Tubes; parts of cathode-ray tubes

HS v2022 Code: 854091

About tubes; parts of cathode-ray tubes

HS code 854091 covers the import and export of tubes and parts of cathode-ray tubes. Cathode-ray tubes (CRTs) were once the dominant display technology for televisions and computer monitors, though they have largely been replaced by newer display technologies such as LCD and LED. Despite this, CRTs remain an important component in certain specialized applications, such as oscilloscopes and some industrial equipment. The global trade in CRT tubes and parts is a significant industry, with applications across a range of sectors including electronics, medical devices, and scientific instrumentation.

Production process

The production of CRT tubes and parts involves several key steps. First, the glass envelope of the CRT is formed, often through a molding or blowing process. The electron gun assembly, which generates and accelerates the electron beam, is then constructed and sealed into the glass envelope. The phosphor coating that produces the visible image is applied to the inside of the faceplate. Finally, the tube is evacuated and sealed, ready for use in the final product.

Production inputs

The main inputs required for the production of CRT tubes and parts include high-quality glass for the envelope, specialized electron gun components, phosphor materials, and various metals and ceramics for the internal structures. Sophisticated manufacturing equipment, such as vacuum chambers and precision assembly tools, are also essential inputs for this industry. Additionally, skilled technicians and engineers are required to design, assemble, and test the final products.

Production outputs

The primary output of this industry is CRT tubes and their component parts, which are then incorporated into a range of electronic devices and instruments. Some of the key consumers of CRT tubes and parts include 851220 Television receivers, 902780 Instruments and apparatus for physical or chemical analysis, and 901820 Ultraviolet or infrared ray apparatus. As newer display technologies continue to evolve, the demand for CRT-based products may decline, but there will likely remain a niche market for specialized applications that require the unique properties of CRT technology.

Revisions to 854091

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 854091. The most recent 1 version of this code (854091) is in the HS v2022 system (this version):

This page shows the most recent version of code 854091.

Family tree for tubes; parts of cathode-ray tubes

    graph LR
    A["<a href='/classifications/hs/v2022/85'>85: Electrical machinery and equipment and parts thereof; sound recorders and reproducers; television image and sound recorders and reproducers, parts and accessories of such articles</a>"]
A --> B["<a href='/classifications/hs/v2022/8540'>8540: Thermionic, cold cathode or photo-cathode valves and tubes (e.g. vacuum, vapour, gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray and television camera tubes)</a>"]
B --> C["<a href='/classifications/hs/v2022/854091'>854091: Tubes; parts of cathode-ray tubes</a>"]

    B --> D["<a href='/classifications/hs/v2022/854011'>854011: Tubes; cathode-ray television picture tubes, including video monitor cathode-ray tubes, colour</a>"]
B --> E["<a href='/classifications/hs/v2022/854012'>854012: Tubes; cathode-ray television picture tubes, including video monitor cathode-ray tubes, monochrome</a>"]
B --> F["<a href='/classifications/hs/v2022/854020'>854020: Tubes; television camera tubes, image converters and intensifiers, other photo-cathode tubes</a>"]
B --> G["<a href='/classifications/hs/v2022/854040'>854040: Tubes; data/graphic display tubes, monochrome; data/graphic display tubes, colour, with a phosphor dot screen pitch smaller than 0.4mm</a>"]
B --> H["<a href='/classifications/hs/v2022/854060'>854060: Tubes; cathode ray, n.e.c. in heading no. 8540</a>"]
B --> I["<a href='/classifications/hs/v2022/854071'>854071: Tubes; microwave, magnetrons, excluding grid-controlled tubes</a>"]
B --> J["<a href='/classifications/hs/v2022/854079'>854079: Tubes; microwave (for example klystrons, travelling wave tubes, carlinotrons), excluding magnetrons and grid-controlled tubes</a>"]
B --> K["<a href='/classifications/hs/v2022/854081'>854081: Valves and tubes; receiver or amplifier</a>"]
B --> L["<a href='/classifications/hs/v2022/854089'>854089: Valves and tubes; n.e.c. in heading no. 8540</a>"]
B --> M["<a href='/classifications/hs/v2022/854099'>854099: Valves and tubes; parts of the valves and tubes of heading no. 8540, excluding parts of cathode-ray tubes</a>"]

    

    %% Color coordination by level

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    classDef level2 color:#000,fill:#e0a458,stroke:#333,stroke-width:1px
    classDef level3 color:#000,fill:#419d78,stroke:#333,stroke-width:1px
    classDef level4 color:#000,fill:#c04abc,stroke:#333,stroke-width:1px
    classDef level5 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



  %% Apply classes
  class A level2
class B level4
class C level6
class D level6
class E level6
class F level6
class G level6
class H level6
class I level6
class J level6
class K level6
class L level6
class M level6

  class C highlight

  %% class A level1
  %% class B,C level2
  %% class D,E,F,G,H,I level2
  %% class J,K,L,M,N,O,P level3
  %% class C highlight