73061910

Longitudinally electric resistance welded (ERW)

73061920

Spiral or helical submerged arc welded

73061990

Other

73062100

Casing and tubing of a kind used in drilling for oil or gas:Welded, of stainless steel

73062900

Other

730630

Other, welded, of circular cross-section, of iron or non-alloy steel:

73063010

Boiler tubes

73063020

Copper-plated, fluororesin-coated or zinc-chromated steel tubes with an external diameter not exceeding 15 mm

73063030

Pipe of a kind used to make sheath pipe (heater pipe) for heating elements of electric flat irons or rice cookers, with an external diameter not exceeding 12 mm

73063040

High-pressure pipe

73063090

Other

730640

Other, welded, of circular cross-section, of stainless steel: