73079190 under HS Code TUBE OR PIPE FITTINGS (FOR EXAMPLE, COUPLINGS, ELBOWS, SLEEVES), OF IRON OR STEEL - OTHER : FLANGES : OTHER, 73079390 under HS Code TUBE OR PIPE FITTINGS (FOR EXAMPLE, COUPLINGS, ELBOWS, SLEEVES), OF IRON OR STEEL - OTHER : BUTT WELDING FITTINGS : OTHER, and 73043990 under HS Code Others were the top imported HS Codes by C.V. MELVINS in 2021.