Decoupling elements, bellows, compensators and leak-free cooling pipes for automotive and industrial applications
SJM GmbH
Ludwigshafen am Rhein, GermanyNew on Amplifa
About SJM
SJm GmbH, founded in 1997 and based in Ludwigshafen am Rhein, is the German sales and support company of the SJM Group. The group develops and manufactures decoupling elements and flexible solutions for exhaust technology and thermal management, including bellows, compensators, expansion fittings, elastic couplings and leak-free cooling pipes. Its core industries include the automotive industry, commercial vehicles, shipbuilding and LNG shipping, nuclear power, rail vehicles and electromobility. Development uses FEA modelling, CFD simulation and in-house prototype manufacturing; tools and machines for component production and mass production are built 100% in-house. Manufacturing takes place at decentralised production sites of the group worldwide; the Ludwigshafen site is responsible for sales, project management and technical support for projects in Europe, India, Africa and South America, supporting projects along the entire value chain up to series production.
- Site
- Ludwigshafen am Rhein
- Processes
- Manufacture of decoupling elements / flexible elements (exhaust technology, thermal management), Manufacture of leak-free cooling pipes, Tool and machine building (100% in-house, for component production and mass production), Prototype manufacturing, FEA modelling (simulation), CFD simulation, Testing and validation technology, Development and production of bellows
- Materials
- FEA modelling, CFD simulation, Bellows manufacturing, Compensators, Leak-free cooling pipes
- Certificates
- ISO 9001, ISO 14001, ISO 45001, IATF 16949, TISAX/ISO 27001, ASME U-Stamp, KEPIC, TISAX / ISO 27001, KEPIC (Nuclear technology)
- Founded
- 1997
- Industries
- Automotive industry, Commercial vehicles (Heavy Duty Trucks), Shipbuilding / LNG shipping, Nuclear power, Rail vehicles, Electromobility
- 01
Research & Development (FEA, CFD, prototype manufacturing)
- 02
Tool and machine building (100% in-house)
- 03
Production / mass production
- 04
Quality management
- 05
Sales, project management & technical support
Materials & Processes
FEA modelling
Simulation technology for efficient, targeted product development.
CFD simulation
Flow simulation for the design of decoupling and thermal management solutions.
Bellows manufacturing
Flexible elements for decoupling tasks developed and produced since 1975.
Compensators
For piping systems in shipbuilding and LNG shipping with U-Stamp approval.
Leak-free cooling pipes
Cooling solutions for thermal management, especially electromobility.
Sites
Ludwigshafen am Rhein
DESales, project management, technical support
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of decoupling elements / flexible elements (exhaust technology, thermal management)Assembly | – | – | – | – | – |
| Manufacture of leak-free cooling pipesJoining | – | – | – | – | – |
| Tool and machine building (100% in-house, for component production and mass production)Engineering | – | – | – | – | – |
| Prototype manufacturingEngineering | – | – | – | – | – |
| FEA modelling (simulation)Engineering | – | – | – | – | – |
| CFD simulationEngineering | – | – | – | – | – |
| Testing and validation technologyTesting | – | – | – | – | – |
| Development and production of bellowsForming | – | – | – | – | – |
| Development and production of expansion fittings for piping systemsForming | – | – | – | – | – |
| Manufacture of compensators (including for ships, LNG shipping)Forming | – | – | – | – | – |
| Development and production of elastic couplings for automobilesAssembly | – | – | – | – | – |
Additional services
Quality & Certifications
Continuous quality management and comprehensive inspections accompany production; the group is certified to ISO 9001, ISO 14001, ISO 45001, IATF 16949, TISAX/ISO 27001, ASME (U-Stamp) and KEPIC.
| Evidence | Ludwigshafen am Rhein |
|---|---|
| ISO 9001 | |
| ISO 14001 | |
| ISO 45001 | |
| IATF 16949 | |
| TISAX / ISO 27001 | |
| ASME U-Stamp | |
| KEPIC (Nuclear technology) |
History
- 1975
Foundation of Sungjin Machinery Co., Ltd.; first local production of bellows
- 1976
Development and production of expansion fittings for piping systems
- 1985
Development and production of elastic couplings for automobiles
- 1989
Joint venture Calsonic Korea (CKI)
- 1991
Foundation of a Malaysian company (Benua Sakti Sdn. Bhd.)
- 1996
Renamed SJM Co., Ltd.; ISO 9001 certification
- 1997
Stock exchange listing; foundation of SJM GmbH Ludwigshafen; foundation of SJM FLEX SA (PTY) Ltd in South Africa; QS 9000 certification
- 2001
Foundation of SJM North America Inc (USA)
- 2002
ISO 14001; U-Stamp (ASME); compensator for LNG shipbuilding
- 2003
KEPIC certification (nuclear technology)
- 2005
ISO/TS 16949 certification
- 2006
Foundation of Yantai Corporation in China
- 2010
Foundation of SJM Holdings
- 2012
Foundation of Changsha Chengjin Railway Shipbuilding Co., Ltd. (China)
- 2015
Office in Shanghai; foundation of SJMFLEX de MEXICO S de RL de CV
- 2016
Japan office founded
- 2018
Relocation of SJM GmbH to the Raschig building; IATF 16949 certification
- 2019
Foundation of SJMFLEX MAROCCO SARL AU (Morocco)
- 2021
Foundation of the SJMH EV joint venture
- 2025
Foundation of SJM FLEX INDIA PRIVATE LIMITED