Third-Party Inspection (TPI) is an independent inspection of cargo by a non-affiliated firm, typically conducted before the cargo ships from China to verify quantity, quality, packaging, marking, and document conformance against the contract. The pre-shipment inspection (PSI) is the most common form, performed at the factory or at the port before the cargo loads onto the vessel. The dominant providers are SGS, Bureau Veritas, TUV Rheinland, TUV SUD, Intertek, and Cotecna. A typical PSI costs USD 300-1,500 per shipment depending on cargo complexity, with the report delivered before vessel loading. This entry covers the broader Third-Party Inspection category. TUV Inspection, Intertek Inspection, and Pre-Shipment Inspection are all variants, and the buyer’s perspective on choosing and using a TPI.
What a TPI inspection covers
A typical PSI covers six dimensions:
| Dimension | Detail |
|---|---|
| Quantity | Count, weight, volume verified against the packing list |
| Quality | Cargo specification (purity, particle size, moisture, etc.) verified by sampling and lab analysis |
| Packaging | UN-certified for DG; properly sealed; pallet/drum integrity |
| Marking | Labels, hazard pictograms, country-of-origin marks present and correct |
| Documentation | COA, MSDS, packing list, certificate of origin all present and consistent |
| Loading | Container loading observed and documented; UN-compliant for DG cargo |
For chemical cargo specifically, the QC dimension is where the third-party value sits. Chinese factories’ internal QC reports are typically accurate but cannot be assumed; an independent test by an SGS, Bureau Veritas, or Intertek lab provides the verification.
Major TPI providers
| Provider | Typical strength | Chemical-cargo focus |
|---|---|---|
| SGS | Global brand, extensive Chinese network, standardised protocols | Strong across chemical commodities |
| Bureau Veritas | Similar to SGS | Strong for European-market certifications |
| TUV Rheinland | German engineering tradition | Strong for high-purity / fine chemicals |
| TUV SUD | German engineering tradition | Similar to TUV Rheinland |
| Intertek | Global network | Strong for pharmaceutical-grade and food-grade chemicals |
| Cotecna | Mid-tier | Common for Africa-bound shipments |
| Cinotest, CCIC | Chinese-domestic providers | Lower cost; less internationally recognised |
For most international chemical buyers, SGS or Bureau Veritas is the default choice. Specific markets and product categories may favour the others.
Pre-shipment inspection vs other inspection types
| Inspection type | When | Scope |
|---|---|---|
| Pre-production inspection (PPI) | Before production starts | Raw materials, factory readiness, sample production |
| In-process inspection (IPI) | During production | Mid-batch sampling and verification |
| Pre-shipment inspection (PSI) | After production, before loading | Full cargo verification (most common) |
| Loading supervision | At the loading event | Observation of container loading; UN compliance for DG |
| Container loading certificate | At completion of loading | Issue of compliance certificate |
| Post-shipment inspection | After cargo arrives at destination | Less common; for damage or dispute investigation |
The default for routine chemical sourcing is a single PSI before vessel loading, sometimes combined with loading supervision for DG cargo.
How TPI cost is structured
| Cost component | Typical range |
|---|---|
| Inspector visit and report | USD 200-600 |
| Lab analysis (per parameter) | USD 30-150 each |
| Lab analysis (full chemical battery) | USD 200-1,000 depending on substance |
| Travel and per-diem (for remote factories) | USD 100-400 |
| Loading supervision (additional) | USD 200-400 per day |
| DG-cargo packing certificate | USD 100-300 |
Total cost for a routine chemical PSI typically lands at USD 300-1,500. For specialty or pharmaceutical-grade with extensive lab analysis, USD 1,500-5,000 is more typical.
The TPI cost is normally paid by the buyer (since the buyer commissions the inspection), but for high-volume relationships some sellers absorb the cost as a relationship investment.
How TPI catches buyers off guard
Three failure patterns recur:
- Inspector inexperienced with the specific chemical. A general-purpose inspector who has never handled an IMDG Class 5.2 organic peroxide may miss specification gaps that an experienced chemical inspector would catch. Specify the inspector’s chemical-cargo experience when commissioning.
- Sampling not representative. A PSI taken from the top of the cargo may not represent the full lot if the cargo has settling or stratification issues. For bulk cargo, multi-point sampling is essential.
- Report timeline doesn’t match the booking. A PSI scheduled for the day before vessel loading leaves no time to address findings if there are non-conformances. Schedule the PSI 3-5 days before vessel loading to allow remediation.
When TPI is mandatory vs optional
| Cargo type | TPI typically |
|---|---|
| Bulk industrial chemicals (caustic, urea) | Optional but commonly used |
| Fine and specialty chemicals | Standard practice |
| Pharmaceutical-grade chemicals | Mandatory under good practice; usually combined with factory audit |
| Food-grade chemicals | Mandatory; certified inspectors with food-handling credentials |
| DG cargo | PSI + loading supervision typically combined |
| Cargo to AICIS/REACH/TSCA strict markets | Often combined with documentation review for regulatory compliance |
| First-shipment from a new supplier | Strongly recommended regardless of cargo type |
| Repeat-order from an established supplier | Risk-based; some buyers spot-check rather than every-shipment |
Practical sourcing notes
For chemical buyers using TPI:
- Establish a standing relationship with one TPI provider for consistency across multiple shipments.
- Specify the inspection scope explicitly in the PSI commissioning, purity tested by what method, samples taken from how many drums, etc.
- Receive the inspection report before the cargo loads onto the vessel. A report delivered after loading is too late for remediation.
- For DG cargo, combine PSI with MSA DG packing certification and IMDG-Code container loading observation.
Related terms
SGS and Bureau Veritas are the dominant TPI providers. Factory Audit is the broader pre-relationship inspection that complements per-shipment PSI. COA and MSDS are the documents that PSI verifies. IMDG Class 3 and other DG classes trigger additional PSI scope. Twenty-Foot Container loading is observed during the PSI.