Boiler Services
Our exprience in boilers goes back to 1883 when the „Dürr Kesselwerke“ was founded. Nowadays NEM Balcke-Dürr is a service provider for OEM and -non-OEM boiler.
Engineering and capabilities
- Inspection, root cause analysis and consultation
- Boiler process optimization studies in regards to performance, life time extension and fuel replacement
- Design and optimization of new heating surface and bundles
- Boiler overhaul including firing technology
- Site works including disassembly and installation
Pressure Parts – Bundles
Heat exchanger bundles for evaporation, super heating and re-heating of boiler steam. No matter if it’s a header-type design or single harp design, we are able to exchange and improve any bundle type. 1:1 replacement or with addtional protective equipment such as coating (Cladding), shells or baffle walls.
- OEM and non-OEM applications
- Usage in various boiler areas (evaporator / superheater / reheater / economizer etc.)
- Single or divided bundles, header-tube or single harp design
- Exchange via roof, from the ground, via boiler house side walls or through the ash hopper from the ground up
- Max. bundle specification: -100 t and 3.500 x 4.500 x 8.000 mm (W x H x L)
Pressure Parts – Membrane walls
Membrane wall panels (tube-fin-tube design) for evaporator heating surfaces with product specification and granted conformity according to original design or harmonized standard. Adjustment of existing design by applying protective coating (cladding). A variety of specifications for material, layer, technique etc. can be considered.
- Tube-Fin-Tube design
- Horizontal, vertical & diagonal alignment
- Tube pitch up to 120 mm
- Installation of single segments / panels
- Max. dimension of 1.000 mm x 6.500 mm per panel
- Quality documentation
- NDT during installation process by UT (Phased Array Method)
- MT & VT experience allowing reduction of X-ray windows and minimization boiler downtimes
Cladding
Protective Coating of membrane walls (single or double sided possible), sole heat exchanger tubes and headers by weld overlay. Special Ni- based alloys will be welded manually or automatically on to the base material. Ensurance a maximum of Fe-content in the overlap area of base material and coating. Thickness can be chosen individually from 1 to 2 mm.
- Thermanit 625, 686
- Workshop cladding with ≤ 3% Fe-content and 1-2 mm thickness
- On site repair cladding manually with ≤ 8% Fe-content and 2 mm thickness
- On site connection of cladded parts by InCla-Welding method (non-alloyed root layer– austenitic filler and cover layer)
- Applicable for various parts (tubes, headers, membrane walls, fins)
Boiler Service and auxiliaries
From single inspection up to preventive maintenance of boiler pressure parts, we offer a broad range of services.
Complementary solutions in regards to maintenance of high pressure systems and auxiliaries are standard practices for us.
Extract from our service competences
- Pressure parts as tailor-made solutions or specific replacements
- Inspection and exchange of safety valves & silencers
- Maintanence of secondary & tertiaire air circulation as well as NH3 injection system
- Replacement or overhaul of headers, steam drums or injection coolers
Installation & Disassembly / Site Works
Based on our tailor-made installation concepts we will exchange any boiler part to ensure and increase availability. Starting from on site inspection, developing individual solutions as well as risk assesments, we will constantly find a suitable way for realisation of our client’s desired project scope.
- Installation studies
- Installation concepts and execution (e.g. access & transport routes, lifting plan, welding technology)
- Project management, site supervision, quality control, HSE management
- Establishing single point of contact to the customer
- Quality documentation
- Highest requirements towards Safety
Wheater it’s nuclear or geothermal or other fields of energy. NEM Balcke-Dürr Heat Exchangers are applied throughout the whole energy landscape.
Uwe Hensch
Director of Product Development