Monoblock pumps , also known as screw pumps, are specialized equipment used in various industries, including oil and gas refining, chemical processing, food processing, and water treatment. Due to their unique design and the ability to convey viscous, solid and shear-sensitive liquids, these pumps occupy a special position in this sector. This article provides a comprehensive analysis of the customs codes for monobloc pumps in different countries and examines important aspects of international trade in this product.

Classification of individual pumps in GS systems
Single-stage pumps are generally classified according to Chapter 84 of the Harmonized System for Goods (HS Code), which regulates machinery and mechanical equipment. The main code for such pumps is usually Group 8413 (liquid pumps).
Technical features that affect the classification:
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Engine type (electric, hydraulic, pneumatic)
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Rotor and stator materials (steel and special rubber)
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Flow and working pressure
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Special applications (food industry, chemical industry, etc.)
Customs tariff numbers for individual pumps for the main industrialized countries
1. Iran
In Iran’s customs system, individual bombs are generally classified based on the following codes:
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84131900 : Other liquid positive displacement pumps (standard models)
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84138100 : Dosing pump or dosing pump (for precision models)
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84135000 : Piston pumps and diaphragm pumps (in some cases)
2. China
China as one of the largest producers:
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84131900 : Positive displacement rotary pumps (including standard single pumps)
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84135000 : High Precision Screw Pump
3. USA (HTS-System)
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8413190040 : Positive Displacement Rotary Pump
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8413500080 : Industrial Screw Pump
4. European Union (TARIC)
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84131900 : Positive Displacement Rotary Pump
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84135000 : Industrial Screw Pump
5. India
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84131920 : Screw pump
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84135020 : Chemical Pump
6. Turkey
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8413190000 : Piston pump
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8413500000 : Special Industrial Pump
7. Russia
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8413190009 : Rotary pump
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8413500009 : Screw pump
Customs tariffs in different countries
| Nation | Basic price | Preferential interest rates | describes |
|---|---|---|---|
| Iran | 15 % | 5% (in some countries) | A technology license is required. |
| Porcelain | 8 % | 5% (ASEAN countries) | — |
| USA | 3,7 % | 0% (in some countries) | UL Standards Required |
| European Union | 4,5 % | 0% (for EFTA countries) | Requirements of the CE standard |
| India | 10 % | 7.5% (for SAARC countries) | ISI logo required. |
| Russia | 12 % | 6.5% (EAEU countries) | GOST certificate required |
Documents required for customs clearance
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Public Documents :
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Invoice
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Waybill
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Certificate of origin
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Packing list
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Technical Documents :
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Technology Catalog
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Standard certificates (CE, UL, GOST, etc.)
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Full Technical Document
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Certificate for raw materials (for the food industry)
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Specific files :
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License from the Ministry of Industry (in some countries)
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Certificate of non-flammability (for the oil and gas industry)
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License for medical activities (food industry)
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Customs problems and solutions
Task 1: Differences in the definition of customs tariff numbers
Solution :
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Provision of complete technical documentation
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Please consult a customs expert before shipping.
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Take advantage of the advice of legal advisors on international trade
Problem 2: Differences in standards
Solution :
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The products comply with the standards of the country of destination.
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Obtain international certificates
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Work with a reputable inspection company.
Challenge 3: Sudden rule changes
Solution :
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Membership in industry associations
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Daily monitoring of customs regulations
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Use the services of a consulting company.
Future vision and development
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Technological development : The development of smart individual pumps may lead to the creation of new subcategories in the customs tariff.
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Trade development : New trade agreements may lead to adjustments in customs duties.
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Regulatory developments : Stricter environmental standards will have an impact on the customs clearance process.
The golden secret of successful trading
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Before you submit : your application
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Please check the customs tariff code of your destination country carefully.
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Check if any special permits are required.
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Calculate customs duties accurately
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During production :
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The products comply with the standards of the country of destination.
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Preparation of the complete technical documentation
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The packaging is suitable for international shipping.
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After the birth :
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Prepare a high-resolution file
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Working with a reputable customs broker
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Continuous monitoring of the unloading process
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Conclusion and final recommendations
Single-stage pumps are indispensable in many industries due to their unique characteristics, but complex customs regulations can lead to difficulties in international trade. You can mitigate these difficulties by following these recommendations:
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Determine customs duties accurately based on the actual technical characteristics of the product.
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Stay up to date with changes in customs laws in the countries of departure and destination.
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Preparation of complete documentation and compliance with the required standards
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Cooperation with consultants specialising in customs issues and international trade
By following these principles and using the information presented in this article, you can complete the import or export process of a single pump with minimal effort and maximum efficiency.

