40091100 under HS Code TUBES, PIPES AND HOSES, OF VULCANISED RUBBER OTHER THAN HARD RUBBER, WITH OR WITHOUT THEIR FITTINGS (FOR EXAMPLE, JOINTS, ELBOWS, FLANGES) - NOT REINFORCED OR OTHERWISE COMBINED WITH OTHER MATERIALS : WITHOUT FITTINGS, 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 90261010 under HS Code INSTRUMENTS AND APPARATUS FOR MEASURING OR CHECKING THE FLOW, LEVEL, PRESSURE OR OTHER VARIABLES OF LIQUIDS OR GASES (FOR EXAMPLE, FLOW METERS, LEVEL GAUGES, MANOMETERS, HEAT METERS), EXCLUDING INSTRUMENTS AND APPARATUS OF HEADING 9014, 9015, 9028 OR 9032 - FOR MEASURING OR CHECKING THE FLOW OR LEVEL OF LIQUIDS: FLOW METERS. were the top exported HS Codes by K CHAKRABORTY in 2021.