CPV code 50220000 designates Repair, maintenance and associated services related to railways and other equipment in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
50220000 sits under 50200000 (Repair, maintenance and associated services related to aircraft, railways, roads and marine equipment) and groups 6 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.