CHEMICAL PROCESS ENGINEERING
Welded Block Heat Exchangers for Chemical Processes
Select a welded block heat exchanger around the chemical composition, thermal duty and maintenance requirements of the process.
- Define the process and composition
- Provide the complete fluid specification for both circuits, not only the main chemical name. Include concentration ranges, impurities, solids and relevant fluid properties at operating temperature. Identify batch variation, startup and cleaning conditions.
- Match the exchanger to the duty
- Separate sensible heating or cooling from condensation, evaporation and reboiling. Specify the desired outlet conditions, flow range and available pressure drop. Where phase change occurs, provide the operating pressure and composition information needed for the thermal assessment.
- Select the wetted system
- Evaluate plate alloys, welds, panel seals and connections together. For sulfuric acid, caustic or chloride-containing streams, obtain a project-specific materials assessment rather than relying on a broad alloy label. Fluid-specific suitability must be confirmed before a proposal is accepted.
- Include cleaning in selection
- Review fouling, cleaning chemicals and inspection access before fixing the layout. Removable covers permit access to the channel groups; the welded core remains assembled. Confirm service clearance, cleaning method and documentation requirements.
- Prepare an engineering enquiry
- Send the fluid data, heat balance and installation constraints. For replacement projects, add the existing datasheet and drawings. The assessment should identify the selected construction, thermal performance, materials and any unresolved process requirements.
Send Your Process Data for Heat Exchanger Selection
Provide both fluids, flow rates, inlet and outlet temperatures, operating and design pressures, allowable pressure drop and material requirements. For a replacement, include the nameplate and arrangement drawing.