NOW FOR USA HTS Harmonized Tariff Schedule (2022 Revision 8)
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Harmonized Tariff Schedule (2022 Revision 8)

Heading Duty(general) Duty(china) Article Description
8401     Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation; parts thereof:
8401.10.00.00 3.3%  The duty provided in the applicable subheading plus 25%  Nuclear reactors
8401.20.00.00 2.6%  The duty provided in the applicable subheading plus 25%  Machinery and apparatus for isotopic separation, and parts thereof
8401.30.00.00 3.3%  The duty provided in the applicable subheading plus 25%  Fuel elements (cartridges), non-irradiated, and parts thereof
8401.40.00.00 3.3%  The duty provided in the applicable subheading plus 25%  Parts of nuclear reactors
8402     Steam or other vapor generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers; parts thereof:
Steam or other vapor generating boilers:
8402.11.00.00 5.2%  The duty provided in the applicable subheading plus 25%  Watertube boilers with a steam production exceeding 45 t per hour
8402.12.00.00 4.3%  The duty provided in the applicable subheading plus 25%  Watertube boilers with a steam production not exceeding 45 t per hour
8402.19.00.00 5.2%  The duty provided in the applicable subheading plus 25%  Other vapor generating boilers, including hybrid boilers
8402.20.00.00 3.3%  The duty provided in the applicable subheading plus 25%  Super-heated water boilers
8402.90.00 4.3%  The duty provided in the applicable subheading plus 25%  Parts
8402.90.00.10 4.3%  The duty provided in the applicable subheading plus 25%  Heat exchangers
8402.90.00.90 4.3%  The duty provided in the applicable subheading plus 25%  Other
8403     Central heating boilers (other than those of heading 8402) and parts thereof:
8403.10.00.00 Free  The duty provided in the applicable subheading + 7.5%  Boilers
8403.90.00.00 Free  The duty provided in the applicable subheading + 7.5%  Parts
8404     Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapor power units; parts thereof:
8404.10.00 3.5%  The duty provided in the applicable subheading + 25%  Auxiliary plant for use with boilers of heading 8402 or 8403
8404.10.00.10 3.5%  The duty provided in the applicable subheading + 25%  Economizers
8404.10.00.50 3.5%  The duty provided in the applicable subheading + 25%  Other