73072900 under HS Code TUBE OR PIPE FITTINGS (FOR EXAMPLE, COUPLINGS, ELBOWS, SLEEVES), OF IRON OR STEEL - OTHER, OF STAINLESS STEEL : OTHER, 84818030 under HS Code TAPS, COCKS, VALVES AND SIMILAR APPLIANCES FOR PIPES, BOILER SHELLS, TANKS, VATS OR THE LIKE, INCLUDING PRESSURE-REDUCING VALVES AND THERMOSTATICALLY CONTROLLED VALVES - OTHER APPLIANCES: INDUSTRIAL VALVES (EXCLUDING PRESSURE-REDUCING VALVES, AND THERMOSTATICALLY CONTROLLED VALVES), and 73041110 under HS Code TUBES, PIPES AND HOLLOW PROFILES, SEAMLESS, OF IRON (OTHER THAN CAST IRON) OR STEEL - LINE PIPE OF A KIND USED FOR OIL OR GAS PIPELINES : -- OF STAINLESS STEEL: --- TUBES AND PIPES. were the top exported HS Codes by MET LOK VALVES AND FITTINGS in 2021.