Conventional silica-containing ceramic packing should not automatically be used in hydrofluoric-acid service. HF can attack silica-containing ceramic phases even when the material performs extremely well in many other acids. Always identify fluoride content explicitly during material selection.

Acid-resistant ceramic packing is an effective choice for many corrosive and high-temperature packed towers, but its resistance is chemistry-specific. Proper selection requires checking chemical compatibility, temperature, physical properties and mechanical installation conditions rather than relying on the ceramic label alone.

The as-built baseline for tower internals should preserve final product identity, materials, geometry, tower interfaces, approved deviations, drawings, certificates, operating information, installation lessons, photographs, and links to the MDR for future replacement procurement.

Tower-internals contracts should distinguish factory inspection, shipment release, delivery/receiving acceptance, installation acceptance, and any operational performance acceptance instead of treating “acceptance” as one undefined event.

After delivery, shortages, manufacturing defects, transport damage, and site-handling damage should be investigated separately using package reconciliation, photographs, piece marks, inspection records, drawings, and shipment evidence before responsibility is assigned.