GOST Standards & GOST Certificate of Conformity (Full English Version) 1. What are GOST Standards? 1.1 Basic Definition GOST = Государственный Стандарт (Gosudarstvennyy Standart) Literally: State Standard. Originated in the Soviet Union as unified technical specifications covering safety, mechanical performance, electrical parameters, climate resistance, chemical limits, measurement accuracy, labeling and test methods. After USSR dissolution, each country developed its own national GOST standard series with suffix codes: GOST R: Russian Federation national standards (main focus here) GOST-K: Kazakhstan national standards GOST-B: Belarus national standards 1.2 Structure of a GOST Standard Number Example: GOST 15150-69 GOST = standard family 15150 = serial code (climate environmental testing) 69 = year of issuance Common widely-used GOST R standards: GOST 60335 series: Household appliance safety GOST 30804 series: EMC electromagnetic compatibility GOST 15150-69: Cold/heat/humidity environmental test (-25℃ / -50℃ extreme cold grades) GOST R 50030: Low-voltage switchgear safety GOST R 51136: Construction material flame retardancy 1.3 Legal Hierarchy Rule (Critical 2026 Rule) TR CU (EAEU Technical Regulations) > GOST Standards If a product falls under any EAEU TR CU regulation (low voltage, machinery, toys, PPE, EMC), the unified union regulation overrides national GOST standards. Only EAC certification is accepted for customs clearance; GOST CoC alone is invalid. GOST R standards apply only to products without matching TR CU Special railway equipment, high-voltage gear above 1kV, special coatings, fertilizers, unique measuring instruments have no EAEU unified rules and must comply with dedicated GOST R national standards. GOST standards set the technical test benchmarks for issuing GOST Certificate of Conformity. All lab tests must follow the corresponding GOST standard clauses【详细】