
Manufacture of vessels, apparatuses and steel structures as well as assembly of industrial plants

MESSER Industriemontagen & Apparatebau GmbH
Heringen (Werra)New on Amplifa
About MESSER Industriemontagen & Apparatebau
MESSER Industriemontagen & Apparatebau GmbH in Heringen (Werra) manufactures vessels, apparatuses, pressure vessels, tanks to DIN, vessels under AwSV, heat exchangers, drying drums, piping and steel structures to EN 1090-2 EXC 3. Materials processed include unalloyed carbon steels, S235 to S460, alloyed CrNi steels (stainless steel) and special steels using manual arc welding, submerged arc welding and MAG/TIG processes. The group comprises WSM Messer Spezialmontagen GmbH (special assembly including steelworks technology, power plant construction, cement plants, plant relocation) and Messer Personalservice with more than 220 qualified employees. Customers come from steel production, power plant construction, the cement industry, chemicals, process engineering, the edible oil industry as well as potash/salt and environmental technology, including K+S, Salzgitter, Wintershall, Solvay and LAFARGE. Range of services: planning and design, manufacturing, industrial assembly, repairs, pipework, surface treatment and quality inspection including transport and commissioning.
- Site
- Heringen (Werra)
- Processes
- Manual arc welding (111), Submerged arc welding (121), Metal active gas welding tMAG (135), Metal active gas welding with flux-cored electrode MAGF (136/138), Tungsten inert gas welding TIG (141), Apparatus and vessel construction (pressure vessels, vacuum vessels, tanks to DIN, vessels under, Manufacture of drying drums, Manufacture of heat exchangers
- Materials
- S 235, S 275, S 355, S 460, CrNi steels (stainless steel), Unalloyed carbon steels (mild steel), Special steels, Unalloyed carbon steels
- Certificates
- DIN EN ISO 9001:2015, DIN EN ISO 45001:2023, AD 2000 Merkblatt HP0 / DIN EN ISO 3834-2, EN 1090-2:2018, Certificate under water law (certified specialist company), Certificate under AÜG (permit for commercial temporary staffing), Welding approvals (PED 2014/68; EN 1090-2 EXC 3; processes, ISO 9001, ISO 45001, EN 1090, AD 2000 HP0 / EN ISO 3834-2, Water law (certified specialist company)
- Founded
- 1947
- Employees
- 220+ (MESSER Group)
- Industries
- Steel production and steel processing, Power plant construction/energy, Cement production, Chemicals, Process engineering, Petrochemicals
- 01
Planning and design
- 02
Steel cutting and prefabrication
- 03
Welding fabrication (apparatus and vessel construction)
- 04
Surface treatment (corrosion protection)
- 05
Testing (pressure, weld seam and leak testing)
- 06
Assembly incl. transport and commissioning
Materials & Processes
S 235
Structural steel for welded steel and vessel structures to EN 1090-2.
S 355
High-strength structural steel for load-bearing steel structures.
S 460
Highest-strength structural steel for highly stressed welded components.
CrNi steels (stainless steel)
Rust-resistant and acid-resistant steels for apparatuses in the chemical and food sectors.
Unalloyed carbon steels
Mild steels for pressure vessels, tanks and drying drums.
Site
Heringen (Werra)
DEAdministrative headquarters and manufacturing site (Lengers district)
- Part weight / size
- up to approx. 60 t per component
- Lot size
- One-off production to series
- Materials
- S235–S460, CrNi steels, special steels
- Cranes 5 t and 10 t
- Production hall 330 sqm (1960)
- Second hall 550 sqm (1962)
Manufactured Apparatuses & Structures





Inside the production




Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manual arc welding (111)Joining | – | – | – | – | S 235, S 275, S 355, S 460, CrNi steels |
| Submerged arc welding (121)Joining | – | – | – | – | S 235, S 275, S 355, S 460, CrNi steels |
| Metal active gas welding tMAG (135)Joining | – | – | – | – | S 235, S 275, S 355, S 460, CrNi steels |
| Metal active gas welding with flux-cored electrode MAGF (136/138)Joining | – | – | – | – | S 235, S 275, S 355, S 460, CrNi steels |
| Tungsten inert gas welding TIG (141)Joining | – | – | – | – | CrNi steels, S 235, S 275, S 355, S 460 |
| Apparatus and vessel construction (pressure vessels, vacuum vessels, tanks to DIN, vessels underWelding/vessel construction | – | approx. 26 m (deodorizing column) | up to approx. 60 t (drying drums/heat | One-off production – Series | mild steel, stainless steel, unalloyed carbon steels, alloyed CrNi steels, special steels |
| Manufacture of drying drumsWelding/vessel construction | – | 25 m × Diameter up to approx. 5 m | 60 to | – | unalloyed carbon steels, alloyed CrNi steels, special steels |
| Manufacture of heat exchangersWelding/vessel construction | – | 20 m | approx. 60 t | – | stainless steel, mild steels |
| Pipework (prefabrication and assembly)Joining | – | – | – | – | all materials, processes and diameters as specified |
| Steel construction / welded structures (EN 1090-2 EXC 3)Joining | – | – | – | – | S 235, S 275, S 355, S 460 |
| Industrial assembly and disassembly of industrial plantsAssembly | – | – | – | – | – |
| Repairs and restoration of industrial plantsAssembly | – | – | – | – | – |
| Plant relocation (dismantling, transport, reassembly, commissioning)Assembly | – | – | – | – | – |
| Planning and design (draft, design and calculation)Engineering | – | – | – | – | – |
| Surface treatment / surface finishing (corrosion protection)Surface | – | – | – | – | – |
| Visual testing level 2 (VT)Testing | – | – | – | – | – |
| Dye penetrant testing level 2 (PT)Testing | – | – | – | – | – |
| Pressure, weld seam and leak testingTesting | – | – | – | – | – |
Additional services
Reference customers
Quality & Certifications
Quality inspection includes structural, pressure, weld seam and leak testing as well as visual testing (VT) and dye penetrant testing (PT) level 2. Welding approvals are held to AD 2000 HP0 / DIN EN ISO 3834-2, EN 1090-2 EXC 3 and PED 2014/68.
| Evidence | Heringen (Werra) |
|---|---|
| ISO 9001 | |
| ISO 45001 | |
| EN 1090 | |
| AD 2000 HP0 / EN ISO 3834-2 | |
| Water law (certified specialist company) |
Company History
- 1947
Founding of the assembly company KARL MESSER & Söhne by Karl Messer on 1 September
- 1955
Rename to KARL MESSER KG
- 1960
Commissioning of production at the Heringen-Lengers site on 330 sqm; focus on piping, steel and vessel construction
- 1962
Second hall at the Lengers site with 550 sqm of floor space, 5 t and 10 t cranes
- 1964
Hans Messer takes over company management after the death of his father Karl
- 1974
Rename to KARL MESSER GmbH & Co. KG on 1 January
- 2005
On 1 May, Dipl.-Ing. Michael Klebsch takes over the assets of Karl Messer GmbH & Co. KG i. I. and founds the successor company Messer Industriemontagen & Apparatebau GmbH
- 2009
Manufacture of a combined condenser (ø approx. 5 m, length approx. 18 m, approx. 56 t) for a power plant in Holland
- 2010
Assembly of an asphalt mixing plant for the company Amman in Winterberg; replacement of the lock gate in Bamberg
- 2012
Manufacture of a deodorizing column (ø approx. 3.5 m, approx. 26 m long, approx. 30 t) for an edible oil factory in NRW
- 2023
Manufacture of two storage vessels for K-Ley GmbH & Co. KG; renewal of an extraction system (approx. 370 m) for the Salzgitter steelworks
- 2024
Manufacture and assembly of a dissolving apparatus as well as drum divider renewal for K+S Hattorf site
- 2025
Manufacture and assembly of two storage tanks and two lamella clarifiers (each approx. 45 t) for K+S Hattorf site
- 2026
First implementation of a customer project with Pillowplates (cooling pipe, ø 750 mm) for a research institute