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IMPORT PROCEDURE GUIDE FOR PRESSURE VESSELS
A pressure vessel is not a generic steel tank. If the importer only declares “pressure tank”, “air receiver” or “industrial vessel” without locking design pressure, working pressure, capacity, medium, material, manufacturing standard, nameplate, certificates and new/used condition, the shipment may face HS queries, technical dossier requests, C/O rejection, specialized safety questions or DEM/DET due to late document correction. This guide gives an E2E review map before ETA, covering HS code, duty, C/O, specialized policy, dossier set, customs workflow and key risks to block before arrival.
QUICK FACTS
| Item | Quick review content |
|---|---|
| Product | Independent industrial pressure vessel: air receiver, pressure tank, accumulator, separator vessel, surge tank or vessel for compressed air, water, oil, steam condensate or other industrial media. |
| Key policy threshold | Review carefully where rated working pressure is higher than 0.7 bar, excluding hydrostatic pressure, or where the goods fall under equipment subject to strict occupational safety requirements. |
| Reference HS | Depending on product nature: 7309.00.99, 7310.29.99, 7311.00.99, 8419.50.91, 8419.89.19 or another code where the vessel is part of boilers, thermal equipment or refrigeration systems. |
| Reference duties | Common MFN references: 0% for some containers under 7311, 5% for 7309.00.99, 10% for 7310.29.99, 3% or 0% for selected 8419 equipment; standard VAT 10%. |
| Key compliance point | Do not conclude “no permit / no inspection” without reviewing the file. Pressure vessels may require technical dossiers, safety inspection before use and declaration of use with the local Department of Home Affairs where applicable. |
| Caution | Do not apply this guide to boilers, thermal oil heaters, gas tanks/cylinders, refrigeration systems, steam/hot-water/gas piping, LPG cylinders or explosion-proof equipment without separate review. |
Legal note: This article applies only to pressure vessels. If the goods are boilers, gas cylinders, refrigeration assemblies, pressure piping, LPG containers or vessels fully integrated into a machine, review HS code and specialized policy again based on the actual dossier.
SCOPE OF APPLICATION
This guide covers independent pressure vessels imported for factory installation, replacement, industrial utilities, compressed-air stations, process lines, MEP projects or industrial resale. The review should cover vessel body, heads, nozzles, flanges, safety valve, pressure gauge, supports, accessories and the manufacturer’s technical dossier.
- New, used, refurbished, warranty, sample and project cargo may trigger different requirements.
- If electrical cabinets, sensors, solenoid valves, motors, pumps, compressors or refrigeration assemblies are imported together, review them separately.
- Oversized/overweight pressure vessels require packing, lifting, lashing, OOG/Flat Rack/Open Top and inland transport planning.
- Where data is insufficient, record: Review is required based on catalogue, datasheet, model and actual import purpose.
CLASSIFICATION & TECHNICAL IDENTIFICATION
Classification must be based on the technical nature of the vessel, not on marketing names. Key data include design pressure, working pressure, hydrostatic test pressure, capacity, medium, material, wall thickness, manufacturing standard, year of manufacture, serial number, nameplate, safety valve and factory inspection documents.
| Checkpoint | Documents to review | Risk if described incorrectly | Suggested customs/commercial description |
|---|---|---|---|
| Pressure rating | Datasheet, nameplate, drawing, certificate | Failure to identify occupational safety scope or applicable QCVN | Pressure vessel / air receiver, design pressure … bar, working pressure … bar |
| Capacity and dimensions | Catalogue, GA drawing, packing list | Wrong HS between 7309/7310/7311 and wrong transport plan | Capacity … L/m³, dimension …, net/gross weight … |
| Medium contained | Specification, P&ID, user manual | Confusion between gas container and ordinary liquid tank | For compressed air/nitrogen/water/oil/steam condensate… |
| Material and manufacturing standard | Material certificate, ASME/EN/JIS/TCVN documents, welding record | Insufficient basis for safety inspection after import | Carbon steel/stainless steel, standard ASME VIII/EN 13445/TCVN… |
| Condition | Invoice, photos, serial, year of manufacture | Used/refurbished goods may trigger used machinery policy | Brand new / used / refurbished pressure vessel; year … |
| Accessories | Packing list, accessory list, photos | Safety valves, sensors or electrical parts may trigger separate HS/policy | With safety valve, pressure gauge, no electrical control unless stated |
HS CODE – DUTY – C/O
HS code depends on whether the goods are containers for compressed/liquefied gas, ordinary tanks, small containers, heat exchangers, process equipment or parts of a larger system. Do not use one HS code for every pressure vessel.
| Reference HS code | Application condition | Risk if incorrect | Documents to review |
|---|---|---|---|
| 7311.00.99 | Iron/steel containers for compressed or liquefied gas, other type; may apply to air receivers or industrial gas pressure containers where appropriate | Wrong policy and duty if the goods are actually tanks, heat exchangers or gas cylinders under another line | Nameplate, pressure rating, medium, drawing, catalogue, packing list |
| 7309.00.99 | Iron/steel tanks/vats over 300 liters, not for compressed/liquefied gas and not fitted with mechanical/thermal equipment | Incorrect if the vessel contains compressed gas or has mechanical/thermal equipment | Capacity, medium, structure, photos, drawing |
| 7310.29.99 | Iron/steel containers not exceeding 300 liters, other type, where not classified in 7311 or machinery headings | Incorrect if it is a gas cylinder or specialized equipment | Capacity, use purpose, material, pressure data |
| 8419.50.91 / 8419.50.99 | Where the vessel is in fact a heat exchanger | Wrong if it is merely a pressure container | P&ID, thermal duty, heat exchange surface, drawing |
| 8419.89.19 / 8419.89.99 | Equipment for treatment of materials by change of temperature where applicable | Wrong if the item only stores pressure | Function description, process flow, datasheet |
| Other code by main equipment | Where the vessel is part of boilers, refrigeration systems, compressors or production lines | Splitting/combining parts incorrectly may affect policy | Contract, BOM, system drawing, spare part list |
REFERENCE DUTY TABLE
| HS / scenario | Reference MFN import duty | Reference ordinary duty | VAT | FTA preference with valid C/O | Application note |
|---|---|---|---|---|---|
| 7311.00.99 | 0% | Check the ordinary tariff line at declaration date; some references show 5% | 10% | May be 0% under many FTAs if C/O is valid | Separate pressure vessels from gas cylinders/tanks where policy differs |
| 7309.00.99 | 5% | 7.5% reference where 150% MFN principle applies | 10% | May be 0% or staged by FTA | Only where not for compressed/liquefied gas and no mechanical/thermal equipment |
| 7310.29.99 | 10% | 15% reference | 10% | FTA rate if eligible | Check capacity and technical nature |
| 8419.50.91 | 3% | 4.5% reference | 10% | FTA rate if eligible | Only for heat exchangers |
| 8419.89.19 | 0% | Check specific ordinary duty at declaration date | 10% | FTA rate if eligible | Only where the main function is thermal treatment |
Duty note: The figures are for planning only. Verify the tariff, FTA schedule, C/O form, origin criteria, direct transport and goods description at the customs declaration date.
APPLICABLE SPECIALIZED POLICY
| Goods scenario | Possible policy | Documents to check | Authority / portal if identifiable | Recommended timing | Risk note |
|---|---|---|---|---|---|
| Pressure vessel with working pressure > 0.7 bar | Strict occupational safety equipment; QCVN 01:2008/BLDTBXH; TCVN 8366:2010 | Datasheet, drawing, nameplate, certificates, welding and pressure test records | Safety authority / Department of Home Affairs for declaration of use; designated inspection body for safety inspection | Before ETA and before use | Missing technical file may block post-import inspection/use |
| Pressure vessels in Section II of Circular 01/2021 | May not be subject to state quality inspection at import, but QCVN and safety inspection obligations still need review | HS, pressure, capacity, TCVN 8366 classification | Customs; safety authority after clearance | Before declaration | Do not treat this as exemption from all safety duties |
| Gas cylinder/gas tank/LPG vessel | May trigger different quality inspection or gas container policy | Gas type, cylinder standard, valve, volume, pressure | Specialized authority by HS and goods nature | Before booking | Move to gas tank/cylinder review if applicable |
| Used/refurbished goods | Used machinery policy under Decision 18/2019 and Decision 28/2022 where applicable | Year, condition report, inspection certificate, remaining life | Customs; inspection body if required | Before contract | Risk of failing age/standard requirements |
| Vessel with electrical/control/refrigeration parts | Possible electrical, energy, conformity or refrigeration policies | BOM, circuit diagram, catalogue, accessory list | Customs and specialized ministry depending on equipment | Before ETA | Accessories may change HS/policy |
| Project/OOG cargo | Lifting, lashing, insurance, special transport planning | Packing drawing, lifting point, dimensions, weight | Forwarder, port, carrier, inland trucker | Before ETD | Incorrect dimensions/weight create cost and delay risk |
LEGAL DOCUMENTS TO REVIEW
| Document group | Document name/number | Issuing authority | Effective timing | Role in procedure | Key points | Review note |
|---|---|---|---|---|---|---|
| Law | Law on Occupational Safety and Hygiene 84/2015/QH13 | National Assembly | Effective from 01 Jul 2016 | Framework for strict safety equipment, inspection and use declaration | Safety inspection and user obligations | Check amendments/guidance |
| Decree | Decree 44/2016/ND-CP | Government | Effective 01 Jul 2016 | Technical safety inspection, OSH training and working environment monitoring | Inspection of strict safety equipment | Check Decree 4/2023 where relevant |
| Current management structure | Decree 25/2025/ND-CP; Decision 120/QD-BNV of 2025 | Government / Ministry of Home Affairs | Applies under the 2025 organizational structure | Identifies the current focal agency for occupational safety and health administration | The Department of Employment under the Ministry of Home Affairs performs occupational safety management functions | Keep MOLISA names for original instruments, but check current procedures with Ministry/Department of Home Affairs agencies |
| Circular | Circular 36/2019/TT-BLDTBXH | MOLISA | Effective from 01 Mar 2020 | Lists pressure vessels with rated working pressure above 0.7 bar | Section I list | From 01 Mar 2025, occupational safety management functions are under the Ministry of Home Affairs / Department of Employment; original legal instruments remain issued by MOLISA |
| Circular | Circular 01/2021/TT-BLDTBXH | MOLISA | Effective 18 Jul 2021 | Group-2 products and import quality inspection measures | Article 4 and Sections I/II of appendix | Pressure vessels may be in the non-import-quality-inspection section; however conformity certification/declaration and safety inspection before use remain critical |
| QCVN | QCVN 01:2008/BLDTBXH under Decision 64/2008/QD-BLDTBXH | MOLISA | Issued 27 Nov 2008 | Safety regulation for boilers and pressure vessels | Scope and 0.7 bar threshold | Apply only where product falls within scope |
| Standard | TCVN 8366:2010 Pressure vessels – design and manufacture requirements | Vietnam standard system | Check current standard status | Technical basis for design/manufacturing review | Pressure, materials, manufacturing and testing | Compare with ASME/EN/JIS standards if used by manufacturer |
| Used machinery | Decision 18/2019/QD-TTg and Decision 28/2022/QD-TTg | Prime Minister | Decision 28 effective 01 Mar 2023 | Used machinery import control | Age/standard/inspection conditions | Only if goods are used/refurbished |
| Operational guidance | Dispatch 322/ATLD-QCKD of 2023 | Department of Occupational Safety | Issued in 2023 | Guidance on quality inspection registration for pressure vessels/air receivers | Indicates no state quality inspection at import under Section II of Circular 01/2021, but conformity certification and declaration are required before use | Use as operational guidance; actual dossiers and current regulations must still be reviewed |
| Tariff | Decree 26/2023/ND-CP; Decree 199/2025/ND-CP and amendments | Government | Decree 26 effective 15 Jul 2023; Decree 199 effective 08 Jul 2025 | MFN tariff basis | Chapters 73 and 84 | Check at declaration date |
VIEW / DOWNLOAD ORIGINAL LEGAL TEXTS
QCVN 01:2008/BLDTBXHDecree 44/2016/ND-CPCircular 01/2021/TT-BLDTBXHCircular 36/2019/TT-BLDTBXHUse declaration portalDecree 26/2023/ND-CPDecree 199/2025/ND-CP
Enterprises should cross-check the documents on official legal portals or issuing authority websites before applying them.
CUSTOMS CLEARANCE DOCUMENT SET
Commercial documents
- Commercial Invoice
- Packing List
- Bill of Lading / Air Waybill
- Sales Contract / Purchase Order
- C/O if claiming preferential duty
- Product photos, original label and nameplate
Technical dossier
- Catalogue / datasheet
- GA/detail drawing
- Material and welding certificates
- Hydrostatic / pneumatic test report
- Factory inspection certificate / COC / CQ
- User and installation manuals
Specialized dossier if any
- Safety inspection plan before use
- Use declaration dossier
- Used machinery dossier if any
- OOG transport dossier if oversized
- Label/nameplate dossier
| File group | Required documents | Used for | Usually prepared by | Common error | Pre-ETA check |
|---|---|---|---|---|---|
| Commercial | Invoice, Packing List, Contract/PO | Customs value, quantity and trade terms | Importer/Docs/Sales | Generic goods name; missing pressure/capacity/model | Match description with catalogue/nameplate |
| Transport | B/L/AWB, arrival notice, pre-alert | Manifest, delivery order, ETA tracking | Forwarder/Carrier | Wrong dimensions/weight or missing OOG data | Approve draft transport documents |
| Technical | Datasheet, drawing, certificates, test reports | HS, policy and post-import inspection | Supplier/Engineering/QA | No pressure, capacity or manufacturing standard | Request full technical pack before ETD |
| HS–tax–C/O | HS memo, draft C/O, catalogue, label | Duty and FTA review | Compliance/Broker | C/O HS/description mismatch | Check draft C/O after HS finalization |
| OSH safety | QCVN/TCVN mapping, inspection/use declaration plan | Safety inspection and use declaration | Importer/HSE/Engineering | Discovering missing inspection documents after clearance | Prepare inspection checklist before arrival |
Control principle: Goods name, quantity, model, serial, pressure, capacity, material, origin and technical standard must match across commercial documents, catalogue, nameplate, specialized dossier and customs declaration.
DECISION POINTS THAT MAY HOLD THE SHIPMENT
| Decision point | Question to answer | Evidence | Consequence if unclear | Recommended handling |
|---|---|---|---|---|
| HS basis | Is it 7309, 7310, 7311 or 8419? | Datasheet, drawing, pressure/capacity, purpose | HS query, duty adjustment or C/O issue | Prepare HS memo before ETA |
| Strict safety scope | Is working pressure above 0.7 bar? | Nameplate, certificate, QCVN/TCVN mapping | Safety dossier request or use delay | Review QCVN 01 and Circular 36 |
| Gas cylinder/tank nature | Is it for compressed or liquefied gas? | Medium, valve, cylinder standard | Wrong import quality policy | Separate gas container policy if applicable |
| New or used | Is it new, used or refurbished? | Invoice, photos, serial, inspection report | Used machinery policy risk | Confirm condition before contract |
| C/O validity | Does C/O match form, HS, description and origin? | Draft C/O, invoice, B/L/AWB | FTA preference denied | Check draft C/O after HS finalization |
| Post-import inspection file | Is the technical pack sufficient for safety inspection? | Datasheet, drawing, test report, certificates | Cannot put equipment into use on time | Obtain technical pack before shipment |
PRACTICAL E2E WORKFLOW
Pre-ETA review.
Finalize HS, duty, C/O, safety policy, new/used status, labels, transport plan and post-import inspection requirements.
Lock documents and technical files.
Finalize Invoice, Packing List, B/L/AWB, catalogue, datasheet, drawing, nameplate, model/serial list, certificates and test reports.
Prepare specialized dossiers if any.
If import quality inspection, used machinery review or other specialized requirements apply, prepare them before ETA. Even without import quality inspection, prepare safety inspection/use declaration documents.
Lodge customs declaration.
Green: conditional system clearance. Yellow: document check. Red: document and physical inspection. Common queries cover value, HS, pressure, capacity, nameplate, C/O and group-2 policy.
Clear, deliver, inspect and archive.
Deliver to warehouse/site, check serial/nameplate, arrange safety inspection before use, declare use where applicable and archive batch documents.
PRE-ETA RISK CHECKLIST
| Risk | Consequence | Pre-ETA prevention | Documents to check |
|---|---|---|---|
| Generic goods name | Wrong HS/policy and technical query | State vessel type, pressure, capacity and medium | Invoice, packing, catalogue, nameplate |
| Missing technical dossier | Weak HS explanation and failed post-import inspection | Request full technical pack before ETD | Datasheet, drawing, hydro test, COC/CQ |
| Confusing pressure vessel with gas cylinder | Wrong quality inspection policy | Identify medium, valve and product standard | Specification, valve list, cylinder standard |
| C/O mismatch | FTA preference denied | Check draft C/O after final HS | C/O, invoice, B/L/AWB |
| Used/refurbished not reviewed | Used machinery policy risk | Confirm condition and year of manufacture | Invoice, serial, photos, inspection report |
| OOG handling not planned | Booking failure and port/trucking cost | Review dimensions, weight and lifting points | Packing drawing, lifting drawing, route survey |
FAQ
| Question | Short answer |
|---|---|
| Does importing a pressure vessel require a permit? | Do not answer absolutely. Review HS, QCVN, strict safety scope, inspection/use declaration and new/used condition based on the dossier. |
| Is state quality inspection required at import? | Pressure vessels under Section II of Circular 01/2021 are generally not subject to state quality inspection at import, but conformity certification/declaration, technical safety inspection and use declaration must still be prepared before use. |
| Is conformity certification required? | For pressure vessels within the relevant scope, conformity certification/declaration may be required before use, together with technical safety inspection. Pressure, capacity, medium, manufacturing standard and use purpose are required for conclusion. |
| Is safety inspection required before use? | If the vessel is strict safety equipment, technical safety inspection before use and use declaration, usually within 30 days from putting the equipment into use, may be required. |
| Can C/O reduce duty? | Potentially, if C/O form, origin criterion, HS, goods description and direct transport are valid under the relevant FTA. |
| What if invoice model differs from nameplate? | Correct the documents before ETA. Model/serial/nameplate discrepancies often trigger customs or inspection questions. |
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