Mixed-chemical service should be evaluated from the complete process composition, including impurities, reaction products, cleaning chemicals and upset conditions. Do not select ceramic packing using only the dominant chemical name.

Do not select ceramic tower packing from acid concentration alone. Always evaluate the specific acid, concentration range, operating temperature, impurities and process changes together before confirming material compatibility.

Ceramic packing surface area, void fraction and packing factor cannot by themselves determine tower pressure drop. Actual ΔP depends on gas velocity, liquid loading, fluid properties, bed height and bed condition. Catalogue values are inputs to hydraulic analysis, not substitutes for operating data.

Excessive ceramic packing warpage can alter openings, nesting tendency, local void fraction and bed hydraulics even when the material remains chemically resistant and mechanically strong. Quality inspection should therefore include geometry, not only laboratory material tests.

Ceramic random packing can show slightly different bulk density depending on loading and test method. Use controlled random loading, avoid deliberate compaction, and treat catalogue bulk density as representative rather than an exact immutable constant.