Differences between EN 10204 3.1 and 3.2 Certificates
Date:2025-08-07
1. EN 10204 3.1 Certificate (Manufacturer's Declaration)
Essence:
The manufacturer declares, based on its own quality control system, that the product meets the order requirements (e.g., technical standards, chemical composition, mechanical properties, etc.).
Issuing Party:
The manufacturer's authorized internal representative (e.g., Quality Manager).
Verification Requirements:
No independent third party involvement; reliance solely on the manufacturer's internal test data.
The buyer may request test reports (e.g., heat analysis, mechanical testing), but these data are not externally verified.
Applicable Scenarios:
Non-pressure structural components, general piping, low-risk industrial applications;
The buyer trusts the manufacturer's qualifications, or the contract does not mandate independent verification.
Risk Warning:
If quality issues arise, the manufacturer bears full responsibility, but the lack of third-party verification may lead to disputes.
2. EN 10204 3.2 Certificate (Third-Party Verification Statement)
Essence:
An independent third-party organization (such as TÜV, SGS, BV, etc.) confirms that the product meets the order requirements through inspection or witnessed testing.
Issuer:
A qualified third-party organization (must be independent of the manufacturer).
Verification Requirements:
The third party must perform at least one of the following:
✅ Review of the manufacturer's original test records;
✅ Witness of key testing procedures (such as chemical analysis, tensile testing, non-destructive testing);
✅ Retesting of samples (according to agreed standards).
The certificate must clearly state the scope, methods, and results of the verification.
Applicable Scenarios:
Pressure equipment (boilers, pressure vessels, piping);
Safety-critical sectors such as petrochemicals, nuclear power, and aerospace;
Regulatory requirements (such as the EU PED Directive and ASME Code).
