Sell Copper-Nickel Heat Exchangers From Pulp and Paper Facilities

Copper-Nickel Heat Exchangers in Pulp and Paper

Copper-nickel alloys, particularly CuNi 90/10 (UNS C70600), are extensively used for heat exchangers in shipbuilding, offshore, and desalination applications due to their excellent resistance to uniform corrosion, localized corrosion in chlorinated seawater, and biofouling. The corrosion protection is primarily provided by a cuprous oxide film formed during the initial anodic reaction. In a pulp or paper mill, the documented process context matters: The pulp and paper industry relies heavily on heat exchangers for process heating, chemical recovery, and energy efficiency. Key applications include blow heat recovery systems, where heat exchangers capture thermal energy from digester blow gases, and multiple-effect evaporators, which concentrate black liquor by evaporating water using steam.

This page combines the approved copper-nickel heat exchangers identification record with the approved pulp and paper process record. It does not infer condition, suitability, ownership, or value from an industry label alone.

Identification and documentation checklist

A seller should connect the physical unit to its service and records before requesting evaluation. For this intersection, document both the asset construction and its actual pulp and paper duty.

• Magnetic permeability should be lower than 1.5.
• Weld necks must not show a cast structure.
• Requires hot forging or cold working with recrystallisation anneal.
• Compliance with international standards (DIN/EN, ASTM, ISO, EEMUA) is critical.
• Verify system role (e.g., blow heat recovery, evaporator, or preheater).
• check for material specifications suitable for corrosive Kraft liquors.

Condition and value factors

Copper-nickel heat exchangers offer excellent resistance to uniform corrosion and localized corrosion in chlorinated seawater. That technical characteristic is only one input; current condition, completeness, documentation, demand fit, installed scope, and logistics also influence review.

Designed for high-fouling and corrosive environments typical of pulp and paper mills. Service history and residual-process disclosure should therefore be evaluated with the equipment record rather than treated as an automatic positive or negative value conclusion.

• Current photographs and readable nameplate
• Dimensions, weight, quantity, and installation state
• Known metallurgy and service fluid
• Inspection, cleaning, repair, and operating history
• Seller authority and intended disposition timing

Commercial review boundary

Submission requests a fact-based buying review. It does not guarantee purchase, price, payment timing, removal, loading, freight, or reuse. Those terms require separate written confirmation after the equipment and project facts are reviewed.