Sourcing boiler tube bundles from China

Zero duty for boiler parts

Heading 8402 covers steam or other vapour generating boilers, superheated water boilers and their parts. For a replacement bundle supplied as a boiler part, the relevant line to investigate is 8402 90 00 00. The complete-boiler rows are classification comparisons, not alternative codes for the same bundle.

Read from the UK Trade Tariff on 1 October 2026, every supplied line carried 0% duty for goods from China. No anti-dumping or countervailing duty, suspension or attached import control was recorded. Import VAT is normally 20%; see UK import duty and VAT.

Confirm the commodity code using the drawing, supplied condition and intended boiler application. Describe the bundle precisely rather than declaring it simply as steel tubes. For the wider product family, see fire-tube steam boilers.

Specify the bundle against the existing boiler

Send the boiler identification, original drawing and a measured interface drawing. Specify tube material, outside diameter, wall thickness, length, tube count, pitch and layout; tubeplate material and thickness; joint method; supports; and installation clearances. Identify whether tubeplates and mounting parts are included. Agree operating conditions, dimensional tolerances and the test plan before fabrication.

For supply into Great Britain, official guidance allows spare parts to comply with the conformity assessment requirements applicable when the original product or system was placed on the market. Intended spare-part use should be evidenced by documents available to market surveillance authorities on request. Record the target boiler and replacement purpose, and agree the applicable conformity requirements before ordering.

Worked duty example

Illustrative example, not a quote: One replacement steam boiler tube bundle; illustrative values 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

Fit: compare tubeplate outline, hole pattern, tube projection, supports and mounting interfaces with the approved drawing. Repeat accessible measurements on arrival before installation.

Materials: match tube and tubeplate identification to material certificates and production records. Check that substitutions were agreed and that traceability survives cutting and assembly.

Joints: inspect tube ends and tube-to-tubeplate joints for damage and visible defects. Review agreed weld examination and leak or pressure-test records against the actual bundle.

Packing: check bracing, protected tube ends, dry surfaces and lifting arrangements. On arrival, photograph bent tubes, corrosion and impact damage before unpacking further. Agree the inspection stages using quality inspection explained.

What goes wrong

A bundle can match the boiler model name but miss the actual tubeplate pattern or installation clearance. Other failures include substituted material, distorted tubeplates, damaged tube ends, leaking joints and test records for a different assembly. Resolve discrepancies against the agreed drawing and inspection records before fitting.

HSE says pressure-system users must provide safe, suitable equipment and ensure repairs are carried out properly. Have the repair contractor and competent person review the replacement plan and examination arrangements before returning the boiler to service; a factory test alone does not establish suitability for the installed system.

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.