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MACHINERY • THERMAL/PRESSURE EQUIPMENT • THERMAL OIL HEATER
IMPORT PROCEDURES FOR THERMAL OIL HEATERS
A thermal oil heater is a high-risk import item because it may involve Chapter 84 HS classification, strict occupational safety requirements and Group 2 list review if the actual goods match the list. Generic descriptions, missing P&ID/nameplate, wrong new/used status or no pre-ETA safety inspection file may trigger document supplementation, inspection channels, loss of C/O preference and installation delay. This article provides an E2E map for pre-shipment review.
QUICK FACT
| Item | Review content | Operational note |
|---|---|---|
| Commodity | Thermal oil heater / hot oil boiler used to heat heat-transfer oil for industrial production lines. | This article applies only to thermal oil heaters; it does not automatically cover steam boilers, standalone pressure vessels, gas tanks, refrigeration systems or pressure piping. |
| Reference HS | Prior review: 8419.89.19 if electrically heated; 8419.89.20 if not electrically operated; other headings may apply if construction/function differs. | Do not classify by trade name alone. Review drawings, operating principle, pressure/temperature data and accessories. |
| Reference duties | For 8419.89.19/8419.89.20: reference MFN 0%; ordinary duty and VAT 8%/10% must be reviewed according to the effective schedule/policy at declaration date. | If MFN is already 0%, C/O may not further reduce import duty but must still match origin records if FTA preference is used; VAT is not reduced by C/O alone. |
| Specialized policy | Falls under machinery/equipment with strict occupational safety requirements; whether import quality inspection under Group 2 applies must be checked separately against the actual HS/goods name. | Thermal oil heaters appear in the strict OSH equipment list; the key obligation is technical safety inspection before use. Do not automatically conclude import quality inspection is required unless the goods match the Group 2 import list. |
| Website category IDs | VI 2850 / EN 2890 / ZH 2892 | Final product category for machinery. |
Legal note: Review catalogue, datasheet, model, P&ID, nameplate, capacity, temperature, pressure, heat source, new/used status and actual import purpose. Customs clearance does not automatically permit operation if safety inspection or applicable conditions are not completed.
SCOPE OF APPLICATION
Applies to
Thermal oil heaters/hot oil boilers used to heat heat-transfer oil in factories and production lines.
Does not automatically apply to
Steam boilers, hot-water boilers, standalone pressure vessels, refrigeration systems, pressure piping, industrial furnaces or independent heat exchangers.
Requires separate review
Used equipment, complete lines, units with burner, control panel, pump skid, expansion tank, safety valve or detachable accessories.
Review according to catalogue, datasheet, model and actual import purpose.
CLASSIFICATION & TECHNICAL IDENTIFICATION
A thermal oil heater usually includes the heater body/heating chamber, coil/heat transfer tubes, burner or electric heating elements, thermal oil circulation pump, expansion tank, control panel, sensors, valves and safety protection system. Generic naming may cause wrong HS, specialized policy, safety inspection file and labeling errors.
TECHNICAL IDENTIFICATION CRITERIA
| Criteria | Documents to check | Risk if misdescribed | Suggested goods description |
|---|---|---|---|
| Heat source | Catalogue, datasheet, P&ID, general arrangement drawing | Confusion between electric heating, oil/gas burner or waste heat may distort HS/policy | Thermal oil heater, electrically heated / fuel-fired, model…, capacity… |
| Medium and temperature | Specification, manual, thermal oil circulation diagram | Unclear safety classification and inspection requirements | Thermal oil heater for heat transfer oil, max temperature… C |
| Pressure, volume, combustion chamber | Nameplate, test certificate, design document | Insufficient basis for safety inspection or Group 2 file if applicable | State pressure/design pressure if any, volume, heating capacity |
| Accessories | Packing List, BOM, actual photos | Pump, burner, control panel or expansion tank may require separate HS/policy review | Main heater with burner/control panel/pump set/accessories |
| Goods condition | Invoice, contract, photos, serial/year of manufacture | Used machinery may require Decision 18/2019 review and appraisal | New 100% / used machinery, year of manufacture… |
HS CODE – DUTY – C/O
This section separates HS classification from duties to avoid mixing product classification with tax obligations. The HS code should be finalized only after reviewing structure, heat source, main function, accessories and goods condition.
REFERENCE HS CODE TABLE
| Reference HS code | Applicability | Risk if misclassified | Documents to check |
|---|---|---|---|
| 8419.89.19 | Other electrically operated heating equipment for material treatment by temperature change; applicable when the thermal oil heater is an electrically heated industrial unit. | Confusion with industrial furnaces, steam boilers or heat exchangers if the product nature differs. | Catalogue, principle diagram, nameplate, electrical heating data, P&ID. |
| 8419.89.xx | Other thermal processing equipment with non-electric or different configuration; exact 8-digit code depends on actual structure. | Wrong declaration if fuel-fired, waste-heat-based or integrated line equipment is simplified. | Fuel/burner specs, flow diagram, datasheet, process description. |
| 8419.50.xx | Review only if the product is a heat exchanger rather than a complete thermal oil heater. | Misclassifying a heater as a heat exchanger may distort duty and safety policy. | Heat exchanger drawings, tube/shell specs, process function. |
| 8402.xx | Review only if the product is actually a steam/vapour generating boiler. | Wrong use of boiler heading if the equipment does not generate steam/vapour. | Steam generation data, pressure, capacity, boiler certificate. |
| 8417.xx | Review only if the product is an industrial furnace/oven directly treating materials in a chamber. | Confusion between indirect thermal oil heating and industrial furnace. | Furnace chamber, operating principle, product heating method. |
REFERENCE DUTY – VAT – C/O TABLE
8419.89.19 – other electrically heated equipment
- MFN
- 0%
- Ordinary duty
- 5%
- VAT
- Review 8%/10% at declaration date
- C/O/FTA
- Many FTAs may be 0% if C/O is valid
- Landed cost note
- Use for electrically heated thermal oil heater; still budget quality inspection, safety inspection, used-machinery appraisal and DEM/DET if documents are delayed.
8419.50.xx – heat exchanger if not a complete heater
- MFN
- Reference 3% for some heat exchanger codes
- Ordinary duty
- Generally determined by exact code and ordinary tariff rules
- VAT
- Review 8%/10%
- C/O/FTA
- May be 0% or lower than MFN depending on FTA
- Landed cost note
- Use only where the product nature is a heat exchanger; not a substitute for thermal oil heater compliance.
8402.xx – steam boiler if product nature differs
- MFN
- May be around 0%–3% depending on code
- Ordinary duty
- Check exact 8-digit code at declaration date
- VAT
- Generally review 10% or current policy
- C/O/FTA
- Depends on C/O, origin criteria and goods description
- Landed cost note
- Only where the equipment generates steam/vapour; safety policy may differ.
Used machinery / multi-module set
- MFN
- By HS of the main unit/components
- Ordinary duty
- By tariff at declaration date
- VAT
- By each code/product type
- C/O/FTA
- C/O must match description, model and components
- Landed cost note
- Budget used-machinery appraisal, Group 2 list review if applicable and safety inspection after installation.
C/O – FTA CHECK MATRIX
| C/O scenario | Import duty impact | Conditions to check | Risk |
|---|---|---|---|
| No C/O or invalid C/O | MFN or ordinary duty may apply | Form, signature, origin criterion, direct transport | No special preferential duty. |
| C/O from ASEAN/China/Korea/Japan/EU/CPTPP/RCEP | May reduce to 0% for many machinery codes if FTA rules are satisfied | HS, description, origin, PSR, third-party invoice if any | Mismatch in model or boiler/heater description may lead to rejection. |
| Multi-package equipment | C/O must cover the correct equipment set and accessories | Packing list, model list, serials, value breakdown | Missing model/serial complicates origin explanation. |
Landed cost note: For thermal oil heaters, landed cost includes more than import duty and VAT. Budget Group 2 list review if applicable, used-machinery appraisal, post-installation safety inspection, storage/DEM/DET if technical files are delayed and document correction cost if C/O/HS/description mismatch.
SPECIALIZED POLICY MATRIX
| Goods scenario | Potential policy | Documents to check | Authority/portal | Recommended timing | Risk note |
|---|---|---|---|---|---|
| New thermal oil heater | Strict OSH equipment list; import Group 2 review only if the actual goods match the list | Catalogue, datasheet, applicable QTKD/QCVN, factory certificate, test certificate | Quality inspection authority / designated inspection body / Customs | Before ETA and before installation | Do not assume exemption before reviewing HS, specs and Group 2 list. |
| Used machinery | Decision 18/2019/QD-TTg on used machinery import | Year of manufacture, condition, appraisal certificate, technical file | Appraisal body; Customs | Before purchase | Wrong age or missing certificate may block clearance. |
| High temperature/pressure equipment | Safety inspection before use under QTKD 02-2016/BLDTBXH and applicable standards | Nameplate, pressure data, manual, drawings, installation file | Technical safety inspection body | After installation, before operation | Customs clearance does not equal permission to operate. |
| Set includes burner, pump, control panel | Separate HS/policy may arise for burner, pump, control panel or safety valves | BOM, packing list, datasheet by component | Customs and specialized authorities if any | Before locking invoice/packing list | Generic description can distort HS and duty. |
| Imported for EPE/FDI/factory | Customs type, fixed asset treatment and workplace safety obligations | Contract, PO, use purpose, installation layout | Customs; local labor authority when operated | Before ETA | Customs type does not replace occupational safety obligations. |
LEGAL DOCUMENTS TO REVIEW
| Document group | Legal document | Issuing body | Effective/application date | Role | Key point | Review note |
|---|---|---|---|---|---|---|
| Law | Law on Occupational Safety and Hygiene 84/2015/QH13 | National Assembly | Effective 01/07/2016 | Framework for strict OSH machinery/equipment | Inspection, training and safe operation | Relevant after installation and operation. |
| Decree | Decree 44/2016/ND-CP | Government | Effective 01/07/2016 | Technical safety inspection and OSH training | Inspection and training conditions | Used after customs clearance/installation. |
| Circular | Circular 36/2019/TT-BLDTBXH | MOLISA | Effective 01/03/2020 | List of machinery/equipment with strict OSH requirements | Section I lists thermal oil heaters | Core legal document for this item. |
| Group 2 goods | Circular 01/2021/TT-BLDTBXH | MOLISA | Effective 18/07/2021 | List of potentially unsafe products/goods under MOLISA | Section I/II distinction and import quality inspection measures if applicable | Review actual goods name/HS; do not conclude import quality inspection is required unless the goods match the list. |
| Inspection procedure | QTKD 02-2016/BLDTBXH, issued with Circular 54/2016/TT-BLDTBXH | MOLISA | Issued in 2016 | Technical safety inspection procedure for thermal oil heaters | File review, technical inspection, testing, operation check | Applies to first/periodic/extraordinary inspection. |
| Used machinery | Decision 18/2019/QD-TTg | Prime Minister | Effective 15/06/2019 | Import of used machinery/equipment/lines | Age, standards, appraisal certificate | Applies only if not new 100%. |
| Tariff | Decree 26/2023/ND-CP; Decree 199/2025/ND-CP | Government | Decree 26 effective 15/07/2023; Decree 199 effective 08/07/2025 | MFN tariff and amendments | Heading 8419 and relevant 8-digit codes | Check at declaration date. |
| VAT | VAT Law 48/2024/QH15; Decree 181/2025/ND-CP; VAT reduction documents if still effective | National Assembly; Government | New VAT framework from 01/07/2025 | VAT treatment for imported machinery | Check exclusion/reduction status at declaration date | Do not hard-code 8% without checking the VAT policy at declaration date. |
| Labeling | Decree 43/2017/ND-CP; Decree 111/2021/ND-CP | Government | Review current effect | Imported goods labeling | Goods name, origin, importer, basic specs | Review original/supplemental label before ETA. |
VIEW / DOWNLOAD ORIGINAL LEGAL DOCUMENTS
Enterprises may search legal documents by number on official legal portals, the Government portal or the issuing authority website. Enterprises should cross-check the legal document portal or issuing authority website before applying.
CUSTOMS DOCUMENT SET
Commercial documents
- Commercial Invoice
- Packing List
- B/L or AWB
- Contract/PO
- C/O if preferential duty is claimed
- Product photos, model/serial list
Technical/specialized file
- Catalogue/datasheet
- P&ID, GA drawing, manual
- Nameplate, test certificate
- CO/CQ, factory certificate
- Technical safety inspection/OSH file; Group 2 import file only if the actual goods match the list
Matching rule
Name, model, serial, capacity, heat source, pressure/temperature, origin, quantity and value must match 100% between documents and technical file.
OPERATIONAL DOCUMENT CHECKLIST
| File group | Required documents | Used for | Prepared by | Common error | Pre-ETA check |
|---|---|---|---|---|---|
| Commercial | Invoice, Packing List, Contract/PO, B/L/AWB | Declaration, value, quantity | Importer, shipper, forwarder | Generic “heater/boiler” description | Match model, serial, parts, packages, value. |
| Technical | Catalogue, datasheet, P&ID, GA drawing, manual, nameplate | HS, policy, safety inspection | Supplier/technical team | Missing pressure, temperature, capacity, medium | Request full technical file before booking. |
| Safety/Group 2 | CO/CQ, test certificate, QTKD/QCVN/TCVN, factory certificate | Technical safety inspection; import quality inspection only if the goods match the list | Supplier/importer/inspection body | Missing file for post-clearance inspection | Prepare translation and installation file. |
| Used goods if any | Appraisal certificate, year of manufacture, condition | Decision 18/2019 | Importer/appraisal body | Cannot prove equipment age/status | Arrange appraisal before shipment if possible. |
| Origin | C/O if preferential duty is claimed | Special preferential duty | Shipper/exporter | Wrong form, description, model | Pre-check draft C/O before ETA. |
CLEARANCE DECISION POINTS THAT MAY HOLD THE SHIPMENT
| Decision point | Question | Evidence | Consequence if unclear | Recommended action |
|---|---|---|---|---|
| Product nature | Is it a thermal oil heater, steam boiler or heat exchanger? | Catalogue, P&ID, process description | Wrong HS and policy | Confirm operating principle before declaration. |
| Strict OSH equipment | Does Circular 36/2019 apply? | Datasheet, nameplate, temperature/pressure specs | Missing inspection/compliance step | Check the strict OSH list, QTKD 02-2016 and Group 2 import file only if the goods match the list. |
| Goods condition | New 100% or used? | Invoice, photos, serial, manufacture year | Used machinery blockage | Require supplier confirmation. |
| HS and duties | Is 8419.89.19 sufficiently supported? | Technical file, BOM, main function | Wrong duty, C/O, post-clearance duty risk | Prepare HS comparison matrix. |
| C/O | Does C/O match HS, model and description? | Draft C/O, invoice, packing list | No preferential duty | Pre-check draft before issuance. |
| Post-clearance operation | Is safety inspection planned before operation? | Installation file, QTKD, inspection body | Cannot operate legally | Schedule inspection with installation plan. |
E2E OPERATIONAL WORKFLOW
Pre-ETA review
Finalize product nature, HS, duty, C/O, new/used status, Group 2 list review if applicable and safety inspection requirements.
Lock documents and technical file
Lock Invoice, Packing List, B/L/AWB, catalogue, datasheet, P&ID, nameplate, BOM and model/serial list.
Prepare specialized inspection/appraisal if any
Prepare Group 2 file if applicable, used machinery appraisal and post-installation safety inspection plan.
Customs declaration
Be ready to explain HS, customs value, C/O, goods condition, main function, accessory set and specialized policy.
Clearance, installation, safety inspection and recordkeeping
Deliver to factory, install, complete technical safety inspection before operation, label if needed and archive the file.
PRE-ETA RISK CHECKLIST
| Risk | Impact | Pre-ETA control | Documents |
|---|---|---|---|
| Generic “boiler/heater” description | Wrong HS and policy | Describe thermal oil heater, heat source and capacity | Catalogue, P&ID, nameplate |
| Missing safety inspection file | Cannot operate after clearance | Request CO/CQ, test certificate, manual, drawings | Technical dossier |
| Used goods declared as new | Appraisal request or Decision 18 issue | Confirm status and year | Serial, photos, appraisal certificate |
| C/O mismatch | Loss of preferential duty | Pre-check draft C/O | C/O, invoice, packing list |
| Accessories missing from packing list | Difficulty proving set, value and HS | Separate main heater, burner, pump, control panel | BOM, packing list, photos |
FAQ
| Question | Answer |
|---|---|
| Does thermal oil heater import require a permit? | Do not conclude absolutely. Review strict OSH list, MOLISA Group 2 list if applicable, goods condition and actual file. |
| What is the HS code? | Reference 8419.89.19 for other electrically heated equipment; confirm by structure and operating principle. |
| Is safety inspection required before use? | Very likely. Review QTKD 02-2016/BLDTBXH and arrange technical safety inspection before operation. |
| Can used equipment be imported? | Review Decision 18/2019, equipment age, standards and appraisal certificate. |
| Is VAT 8% or 10%? | Check at declaration date. Some machinery codes may apply 8% under VAT reduction policy; baseline must be verified. |
| Can C/O reduce duty? | Possibly, if form, origin criteria, description and HS are valid; it does not replace safety/quality compliance. |
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