Düma GmbH
Fraunhoferstr. 12
D-68309 Mannheim
Tel.: +49 621 7245092
Fax: +49 621 7245094
duema@t-online.de


Finned Tubes and Heat Exchangers from Düma Rippenrohre GmbH – Quality Since 1975 

Finned tubes for the highest demands in durability and heat transfer

Our rolled finned tubes are specifically designed for applications that require both excellent thermal conductivity and mechanical strength. In a special rolling process similar to thread rolling, a thermally conductive material such as aluminum or copper is firmly bonded to a core tube, creating a continuously manufactured spiral finned tube. These fins are extremely resilient due to the roll hardening and firmly bonded to the core tube, ensuring exceptional durability. In addition, the uniform fin material means there is no risk of crevice corrosion. The profile of the fins is specially designed to ensure optimal heat transfer.

Rolled finned tubes are available in two versions:

  • Bi-metal finned tubes with inner tube for specific requirements in different temperature ranges.
  • Mono-metall finned tubes without inner tube, ideal for uniform heat transfer requirements.

Our finned tubes are used in various industrial sectors, including:

  • Gas coolers
  • Gas heaters
  • Process coolers
  • Air coolers and cooling towers
  • Gas condensers
  • Dry heating systems

In addition, we offer special corrugated base finned tubes, which are characterized by high flexibility and efficiency.

Bi-Metal finned tubes

Inner tube: Flexible choice of material and quality to suit your requirements
​Ribs: Aluminum

Mono-Metall finned tubes

corrugated base finned tubes

standard dimensions

​Here you will find an overview of the standard dimensions of our different pipe types

Mono-Metal finned tubes & Bi-Metal finned tubes

​max. fin height 18mm, max. tube diameter 51mm

Andere Abmessungen auf Anfrage

Request for custom-made finned tubes 

Please state the required quantity and the exact dimensions of the finned tubes in your request. We manufacture the finned tubes precisely according to your specifications in the required installation length and produce unfinned ends according to your dimensions. Optionally, we also supply the finned tubes with cast-on support rings. Simply send your request by email - we will be happy to advise you and create an individual offer for you.

​Aluminum ribbed
inner tube any

​ medium-high ribs

​Fins: Copper
Inner tube: Brass

Aluminium

Aluminium

Cooper

Aluminium

​corrugated base finned tubes

​Corrugated base finned tubes are manufactured in steel – black, galvanized, powder coated or in stainless steel.

​D= 10 mm to 108 mm
L= max. 9000 mm
Rib height = 10 mm to 50 mm
Rib thickness from 0.3 mm to 1.2 mm 
Standard program: Folded ribs

Other dimensions on request