Rolling-stock components & parts
Oscillation dampers, suspension springs, brake shoes, brake triangles, couplings and components for 1520 mm gauge railways.
Geometric dimensions and visual surface inspection
Control of geometric dimensions and visual inspection of brake shoes, springs, oscillation dampers and couplings for drawing conformity per DSTU GOST 1452:2007, DSTU GOST 32880:2016 and GOST 30249-97.
Surface roughness
Measurement of surface roughness parameters of rolling-stock components per DSTU ISO 4287:2012, DSTU GOST 4686:2018 and GOST 9378-93.
Brinell and Rockwell hardness
Metal hardness testing by Brinell (DSTU EN ISO 6506-1:2019) and Rockwell (DSTU EN ISO 6508-1:2022, DSTU GOST 1452:2007) methods — mechanical properties control of brake shoes and springs.
Metal macro- and microstructure
Metallographic analysis of metal macro- and microstructure per DSTU EN ISO 643:2022, DSTU ISO 4969:2010 and DSTU GOST 32205:2016 to assess casting and heat-treatment quality.
Metal grade and chemical composition (spectral analysis)
Metal grade and chemical composition determination by spectral analysis per DSTU 2651:2005/GOST 380-2005 and DSTU 8918-8923:2019 — material conformity confirmation.
Hydraulic oscillation damper testing
Hydraulic oscillation damper testing for tightness, force characteristics and bench endurance per GOST 30635-99 (clauses 8.2, 8.4, 8.6, 8.7).
Suspension spring characteristics
Free-state height, deflection under load, permanent set and cyclic durability of springs per DSTU GOST 1452:2007 and DSTU GOST 32208:2016.
Brake shoe characteristics
Nominal mass, steel-back reliability, casting quality and structural strength of brake shoes per GOST 30249-97 and SOU MPP 45.060-258:2008.
Gear and elastic couplings
Torque and rotation speed of gear couplings per DSTU 2742-94 (GOST 5006-94) and critical torque of the elastic coupling per LNVC.01/ME-M:25 procedure.