Product classification
HS code for Gas meter diaphragms: 9028.90
Meters, parts and accessories of gas, liquid, electricity supply or production meters, including calibrating meters thereof.
Classification of gas meter diaphragms under HS 9028.90
Gas meter diaphragms are classified under HS code 902890. This code is part of Chapter 90 and specifically falls under the category of parts and accessories for the meters described in heading 9028. Since gas meters themselves are classified under 902810, their components, such as diaphragms, housings, and internal mechanisms, are grouped under the parts subheading 902890. The diaphragm is a critical component in positive displacement gas meters, moving back and forth as gas flows to drive the counting mechanism. For a product to be classified here, it must be identifiable as being solely or principally for use with a gas, liquid, or electricity meter. This classification is essential for manufacturers and repair services importing specific components rather than whole units.
- Covers
- Flexible diaphragms for gas meters
- Internal measuring units for gas meters
- Gas meter casings and housings
- Recording mechanisms for supply meters
- Calibrating components for gas meters
- Also under 9028.90
- Itron meter modules
- Landis+Gyr meter covers
- Siemens meter communication cards
- Elster meter displays
- Honeywell meter sensors
Codes often confused with 9028.90
Common mistake. A common misclassification for gas meter diaphragms is HS code 401693, which covers gaskets, washers, and other seals of vulcanized rubber. If the diaphragm is made of rubber, it might be mistakenly placed there; however, because it is a specialized part of a meter, 902890 takes precedence. Another error is attempting to classify the part under the same code as the finished product (902810). Additionally, if the part is a general-purpose screw or bolt used in the meter, it would be classified according to its constituent material (e.g., Chapter 73 for steel) rather than as a meter part.
Top exporters and importers of HS 902890 (the code used for gas meter diaphragms), 2025
In 2025, the largest exporter of HS 902890 (the code used for gas meter diaphragms) in UN Comtrade data was China, with 22% of world exports; the largest importer in UN Comtrade data was the United States, with 27% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 902890, not only gas meter diaphragms.
Top exporters 2025 · share of world exports
- 1 China $724M 22% of world exports
- 2 Mexico $647M 20% of world exports
- 3 Vietnam* ~$460M 14% of world exports · partner records ↗
World total: $3.3B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $896M 27% of world imports
- 2 Mexico $465M 14% of world imports
- 3 Germany $206M 6.2% of world imports
World total: $3.3B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM codes for gas meter diaphragms
Brazil splits HS 9028.90 into 2 NCM codes. Pick the one that matches your product:
- 9028.90.10Parts and accessories of electricity meters
- 9028.90.90Parts and accessories of gas or liquid meters
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about gas meter diaphragms
What is the HS code for Gas meter diaphragms?
The HS code for Gas meter diaphragms is 902890 (Meters; parts and accessories of gas, liquid, electricity supply or production meters, including calibrating meters thereof). The HS code for gas meter diaphragms, as parts of a gas meter, is 902890.
How do I classify Gas meter diaphragms for customs?
Gas meter diaphragms is classified under HS code 902890 — Meters; parts and accessories of gas, liquid, electricity supply or production meters, including calibrating meters thereof. This is a 6-digit subheading level code.
Can general rubber seals be classified under 902890?
No, only parts that are specifically designed for use with meters of heading 9028 are classified here. General-purpose seals are classified under 4016.
Which countries are the top exporters of gas meter diaphragms (HS 902890)?
In 2025, the top exporters of HS 902890 (the code used for gas meter diaphragms) in UN Comtrade data were China ($724M, 22% of world exports), Mexico ($647M) and Vietnam (about $460M). World exports came to about $3.3B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of gas meter diaphragms (HS 902890)?
In 2025, the top importers of HS 902890 (the code used for gas meter diaphragms) in UN Comtrade data were the United States ($896M, 27% of world imports), Mexico ($465M) and Germany ($206M). World imports came to about $3.3B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Gas meter diaphragms the same in all countries?
The base HS code 902890 for Gas meter diaphragms is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for gas meter diaphragms in Brazil?
Brazil splits HS 902890 into 2 NCM codes, so the right one for gas meter diaphragms depends on the product's details: 9028.90.10 (Parts and accessories of electricity meters), 9028.90.90 (Parts and accessories of gas or liquid meters).