What matters in the process
Review corrosion, erosion, product contamination, fabrication and inspection together. Small quantities of aggressive constituents can matter, as can solids abrasion and temperature excursions. The selected material must also be practical for the basket or bowl design. Linings and coatings introduce their own inspection, repair and compatibility questions rather than eliminating the need for an engineering review.
A practical example
A process may use a relatively mild feed but an aggressive cleaning solution at a higher temperature. Selecting only for the normal feed could overlook the limiting exposure. Prepare a table listing each fluid, concentration, temperature, exposure duration and cleaning frequency before requesting a material recommendation.
What to check or specify
- Provide complete chemical and cleaning-fluid analyses.
- State temperature ranges and exceptional conditions.
- Describe abrasion and product-contamination limits.
- Request material identification and inspection records.
Turn the result into a decision
Ask the supplier to state which parts contact the process and which grade or protection method applies to each. Verify any proposed change against the same fluid list. Where evidence is insufficient, agree a corrosion assessment or testing approach before finalizing the machine specification.
Equipment context: supplied HUADA English catalogue, PDF pages 11–12, 23–47. Numerical examples are illustrative calculations. Application guidance must be confirmed for the actual material and selected equipment.
