Xylem Heat Exchanger 04036-BCF

Observe interior and exterior condition for scale build-up

Check for complete stoppage of flow through tubes due to neglect in cleaning

Is there a marked increase in pressure drop or reduction in performance?

Has the unit been checked for air or vapor binding?

Inspect for severe expansion strains, leaking tube joints, and damage to the heat exchanger

Clean exchangers subject to fouling or scaling periodically

Describe any light sludge or scale coating observed on the tubes

Open the vent connections and start to circulate the cold medium only.

Are the passages in the exchanger entirely filled with the cold fluid before closing the vents?

Introduce the hot medium gradually until all passages are filled with liquid, then close vents.

Is the unit slowly brought up to temperature?

Was the operation started gradually?

Ensure no hot fluid is admitted to the unit suddenly when empty or cold.

Ensure the unit is not shocked with cold fluid when hot.

Ensure compliance with design specifications

Shut off flow of hot medium first

Is it necessary to stop circulation of cooling medium?

Stop circulation of hot medium if cooling medium is stopped

Drain all fluids to prevent freezing and corrosion

Drain condensate from steam heaters to prevent water hammer

Ensure no pulsation of fluids to prevent vibration and strain

Ensure all pressure is off equipment and the unit is drained before opening heads

Inspect all tubes for erosion, corrosion, or foreign material and describe findings

Inspect all anodes for excessive corrosion or scale insulation

Scrape anodes to a bright surface if necessary

Inspect filters to prevent foreign matter from entering the exchanger

Ensure not to blow out heat exchangers with air when operating fluids are flammable or hazardous

Select cleaning method used for heat exchangers

Inspect for renewable anodes or pipe plugs

Check anodes for scale or surface coatings

Ensure pipe plug material is softer than the base part

Verify anodes are inhibiting electrolytic corrosion

Document any findings or issues