CB14-MAX

Common issues

• Internal leakage between media circuits from brazed-joint fatigue cracking
• External leakage at pipe connections or connection gaskets
• Fouling/scaling reducing heat transfer efficiency over time
• Copper braze corrosion when exposed to incompatible media such as ammonia or high-chloride water
• Freeze damage if a water-based circuit runs near 0 C without adequate antifreeze protection
• Thermal-cycling fatigue cracking after repeated rapid temperature swings

Inspection checklist

• External visual inspection for leakage at brazed joints and pipe connections
• Pressure/leak test at the class-required interval
• Performance check - inlet/outlet temperatures and pressure drop trended against design
• Insulation and support/bracket condition
• Connection flange and pipe joint tightness
• External corrosion check on frame and connection points
• Approach-temperature trend compared against commissioning baseline

Service intervals

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Complete replacement unit - brazed plate exchangers are not field re-plateable like gasketed types
• Connection gaskets/O-rings at pipe joints
• Mounting brackets and fasteners

Safety

• Never exceed the rated design pressure (33 bar) or design temperature - confirm relief protection is fitted on both circuits
• Risk of cross-contamination between circuits if an internal leak develops, e.g. oil into cooling water
• Copper brazing is not compatible with ammonia or high-chloride media - verify media compatibility before putting the unit into a new service
• Hot surface/scald risk on the high-temperature side during inspection

Class survey

Likely falls under class pressure-vessel/heat-exchanger rules where fitted in essential systems; surveyors typically want pressure test certificates, evidence of periodic leak/performance checks, and confirmation that design pressure and temperature match the actual service duty, particularly where the unit is in a fuel, lube oil or cooling water system serving classed machinery.

Estimated lifetime: Brazed plate heat exchangers are usually life-rated in years rather than running hours for continuous marine service, commonly on the order of 10-15+ years depending heavily on media compatibility and fouling - confirm against Alfa Laval's stated design life for the CB14 range.