A Reproducible Screening Procedure for Hardfaced Sealing Surfaces of Wedge Gate Valves: An Sv-10Kh17T (ER430Ti) Case Study

Gate-valve repair decisions may rely on numerical and tribological datasets generated at different scales. Combining them can produce unsupported claims when wear results are reported only as ranges. This study introduces a reproducible screening procedure and demonstrates it with previously published results for Grade 20 steel with and without Sv-10Kh17T (ER430Ti) hardfacing. For each lower-is-better wear metric, an interval improvement factor was calculated from untreated and hardfaced ranges; strict dominance required the conservative lower bound to exceed unity. The tribological screen was combined with component-level stress and displacement ratios and an evidence-sufficiency grade. For dry contact, the improvement-factor intervals were 1.67–4.00 for mass loss and 1.60–4.00 for wear depth. In distilled water, the corresponding intervals were 1.50–5.00 and 1.25–4.00. For HOCUT 795 H-eu, both lower bounds equaled 1.00; thus, the range-only data did not establish strict dominance. The component-scale stress ratio after hardfacing was 0.895 for the water load case, 1.039 for steam, and 1.114 for petroleum products. The procedure classifies the hardfacing as eligible for validation under dry and aqueous laboratory conditions, but not as qualified for deployment because allowable-stress verification, mesh convergence, interface validation, and replicate-level wear statistics are unavailable. The rule separates reduced material removal from structural admissibility and service-life claims.

Hali tarjima qilinmagan