Sourcing fused-quartz bell jars from China
Fused-quartz bell jars correctly classified in heading 7020 carry 0% UK duty from China, with no recorded trade remedy. Confirm classification from the actual use and demonstrate applicable product safety compliance before sale. Specify the sealing rim and operating conditions. Cambridge China Bridge sources fused-quartz bell jars.
Duty and classification for quartz bell jars
Read from the UK Trade Tariff on 1 October 2026, heading 7020 covers other articles of glass. Fused-quartz bell jars falling within its residual fused-quartz line are candidates for 7020 00 10 90. Laboratory glassware has its own heading, so material alone does not settle classification. The table shows bell-jar variants under the same candidate line, rather than separate tariff subdivisions.
The supplied tariff record shows 0% duty for goods from China and no anti-dumping duty, countervailing duty or suspension for this line. It attaches cat and dog fur import and export controls. Imports and exports of that fur and products made from it are banned, including supplies from China. Ask your customs broker to confirm the declaration requirement for the actual goods.
Give your broker the drawing, material certificate and intended function, using the commodity code guide. Import VAT is separate from customs duty; see UK import duty and VAT. For the wider heading context, see fused-quartz furnace tubes.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Fused-quartz bell jars with a ground sealing rim | 7020 00 10 90 | 0% | None |
Specify the quartz, sealing rim and operating conditions
Specify fused quartz, purity, hydroxyl content, transparency, internal clearance, overall height, wall thickness and rim geometry. Define flange dimensions, sealing-face flatness and finish, port positions and any welded joints. Match the drawing to the actual base and seal. Request a material certificate linked to the production batch and agree acceptable bubbles, inclusions and surface marks.
State whether the jar is a process cover or will operate under vacuum, together with temperature, pressure differential, cleaning chemicals and thermal cycling. Ask for test evidence covering the supplied design and written handling, inspection and operating instructions. Where more specific product safety law does not apply, workplace articles fall under the general workplace supply provisions. Work equipment needs adequate information for safe use and maintenance. Demonstrate applicable product safety compliance before sale.
Worked duty example
Illustrative example, not a quote: 10 fused-quartz bell jars with ground sealing rims, illustrative order under 7020 00 10 90, invoiced at £15,000 free on board, with £1,200 of freight and insurance to the UK. The customs value is £16,200. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £16,200, so it is £3,240. 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 the batch certificate to the order, check purity and hydroxyl evidence where relevant, and inspect the dome and walls for bubbles, inclusions and cracks.
Fit: measure height, clearance, wall thickness, rim and port positions against the drawing. Check sealing-face flatness, edge condition and fit on the intended base.
Service checks: review residual-stress and thermal-cycle results against the agreed method. For vacuum use, review the design-specific test record and agreed leak-test results, including welded ports.
Packing and arrival: check individual cushioning, rim protection and clearance between glass and crate fixings. Photograph chips, scratches and breakage before repacking. Record findings through the inspection guide.
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What goes wrong
A bell jar can match the nominal diameter yet fail to seal because the rim is uneven, chipped or incompatible with the base. Wall thickness can vary around the dome, and welded ports can introduce local stress. Compare production samples with the drawing and approved sample, including the sealing face and joints.
A purity certificate does not establish suitability for the intended vacuum or thermal cycle. Bubbles, inclusions and residual stress can undermine service performance. Packing that bears directly on the sealing rim can damage it while leaving the outer crate intact. Separate damaged jars for assessment before acceptance or use.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For own-brand ranges, see sourcing for brands.
Frequently asked questions
What is the UK import duty on fused-quartz bell jars from China?
For bell jars correctly classified under 7020 00 10 90, the supplied tariff record shows 0% duty, with no anti-dumping duty, countervailing duty or suspension. Import VAT is separate.
Are all quartz bell jars classified under heading 7020?
Do not assume so. Laboratory glassware has its own heading. Give your customs broker the material, drawing and intended function before confirming the code.
What evidence should I request for vacuum use?
Request evidence for the supplied design and intended pressure differential, temperature and thermal cycling, plus handling and inspection instructions. Agree leak testing and acceptance criteria before ordering.
How should fused-quartz bell jars be packed?
Agree individual cushioning and protection for the sealing rim and ports. Keep glass clear of crate fixings, assess the packed sample and inspect for chips, scratches and cracks on arrival.