Power Plant Maintenance Works in Vienna
Austria | In late July and early August 2026, a 25-person PRO-Welding team carried out a comprehensive scope of maintenance and repair works at a major power generation facility in Vienna. The scope included biomass handling and feeding systems, boiler systems, valve replacement, industrial piping and welding works. Completed welded joints were subject to the required quality control, including NDT.
Due to the scale of the project, the team was divided into several smaller crews working in parallel across different areas of the plant.
| Information | Project details |
|---|---|
| Location | Vienna, Austria |
| Facility type | Large power generation facility |
| PRO-Welding team | 25 specialists |
| Project duration | Approx. 3 weeks |
| Main scope of work | Boiler systems, biomass handling and feeding systems, valves, industrial piping |
| Welding works | Repairs, build-up welding, valve and piping installation |
| Quality control | VT, PT, MT and RT – depending on the inspection requirements for each component |
KEY PROJECT INFORMATION
Scope of Work
| Scope | Work performed |
|---|---|
| Biomass handling and feeding systems | Replacement of chains, sprockets, bearings, feeder components, conveyors and worn steel plates |
| Boiler systems | Repair and replacement of selected components, build-up welding on worn tubes, work on sootblower components, and reconstruction of a section of ducting using heat-resistant steel plate |
| Valves | Removal and installation of valves, ranging from small units to components weighing several tonnes |
| Industrial piping | Replacement of worn piping sections and installation of new pipework |
| Welding works | Welded joints for valves, piping, and repaired or replaced installation components |
| Quality control | VT, PT, MT and RT, applied according to the inspection requirements for individual components |
BIOMASS HANDLING AND FEEDING SYSTEM MAINTENANCE
One of the main work packages involved equipment used for transporting and feeding biomass to the boiler.
Due to continuous operation and mechanical wear, a number of system components required repair or replacement. The PRO-Welding team carried out maintenance works on feeders, conveyors and other mechanical components of the biomass handling system.
The scope included:
- replacement of worn chains,
- replacement of sprockets,
- replacement of bearings,
- maintenance of feeders and conveyors,
- servicing of screw feeder components,
- replacement of worn steel plates in material handling lines,
- removal and installation of other worn mechanical components.
The works therefore covered both standard wear parts and larger components of the biomass handling and feeding system.
REPAIR AND REPLACEMENT OF BOILER SYSTEM COMPONENTS
Another work package covered maintenance and repair activities within the boiler systems. Depending on the technical condition of individual components, the team carried out either replacement or local repair works.
The scope included work on sootblower components as well as tubes located inside the boiler.
Where wear or reduced wall thickness had been identified, build-up welding was carried out on worn tube sections to restore the affected areas.
The team also reconstructed a section of ducting from heat-resistant steel plate, replacing an existing component that had reached the end of its service life.
Part of the work was performed inside the equipment and in areas with restricted access, requiring careful preparation of work locations and coordination of the individual activities.
VALVE REPLACEMENT – FROM SMALL UNITS TO COMPONENTS WEIGHING SEVERAL TONNES
One of the most demanding work packages involved the replacement of worn valves and associated piping components within the plant systems.
The PRO-Welding team worked with components of widely varying sizes – from small valves to large units weighing several tonnes.
For the largest valves, the challenge extended well beyond welding the new connections. The entire replacement operation had to be carried out within the existing installation and in areas with restricted working space.
The scope included:
- removal of worn valves and associated components,
- preparation of components for removal from the system,
- handling and removal of dismantled equipment,
- transport of new components to the installation area,
- preparation of the installation location,
- positioning and fit-up of new valves,
- preparation of joints for welding,
- execution of welding works.
The weight and dimensions of the largest components required careful planning and coordination of the handling, installation and welding sequence.
Accurate positioning and fit-up of the new valves within the existing piping system were also essential before the final welded connections could be completed.
REPLACEMENT AND INSTALLATION OF INDUSTRIAL PIPING
In parallel with the valve replacement works, the PRO-Welding team carried out the replacement of worn piping sections and installation of new pipework.
Where required by the condition of the existing system, worn sections were removed and replaced with new components.
The scope included:
- removal of worn piping sections,
- preparation of installation areas,
- fit-up of new components,
- installation of new piping sections,
- installation of valves,
- execution of welded joints.
The project also involved work on larger piping components. Their dimensions required adequate preparation of the working area as well as accurate positioning and alignment with the existing piping system prior to installation.
ON-SITE WELDING WORKS
Welding formed an integral part of several work packages carried out during the project.
Welding activities were performed as part of:
- installation of new valves,
- replacement and installation of piping sections,
- repair of existing plant components,
- build-up welding on worn boiler tubes,
- installation of components reconstructed during the maintenance works.
Some of the welded joints were completed directly on existing plant systems and in areas with restricted access.
Under these conditions, successful execution depended not only on the quality of the weld itself, but also on proper joint preparation, accurate positioning, alignment and fit-up of the components before welding began.
WELDING AND FITTING TEAMS FOR INDUSTRIAL MAINTENANCE PROJECTS
The project involved 25 PRO-Welding specialists, divided into several smaller crews responsible for individual work packages.
Over approximately three weeks, the teams worked in parallel on biomass handling systems, boiler systems, valves and industrial piping, while also carrying out installation, repair and welding works.
The project demonstrates PRO-Welding’s ability to deploy a larger multidisciplinary team and execute several related maintenance, mechanical, piping and welding work packages simultaneously within a single industrial project.
PRO-WELDING INDUSTRY SERVICES – MAINTENANCE, INSTALLATION AND WELDING SERVICES FOR INDUSTRY
We provide maintenance, installation and welding services for industrial and power generation facilities in Poland and across Europe.
Depending on the project scope, we deploy specialised crews or larger multidisciplinary teams capable of carrying out several work packages across industrial installations in parallel.
Planning a plant overhaul, modernisation or maintenance project? Contact us and send us your project scope.
PROJECT ENQUIRIES & COOPERATION
- a.cieslik@pro-welding.eu
- k.doniec@pro-welding.eu
OFFICE HOURS
- Mon-Fri: 8:00–16:00
- office@pro-welding.eu
URGENT WELDING TEAM MOBILISATION
For urgent welding team requirements, please contact us directly:
+48 666 664 469, +48 666 663 916.
SEE MORE PROJECTS
