Plant and apparatus engineering, welding in stainless steel, aluminium, copper and steel as well as CNC-milled parts for the pharmaceutical, food and chemical industries
BK Metallform AG
Boswil · NiederlenzNew on Amplifa
About us
BK Metallform AG is a Swiss manufacturing company based in Boswil, formed in 2026 through the merger with AH Anlagen- & Apparatebau GmbH, founded in 2020. The company manufactures systems, vessels, piping and custom constructions for the pharmaceutical, food, chemical and energy industries as well as welded steel components for the defence industry, filter technology and design applications. The services include in-house CAD design, TIG and MIG welding, automated seam welding, circumferential welding, repair welding on mechanical engineering components, cast and aluminium components, CNC milling, prototype construction as well as rolling of sheet metal into cylindrical, conical or custom shapes. Materials processed include steel, stainless steel, chromium steel, aluminium, aluminium cast and copper. Production ranges from one-off items to series production at the Boswil (headquarters) and Niederlenz (welding site) locations.
- Site
- CH-5623 Boswil
- Processes
- Welding (TIG), MIG welding, Seam welding (longitudinal welding of shells), Circumferential welding, Repair welding, Rolling of sheet metal (sheet rolling, cylindrical, conical, custom shapes), CNC milling (machining), Plant and apparatus engineering (systems, vessels, piping, custom constructions)
- Materials
- Steel, Stainless steel, Chromium steel, Aluminium, Aluminium cast, Copper, Cast components (e.g. engine housings, gearbox parts)
- Certificates
- ISO certifications (available at both locations, specific standard not, ISO certifications
- Industries
- Pharmaceutical industry, Food industry, Chemical industry, Energy sector, Defence industry, Filter technology
- 01
Design and CAD development
- 02
Sheet metal rolling
- 03
Welding (TIG/MIG, straight and circumferential seams)
- 04
CNC milling
- 05
Surface finishing
- 06
Assembly of modules / plant and apparatus engineering
Materials & Processes
Steel
Welded steel components for the defence industry, filter technology and design applications.
Stainless steel
Vessels, piping and system components for the pharmaceutical and food industries.
Chromium steel
Components from the pharmaceutical and food sectors where tightness, cleanliness and appearance are critical.
Aluminium
Welded parts and lightweight constructions.
Aluminium cast
Repair welding of engine housings and gearbox parts.
Copper
Welded parts and piping for industrial applications.
Locations
Boswil
CHHeadquarters / Manufacturing
- Materials
- Steel, stainless steel, aluminium, copper
Niederlenz
CHWelding site
- Materials
- Stainless steel, steel, aluminium, copper
- Automated seam welding system
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Welding (TIG)Joining | – | – | – | – | Steel, Stainless steel, Aluminium, Copper |
| MIG weldingJoining | – | – | – | – | Steel, Stainless steel, Aluminium, Copper |
| Seam welding (longitudinal welding of shells)Joining | – | – | – | – | Stainless steel, Steel, Aluminium |
| Circumferential weldingJoining | – | – | – | – | Stainless steel, Aluminium, Copper |
| Repair weldingJoining | – | – | – | – | Aluminium cast, Cast, Chromium steel, Steel, Aluminium |
| Rolling of sheet metal (sheet rolling, cylindrical, conical, custom shapes)Forming | tight tolerances (not specified) | – | – | – | Sheet metal (material not specified) |
| CNC milling (machining)Cutting | – | – | – | – | – |
| Plant and apparatus engineering (systems, vessels, piping, custom constructions)Assembly | – | – | – | – | Stainless steel, Aluminium, Copper, Steel |
| Design and development (in-house CAD design)Engineering | – | – | – | – | – |
| Prototype construction & custom fabricationsEngineering | – | – | – | – | – |
| Surface finishingSurface | – | – | – | – | Steel |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Automated seam welding system | – | – | – | – | Niederlenz |
Additional services
Quality
The goods comply with the agreed specifications; ISO certifications exist at both locations and will be maintained in the course of the merger.
| Evidence | Boswil | Niederlenz |
|---|---|---|
| ISO certifications |
History
- 2020
Founding of AH Anlagen- & Apparatebau GmbH in Gränichen, Aargau
- 2025
Relocation of AH Anlagen- & Apparatebau GmbH to Niederlenz (October); previously an interim stay in Oftringen
- 2026
Merger of BK Metallform AG with AH Anlagen- & Apparatebau GmbH with retroactive effect from 01.01.2026; commercial register entry on 14.04.2026; the Boswil and Niederlenz locations are retained