73071110 under HS Code TUBE OR PIPE FITTINGS (FOR EXAMPLE, COUPLINGS, ELBOWS, SLEEVES), OF IRON OR STEEL - CAST FITTINGS : OF NON-MALLEABLE CAST IRON : SPONGE IRON CAST FITTINGS, 84798939 under HS Code Others, and 83079000 under HS Code FLEXIBLE TUBING OF BASE METAL, WITH OR WITHOUT FITTINGS OF OTHER BASE METAL were the top imported HS Codes by REFRIGERATION ELECTRICAL ENGINEERING TECHNOLOGY AND SERVICES JOINT STOCK COMPANY in 2021.