T13 · Trade opportunity evidence

China (CHN) to TWN (TWN) machinery: for filtering or purifying gases, other than intake air filters for internal combustion engines (HS6 842139)

A country-to-country view of reported machinery: for filtering or purifying gases, other than intake air filters for internal combustion engines trade, combining buyer demand, exporter position, market structure, access conditions, and observed lane history.

Explore HS 842139 in the workspace

Exporter China (CHN)Importer TWN (TWN)HS6 842139Two-way vertical tradeCoverage 1997-2024Accelerating

3-year buyer projection

$640.1MCalculated from reported demand

Exporter growth

+35%Full available history

Suppliers in market

58Latest reported count

Observed history

28 yearsLast year: 2024

Reported observations

What this machinery: for filtering or purifying gases, other than intake air filters for internal combustion engines lane shows for HS 842139

Core values for China (CHN) → TWN (TWN) in HS 842139.

Buyer market

Latest imports$530.3M

Five-year projection$725.7M

Buyer CAGR+6.5%

Latest annual change+15.5%

Exporter position

Latest exports$123.6M

Market share23.3%

Share change-3.1 pp

Best observed share23.3%

Market structure

Reported suppliers58

Concentration index1,385.5

Share gap+0 pp

SignalAccelerating

Detailed evidence

Complete lane evidence

Reported values, calculated indicators, and country-pair context for this route.

Measure	Value	What it describes
Buyer imports	$530.3M	TWN (TWN)'s latest reported imports
Exporter exports	$123.6M	China (CHN)'s exports to TWN (TWN)
Exporter market share	23.3%	Exporter share of the reported buyer market
Buyer five-year CAGR	+6.5%	Annualized change in buyer imports
Exporter full-history CAGR	+35%	Annualized change in exporter exports
Three-year buyer projection	$640.1M	Calculated projection from reported demand
Five-year buyer projection	$725.7M	Calculated projection from reported demand
Average buyer imports	$234.3M	Average reported importer value
Peak buyer imports	$641.7M	Highest reported importer value
Average exporter exports	$49.6M	Average reported lane exports
Peak exporter exports	$196.8M	Highest reported lane exports
Share change	-3.1 pp	Latest one-year change in exporter share
Reported suppliers	58	Supplier countries observed in the latest period
Buyer GDP	$610.9B	Latest buyer-country GDP estimate
Buyer GDP per person	$25.9K	Latest buyer-country GDP per person
Buyer population	23,596 thousand	Latest buyer-country population estimate
Buyer investment rate	Not reported	Reported buyer-country investment rate
Buyer secondary education	Not reported	Reported secondary education coverage
Distance	1,718 km	Approximate country-pair distance
Business entry time	Not reported days	Reported days to start a business
Shared legal system	No	Country-pair institutional relationship
Reported FTA	No	Reported trade-agreement indicator
WTO member	Yes	Buyer-country WTO membership indicator
Lane volatility	1.2	Variation indicator across observed lane values
Maximum drawdown	60.7%	Largest observed decline from a prior peak
Observed history	28 years	Coverage through 2024

Research reading

Machinery: for filtering or purifying gases, other than intake air filters for internal combustion engines demand and the China (CHN) to TWN (TWN) lane

TWN (TWN) reported $530.3M of machinery: for filtering or purifying gases, other than intake air filters for internal combustion engines imports in 2024. China (CHN) accounted for 23.3% of the observed market and reported $123.6M in exports on this lane.

The latest annual values eased slightly, while the longer available history shows +6.5% buyer growth and +35% exporter growth. The page separates reported values from projections and indicators.

Product classification

What does HS 842139 include?

HS 842139 covers Machinery: for filtering or purifying gases, other than intake air filters for internal combustion engines. This page studies the six-digit Harmonized System classification rather than a company, brand, retail category, or individual shipment.

The classification sits in HS chapter 84 and heading 8421. The recorded trade type is two-way vertical trade, with a low price range classification in the available product reference data.

How to interpret this page

Compare demand, position, and history together

This HS 842139 trade opportunity page brings together the buyer market in TWN (TWN), the exporter position of China (CHN), and the observed conditions of their trade lane. A large buyer market does not by itself show that every exporter has equal access, and a positive growth rate does not remove the need to examine volatility and historical coverage.

Use the reported imports and exports to understand scale, market share to understand position, projections to understand the calculated forward view, and lane history to understand how much evidence supports the comparison.

Frequently asked questions

Questions about China (CHN) to TWN (TWN) machinery: for filtering or purifying gases, other than intake air filters for internal combustion engines trade

What is the HS code for this product?

This page covers HS 842139, the six-digit product classification shown in the trade records.

How large is the TWN (TWN) market?

The page reports the latest buyer imports, historical averages, peaks, growth, and calculated projections for machinery: for filtering or purifying gases, other than intake air filters for internal combustion engines.

How strong is China (CHN) in this market?

Exporter performance is shown through lane exports, market share, share change, growth, and the number of reported suppliers.

What should be checked before entering this market?

Review market scale, competition, access indicators, volatility, drawdown, and the available history together rather than relying on one signal.

Definitions and coverage

How to read this page

Reported values

Trade values describe reported merchandise trade for the stated HS6 classification. They are not company-level sales or shipment records.

Calculated indicators

Growth, projections, concentration, volatility, and share-gap figures are calculated from the reported observations and should be interpreted with their coverage period.

Coverage

This sample covers 28 observed years through 2024. Missing values are shown as not reported rather than estimated.