Sector guides

Sourcing cast-iron radiator sections from China

Replacement cast-iron radiator sections from China carry a flat 2% UK duty, with no trade remedy listed in the supplied record. For sections within the construction products regime, CE marking remains accepted in Great Britain. Cambridge China Bridge sources replacement cast-iron radiator sections.

Written by Bono Xu, Founder, Cambridge China Bridge · 4 min read · Updated 2026-10-15

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Duty on replacement cast-iron radiator sections

Heading 7322 covers non-electrically heated iron or steel central heating radiators and their parts, alongside certain air heaters and parts. Replacement cast-iron radiator sections fall within the cast-iron radiator and parts description. The table shows variants sharing the same tariff line. For complete assemblies, see cast-iron sectional radiators.

Read from the UK Trade Tariff on 30 September 2026, code 7322 11 00 00 carries 2% duty for goods from China. The supplied record lists no anti-dumping or countervailing duty, suspension, steel measure or attached import control for this line.

Confirm that the casting is a radiator section rather than a boiler section or a separately classified fitting. Give your customs broker the material, intended use, photographs and drawing when checking the commodity code.

UK duty on these lines for goods of Chinese origin (one code per row), read from the UK Trade Tariff on 30 September 2026.
GoodsCommodity codeDutyAnti-dumping or countervailing duty on China
Plain replacement cast-iron radiator sections7322 11 00 002%None

Match the existing cast-iron section

Use an existing section and a dimensioned drawing to specify height, depth, section pitch, column arrangement and joint centres. Record nipple thread size, pitch and handedness, sealing-face shape and gasket details. Specify whether the section is an intermediate or end piece, whether it has feet, and which openings are machined. A matching outline alone does not establish compatibility.

Agree the cast-iron grade, finish, operating conditions and pressure-test plan. Trial-assemble the sample with the intended nipples and gaskets before approving production. Have the installer assess compatibility with the existing radiator, including its condition and support arrangement.

For products within the construction products regime, CE marking remains accepted in Great Britain. Ask testing and certification to establish whether the separately supplied section is within scope and which documents cover it. Request heat-output evidence and a declaration of performance for any complete radiator you also buy; check that the documents identify the supplied configuration.

Worked duty example

Illustrative example, not a quote: Illustrative order of 50 replacement cast-iron radiator sections; values are illustrative, not a quotation under 7322 11 00 00, invoiced at £6,000 free on board, with £1,120 of freight and insurance to the UK. The customs value is £7,120. Duty at 2% is £142.40. Import VAT at 20% is charged on the customs value plus duty, £7,262.40, so it is £1,452.48. Import taxes total £1,594.88; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £142.40 of duty. The import duty and VAT guide explains each step.

Inspection checklist

Dimensions and joints: compare section pitch, joint centres, sealing faces and thread handedness with the approved drawing. Trial-fit production samples using the intended connecting components.

Casting and cleanliness: look for cracks, damaged edges and visible casting defects. Check water passages for retained sand, scale, oil and loose debris before assembly.

Pressure and finish: witness the agreed pressure test on a representative assembled sample and inspect the casting and section joints for leaks. Compare colour and surface texture with the approved sample.

Arrival and packing: check for broken feet, chipped decoration, exposed machined faces and rust beneath wrapping. Photograph damage and retain batch identification. Agree the inspection scope before shipment.

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What goes wrong

A replacement can resemble the original while having different joint centres, thread forms or sealing faces. Forcing the connection can damage the casting or leave a leaking joint. Approve a physical trial assembly, retain the accepted sample and require the factory to obtain approval before changing the pattern or machining.

Paint can conceal surface defects, and an isolated section test does not demonstrate that the assembled joints seal. Inspect accessible surfaces before coating and test the intended assembly. Separate sections in the packaging and protect feet, decoration and machined faces against impact.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.

Frequently asked questions

What is the UK import duty on replacement cast-iron radiator sections from China?

The supplied tariff record gives 2% duty under 7322 11 00 00, with no listed trade remedy, suspension or attached import control.

Will a Chinese replacement section fit an old cast-iron radiator?

Do not decide from photographs alone. Match section pitch, joint centres, nipple threads and sealing faces, then trial-assemble a sample with the intended nipples and gaskets.

Do replacement radiator sections need CE marking?

CE marking remains accepted for construction products in Great Britain. Have a testing adviser establish whether the loose section is within scope and which documents cover the supplied product.

How should replacement cast-iron radiator sections be tested?

Agree the test conditions with the factory and installer. Check casting condition and dimensions, trial-assemble the sections, and witness the agreed pressure test for casting and joint leaks.

Sources

  1. UK Trade Tariff — commodity codes and duty
  2. Construction Products Regulation in Great Britain

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