Planning and construction of pipelines for gas, water, district heating and electricity in Hamburg and northern Germany.
KS Rohrleitungsbau Sewerin GmbH & Co. KG
HamburgNew on Amplifa
About us
KS Rohrleitungsbau Sewerin GmbH & Co. KG is a construction company from Hamburg specializing in pipeline and plant construction for gas, water, district heating, electricity and optical fiber. The company plans and builds pipelines in all materials and for all diameters and operating pressures, including underground, surface and road paving work as well as house connections and interior installations. Further services include pipeline network repair and rehabilitation, plant construction up to PN100, pressure tests according to DVGW G469 and W400 as well as suction excavator work. Since September 2024 the company has belonged to Hamburger Energiewerke GmbH, where it supports the expansion of the district heating network; it remains active in the market as an independent brand in pipeline construction for other companies. The workforce comprises around 63 employees, and revenue in 2023 was 6.5 million euros. Its service area is Hamburg, Schleswig-Holstein and Lower Saxony, complemented by a 24/7 emergency service for utilities.
- Site
- Hamburg
- Processes
- Gas pipeline construction (new construction/renewal of gas house connections in all materials incl., Gas installation work within buildings, Gas pipeline network repair and rehabilitation work, Gas plant construction up to PN100 in all materials, Pressure tests according to DVGW G469 B3, C3 up to 25 bar, Welding work (welders according to DIN EN 9606-1; GW128, GW330, GW331, GW129), Flange installation (flange installers according to DIN 1591-4), Water pipeline construction (all operating pressures, nominal sizes up to DN 400, incl. underground
- Materials
- Steel, Copper, Cast iron, Rigid PVC, AZ (asbestos cement), PE-HD, Asbestos cement (existing pipelines)
- Certificates
- DVGW approval GW 301 (G1, all operating pressures), DVGW approval GW 301 (W2, up to DN 400), AGFW FW601 FW2, DVGW GW381, DVGW G666 contract installation company, DVGW GW 301 G1, DVGW GW 301 W2, AGFW FW 601 FW2, DVGW GW 381, DVGW G 666, TRGS 519
- Founded
- 2008
- Employees
- 63
- Industries
- Energy supply, District heating, Gas, Water, Telecommunications (optical fiber)
- 01
Planning/Engineering
- 02
Civil engineering (underground and surface work)
- 03
Pipeline construction and welding work
- 04
Plant construction
- 05
Pressure tests
- 06
Installation/Commissioning
Materials/Processes
Steel
Interior installations and gas systems up to PN100, welding work according to DIN EN 9606-1.
Copper
Installation work for gas and water pipes within buildings.
Cast iron
Water pipes up to DN 400 including underground and road paving work.
Rigid PVC
Material for water pipes up to DN 400.
PE-HD
Material for buried water pipes up to DN 400.
Asbestos cement (existing pipelines)
Material in the rehabilitation of existing water networks.
Locations
Hamburg
DEHeadquarters / Operational site
- Materials
- Steel, Copper, Cast iron, Rigid PVC, PE-HD
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Gas pipeline construction (new construction/renewal of gas house connections in all materials incl.Installation | – | – | – | – | Steel, Copper |
| Gas installation work within buildingsInstallation | – | – | – | – | Steel, Copper |
| Gas pipeline network repair and rehabilitation workInstallation | – | – | – | – | – |
| Gas plant construction up to PN100 in all materialsInstallation | – | – | – | – | – |
| Pressure tests according to DVGW G469 B3, C3 up to 25 barTesting | – | – | – | – | – |
| Welding work (welders according to DIN EN 9606-1; GW128, GW330, GW331, GW129)Joining | – | – | – | – | Steel |
| Flange installation (flange installers according to DIN 1591-4)Installation | – | – | – | – | – |
| Water pipeline construction (all operating pressures, nominal sizes up to DN 400, incl. undergroundInstallation | – | – | – | DN 400 | Steel, Cast iron, Rigid PVC, AZ, PE-HD |
| Pressure tests according to DVGW W400 up to 25 barTesting | – | – | – | – | – |
| Renewal/new construction of water house connections incl. underground, road paving andInstallation | – | – | – | – | – |
| District heating pipelines, new construction and repairInstallation | – | – | – | – | – |
| Electricity pipeline construction (power lines)Installation | – | – | – | – | – |
| Optical fiber pipeline constructionInstallation | – | – | – | – | – |
| Suction excavator workOther | – | – | – | – | – |
| Planning and construction of pipelines in all materials, for all diameters and operating pressuresEngineering | – | – | – | – | Steel, Cast iron, Rigid PVC, AZ, PE-HD, Copper |
| Civil engineering (underground and surface work, road paving work)Other | – | – | – | – | – |
Additional services
Reference customers
Quality
Approvals according to DVGW GW 301 (G1 and W2), AGFW FW 601 FW2 and DVGW GW 381; pressure tests according to DVGW G 469 and W 400 up to 25 bar. Active as a contract installation company according to DVGW worksheet G 666, with technical competence according to TRGS 519.
| Evidence | Hamburg |
|---|---|
| DVGW GW 301 G1 | |
| DVGW GW 301 W2 | |
| AGFW FW 601 FW2 | |
| DVGW GW 381 | |
| DVGW G 666 | |
| TRGS 519 |
History
- 2008
Founded on 02.07.2008, registered at the Hamburg Local Court (HRA 108601).
- 2024
Acquired by Hamburger Energiewerke GmbH (September 2024); continued as an independent brand, dual leadership of Wilfried Saalmann and Simon Miller.