Evidence-first editorial standard
This guide separates observed facts, engineering assumptions and data that still require confirmation. It does not promise a universal service life or replace the exact product data and project specification.
Treat these as three constructions, not three price levels
A hard lining places a rigid, high-hardness face between the material and the steel. A resilient lining absorbs and returns impact energy through an elastomer. A rubber-ceramic composite embeds hard elements in an elastomer carrier so that part of the surface resists cutting while the matrix accommodates deflection. Each answers a different dominant mechanism, and the cheapest of the three on a purchase order is frequently the most expensive over a campaign.
Hard linings suit sliding abrasion on a stable support
Where fine to medium particles slide along a wall that does not flex, a hard continuous face gives the longest path before the steel is exposed. The conditions that undermine it are not abrasive at all: repeated heavy impact, exposed edges, a shell that deflects under load, and thermal or mechanical movement that the joint pattern cannot absorb. Confirm the support before confirming the material.
Resilient linings suit repeated impact and noise-sensitive positions
An elastomer deforms under a strike and returns to shape, which spreads the load and can significantly reduce structure-borne noise. Its limits are sharp particles that cut rather than bounce, high surface temperature, certain hydrocarbons and solvents, and high-velocity fine erosion where a soft surface is quickly channelled. Rubber is not a weaker version of ceramic; it fails for entirely different reasons.
Composites are for mixed duty, not for hedging
A rubber-ceramic panel is the right answer where impact and abrasion genuinely coexist on the same surface, or where the substrate moves enough that a rigid lining would crack or debond. It is the wrong answer when one mechanism clearly dominates: against pure sliding abrasion a hard face lasts longer, and against pure heavy impact a dedicated impact construction absorbs more energy. Specifying a composite to avoid making the diagnosis usually costs more than making it.
Weight, attachment and installation often decide the outcome
A hard lining adds mass to the structure and needs a joint layout, transitions and a retention method. A resilient panel is lighter and can be mechanically fastened quickly, which matters when the outage is short or the position is overhead. A composite sits between the two. Check the structure's capacity, the available shutdown, whether hot work is permitted and how a damaged section will be replaced before comparing wear performance at all.
Decide by zone, then verify by measurement
Map the asset into sliding, impact and mixed zones rather than selecting one lining for the whole surface: a transfer chute commonly justifies a resilient or composite section at the drop point and a hard face over the sliding area. Record a baseline — dated photographs, reference locations, thickness readings where the shell allows — so the next decision is based on measured behaviour instead of a service-life figure nobody can audit.