Sourcing steam boiler headers from China
Replacement steam boiler headers classified as boiler parts carry 0% UK duty from China, with no trade remedy shown in the supplied tariff snapshot. A separately supplied component may need its own conformity assessment and marking before sale in Great Britain. Cambridge China Bridge sources replacement steam boiler headers.
Zero duty for headers classified as boiler parts
Heading 8402 covers steam and other vapour-generating boilers, superheated water boilers and their parts. This guide concerns replacement headers forming part of a steam boiler. The table shows header variants sharing the same parts line, rather than separate tariff subdivisions. For wider heading context, see replacement boiler tube bundles.
Read from the UK Trade Tariff on 1 October 2026, code 8402 90 00 00 carried 0% duty for goods from China. The supplied snapshot lists no anti-dumping or countervailing duty, suspension or attached import control for this line. Import VAT is normally 20%; see UK import duty and VAT.
Send your customs broker the header drawing, its function, the boiler identification and the supply scope. Confirm that the shipment is a boiler part rather than separate steam-distribution pipework. Use the commodity-code guide before declaring the goods.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Replacement waterwall inlet header for a steam boiler | 8402 90 00 00 | 0% | None |
Specify the replacement header against the boiler drawing
Provide the original drawing and revision, material grade, design pressure and temperature, wall thickness, corrosion allowance and service history. Define branch positions, bore sizes, weld preparations, flange faces, drain connections, inspection openings and support locations. State whether tube stubs, end closures and lifting attachments are included. Use measured site dimensions to check the drawing before fabrication.
For supply into Great Britain, components may need individual conformity assessment and marking. Agree the applicable pressure-equipment route for the actual header, including whether it is supplied as a spare or a new component. Ask for the corresponding documents before shipment. Before the boiler returns to service, discuss the replacement with the competent person responsible for its written scheme of examination.
Worked duty example
Illustrative example, not a quote: One replacement superheater header for a steam boiler, illustrative only under 8402 90 00 00, invoiced at £28,000 free on board, with £4,000 of freight and insurance to the UK. The customs value is £32,000. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £32,000, so it is £6,400. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.
Inspection checklist
Material: match heat markings on the header and branches to the material certificates and agreed grade. Check that traceability survives machining, welding and surface treatment.
Dimensions: measure branch centres, orientation, overall length, wall thickness and weld preparations against the approved drawing. On arrival, check flange faces and tube stubs for transport damage.
Welds and tests: review the weld map, welding records, agreed non-destructive examination reports, heat-treatment records where specified and pressure-test results. Match each record to the delivered header.
Condition and records: inspect internal cleanliness, corrosion, protective caps and packing supports. Match identification to the drawing and applicable conformity documents. Plan these checks through quality inspection.
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What goes wrong
A header can match the overall length yet have branch centres or weld preparations that prevent installation. Other failure points include substituted material, missing heat traceability, weld defects and distorted branches. A pressure-test certificate alone does not show that the header matches the agreed material, geometry and fabrication records.
Keep the approved drawing revision in the purchase order and require written agreement before substitutions or connection changes. Compare factory measurements with site measurements before dispatch. A written scheme of examination is required for most pressure systems; factory inspection should be followed by the user's arrangements for examining the installed boiler.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For machinery and equipment, see machinery imports.
Frequently asked questions
What is the UK import duty on replacement steam boiler headers from China?
Headers classified as boiler parts under 8402 90 00 00 carry 0% duty in the supplied snapshot, with no anti-dumping or countervailing duty listed. Import VAT is normally 20%.
Does a replacement boiler header need CE or UKCA marking?
A separately supplied component may need individual conformity assessment and marking. Agree the applicable route for the actual header and its intended replacement use before ordering.
Can a factory make a replacement header from an old sample?
Use the sample to check geometry, alongside an approved drawing, material specification and operating conditions. Confirm branch positions and connection details against the installed boiler.
What documents should I request for a replacement boiler header?
Request the approved drawing, material certificates, weld map, welding and examination records, specified heat-treatment records and pressure-test report, plus conformity documents applicable to the supply.