Case Studies
This application documents corrosion-protection work on carbon-steel, spiral-finned heat pipes used in an air-preheater assembly. The narrow spacing and large finned surface make preparation, rotation and spray access central to the application plan.
The documented exposure is moisture-bearing corrosive flue gas around carbon-steel finned tubes. Temperature values in the source are not reconciled, so no definitive project temperature is published here.
The application record focuses on coating access around closely spaced fins and on limiting the time between steel preparation and coating. It does not establish a public power-plant operator, operating result or service history.
A corrosion-protection requirement for the flue-gas-exposed heat pipes is documented. The record does not independently quantify corrosion loss or demonstrate particle-erosion damage to an installed coating.
Spiral fins increase the surface area and create narrow reverse-side zones. Preparation residue or incomplete spray access in those zones can interrupt continuity, so the tubes were handled in stages and rotated to expose each side for application and inspection.
The source describes moisture-bearing flue gas with acid-forming species. That supports a corrosive-exposure mechanism, but it is not a project-specific condensate chemistry measurement or a measured corrosion-rate result.
Prepare and cover the carbon-steel tube and fin surfaces continuously while keeping the completed geometry practical to inspect. This is an application objective, not a claim of verified service performance.
The source documents a corrosion-protection coating application but does not verify a current DAYU-X product model. Any present-day material selection must be reviewed against confirmed gas composition, moisture, temperature, steel condition and application access.
Remove oil, rust and scale from the carbon-steel heat pipes and blast the specified work surface to Sa 2.5. The source also describes local repair preparation; prepared surfaces should be cleaned before staged spraying begins.
Identify and arrange the finned tubes, complete blast preparation, remove residual dust, spray the accessible surfaces, rotate the tubes for the reverse side, and inspect coverage across the full fin geometry. No unreconciled coat count or thickness is presented as an as-built fact.
Protect the coated tubes from impact and contamination during handling. Release or installation should follow the selected system's approved curing instructions and a completed surface inspection; no commissioning result is claimed.
DY-13 is technically relevant to flue-gas corrosion review; this link does not identify the product used in the documented application. Selection depends on confirmed project conditions.
Inspection should confirm the prepared steel condition, cleanliness inside fin gaps, reverse-side coverage after rotation and a continuous visible finish. Exact dry-film thickness is omitted because the available source values conflict and no reconciled as-built record was found.
Future inspections should compare the same fin roots, tube surfaces and handling points for corrosion, contamination or local coating damage. No service interval or corrosion-reduction result is inferred from the application photographs.
The photographs show the spiral-finned heat pipes, preparation and coating stages. They do not establish a current product identity or an operational performance result.
Related industry
Closely spaced fins create reverse-side and root areas that can be missed unless tube position, spray angle and inspection are controlled.
No. The source supports moisture-bearing, acid-forming flue-gas exposure, but it does not provide a project-specific condensate analysis.
No. They document equipment and application stages; no readable current DAYU-X product identity is established.
The available records do not provide reconciled project values suitable for publication as definitive as-built conditions.
DAYU-X
Share the equipment, exposure and current damage so we can compare the relevant application direction.
