to 12 mm), Stainless steel (up to 8 mm) |
| Bending (press brake 200 t)Forming | – | 3,000 mm | – | – | Steel (S235, up to 10 mm), Stainless steel (V2A/V4A), Aluminium, Structural steels, Fine-grain structural steels |
| Sawing (band saw and circular saw, straight and mitre cuts)Machining | – | 400 mm (band saw clamping width) | – | – | Steel, Stainless steel, Aluminium |
| Hole punching / stamping (hydraulic hole punch, slotted, round and square holes, notching, flat andForming | – | – | – | – | Steel |
| Plate rolling (sheet thicknesses up to 10 mm)Forming | – | 1,500 mm | – | – | Steel |
| Drilling (radial drilling machine)Machining | – | 1,000 mm reach | – | – | Steel |
| Steel construction (load-bearing steel components, CE-marked up to EXC2)Assembly | – | – | – | – | Steel, Stainless steel |
| Plant engineering (planning, manufacturing, assembly of technical systems)Assembly | – | – | – | – | Steel, Stainless steel |
| Piping construction / piping prefabrication (ready-to-install assemblies, manifolds)Joining | – | – | – | – | Steel, Stainless steel (V2A/V4A, 1.4301, 1.4404), S235, S355 |
| Locksmith work (custom metalworking, repair and new fabrication)Assembly | – | – | – | – | Metal, Steel |
| Contract manufacturing of welded constructions and welded assembliesJoining | – | – | – | – | Steel (S235, S355), Stainless steel (1.4301, 1.4404), Aluminium, Hardox (abrasion-resistant steel) |
| Formwork constructionAssembly | – | – | – | – | Steel |
| Structural engineering / special constructions (incl. CAD drawings, structural planning)Engineering | – | – | – | – | Steel, Stainless steel, Aluminium |
| Manifold fabricationJoining | – | – | – | – | Steel, Stainless steel |
| Surface finishing (galvanizing, powder coating, priming, blasting)Surface | – | – | – | – | Steel |
| Steel construction for recycling plants (halls, platforms, conveyor structures, machine frames,Assembly | – | – | – | – | Steel |
| Silo systems and vessel fabrication (food industry, stainless steel)Assembly | – | – | – | – | Stainless steel (V2A/V4A) |
| Laser cuttingMachining | – | – | – | – | Steel, Stainless steel, Aluminium |
10 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Oxy-fuel/plasma cutting system | – | 2 | 2,000 x 4,000 mm; oxy-fuel up to 100 mm, plasma 1.5–20 mm | – | Kaarst |
| Sheet shear | – | – | Cutting capacity 3,000 x 12 mm for S235, 3,000 x 8 mm for stainless steel | – | Kaarst |
| Press brake 200 t | – | – | Bending length 3,000 mm, up to 10 mm S235 | – | Kaarst |
| Band saw | Kasto | – | Clamping width 400 mm, automatic feed, straight and mitre cuts | – | Kaarst |
| Circular saw | Eisele | – | Clamping width 100 mm, straight and mitre cuts | – | Kaarst |
| Hydraulic hole punch 60 t | – | – | Slotted, round and square holes, notching work, flat and profile cutting | – | Kaarst |
| MAG/TIG welding machines | Fronius | – | – | – | Kaarst |
| Radial drilling machine | – | – | 1,000 mm reach | – | Kaarst |
| Plate rolling machine | – | – | Sheet thicknesses up to 10 mm, working length 1,500 mm | – | Kaarst |
| Welding robot | – | – | – | – | Kaarst |
Additional services
Reference customers
Quality and certification
Production is subject to factory production control per EN 1090-1 (System 2+); welding in the MAG process 135 is carried out under welding supervision by an International Welding Specialist (IWS). Material is procured with 3.1 inspection certificates to EN 10204.
| Evidence | Kaarst (Büttgen) |
|---|---|
| EN 1090-2 (EXC2) | |
| EN 1090-1 FPC (System 2+) | |
| ISO 9001 |
Company history
- 1970
Company founded by Adolf Loersch in Neuss, construction of a hall with crane runway system
- 1971
Relocation to Kaarst-Büttgen, Gutenbergstraße
- 1980
Hall extension by 230 m² to 650 m²
- 1990
Handover from Adolf Loersch to Konrad Loersch and his wife Irmhild
- 1995
25th anniversary
- 2009
Purchase of a small oxy-fuel and plasma cutting system
- 2015
Marc Wankum and Nicole Wankum join the company
- 2017
Purchase of a large oxy-fuel and plasma cutting system
- 2020
50th anniversary
- 2022
Renamed Wankum Schweißerei und Stahlbau GmbH
- 2023
Initial certification to DIN EN 1090-2 (EXC2) by TÜV Rheinland