ADR tank codes

The ADR tank specification, decoded letter by letter: tank type, calculation pressure, openings and safety valves. These codes appear in Table A column 12; ADR sets them out in section 4.3.3.1.1, 4.3.4.1.1 of ADR 2025 (ECE/TRANS/352). 41 codes are in use, 0 reviewed. Each meaning below is a paraphrase in FreightUtils' own words, not the official text.