Student paper

Future technologies for hydrogen transportation: the challenge of welding plastic pipes

Bachelor or Master Thesis

The aim of this thesis is to investigate the behavior of plasma-coated and glass fiber-reinforced thermoplastic pipes during hot plate welding. To what extent do the different processes affect the weld seam quality and the condition of the plasma coating after the welding process?

The use of hydrogen is essential to achieve the goals of climate neutrality. Both the production and storage of hydrogen offer long-term cost reduction potential in the periphery of the system
through the use of plastic pipes. A prerequisite for the use of plastic pipes is modification by applying a plasma coating on the inside to ensure the diffusion barrier. In addition, the plastic pipes are wrapped with glass fiber-reinforced tape on the outside to ensure the required compressive strength. Due to different dimensions, connection areas or bends, such pipes cannot be manufactured in one piece, but must be joined piece by piece. Hot plate welding, which has been established in pipeline construction for decades, is suitable for this purpose.


Stuwi-Wasserstofftransport-Herausforderung-Schweißen-Kunststoffrohre
Schematische Darstellung der Wasserstofftransport-Infrastruktur (links) des Aufbaus eines plasmabeschichteten Rohres für den Wasserstoffeinsatz (rechts)

The work is related to this research project:

As part of a public research project, the Joining Technology working group is carrying out investigations into hot plate welding. In addition to butt welding, socket welding is also used as a second method to compare the results of the material-locked joints. In addition to the bond strength of the weld seam, the thermal and mechanical influence on the plasma coating is also investigated.

Objective:

The aim is to investigate the behavior of plasma-coated and glass fiber-reinforced thermoplastic pipes during hot plate welding. To what extent do the different processes affect the weld seam quality and the condition of the plasma coating after the welding process?

Your tasks could be as follows:

Thematic familiarization with the topic of hot plate welding of pipelines Thematic familiarization with the topic of hot plate welding of pipelines
Carrying out welding tests Application of plasma layers
Optical and mechanical examination of the weld seam Carrying out welding tests
Analysis of the plasma coating before and after welding with regard to the diffusion barrier Optical and mechanical examination of the weld seam
Documentation of the results Analysis of the plasma coating before and after welding with regard to diffusion barrier
Documentation of the results

Your profile

Preferred study programs

At the RWTH Aachen

  • Mechanical engineering / industrial engineering, specializing in mechanical engineering
  • General mechanical engineering
  • Materials science
  • Industrial engineering, specialising in materials and process engineering
  • Environmental engineering

At the FH Aachen

  • Applied Polymer Science (M.Sc.)

What sets you apart

  • Technical or scientific studies
  • Independent, structured and autonomous work
  • Interest in working on industry-related research projects
  • Enjoy practical work