Introduction to EN 10204 Standard
What Is EN 10204?
EN 10204 is a European standard that defines the types of inspection documents supplied to purchasers for all metallic products, including steel pipes, plates, bars, and flanges. It provides an internationally recognized system to ensure that the delivered material meets both technical and quality requirements as stated in the purchase order.
In the steel pipe industry, Mill Test Certificates (MTCs) are the most common form of EN 10204 compliance documentation. They certify that the product's chemical composition and mechanical properties meet the required specifications.
Why EN 10204 Matters
For projects involving pressure systems, oil & gas transmission, or structural fabrication, traceability is critical. EN 10204 test certificates provide verifiable assurance of material conformity. At Huayang Steel Pipe, every steel pipe undergoes detailed inspection and is supplied with a corresponding EN 10204 certificate, ensuring customers receive reliable, tested, and traceable products.
Overview of EN 10204 Certificate Types
Understanding the Four Main Types
EN 10204 includes four certificate levels: 2.1, 2.2, 3.1, and 3.2, each representing a different degree of verification and testing rigor.
| Certificate Type | Document Type | Description | Validation Authority |
|---|---|---|---|
| EN 10204 2.1 | Declaration of Compliance | Confirms that the material complies with the order, no test results included | The Manufacturer |
| EN 10204 2.2 | Test Report | Confirms compliance, includes non-specific test results | The Manufacturer |
| EN 10204 3.1 | Inspection Certificate 3.1 | Includes results of specific inspection and tests for the delivered batch | Manufacturer's Authorized Representative (independent of production) |
| EN 10204 3.2 | Inspection Certificate 3.2 | Includes specific inspection results, validated by manufacturer and third-party inspector | Manufacturer + Buyer's/Third-Party Inspector |
These four types reflect increasing levels of control-from basic declarations to fully traceable, third-party verified certification.
EN 10204 Type 2.1 and 2.2 Certificates
EN 10204 Type 2.1 – Basic Declaration
Type 2.1 is the most fundamental certificate.
It simply declares that the manufacturer has produced the steel according to the order specifications, but it does not include test results or inspection records.
This level of documentation is suitable for non-critical components where material traceability or testing verification is not mandatory.
EN 10204 Type 2.2 – Generic Test Report
A Type 2.2 certificate includes generic test results or reference test data obtained from previous production of similar materials.
Although this certificate provides more technical information, it does not guarantee batch-specific testing or full traceability.
Typical usage: low-risk fabrication, non-pressure-bearing components, or general structural steel.
EN 10204 Type 3.1 Certificate
What Is an EN 10204 3.1 Certificate?
The 3.1 certificate is one of the most widely used in international steel trade. It confirms that the material has been individually tested and complies with the technical requirements of the order.
The test results are validated and signed by an authorized quality control department representative, independent from the production team.
What's Included in a 3.1 Certificate
A 3.1 MTC typically contains:
- Manufacturer name and address
- Product name, dimensions, and batch number
- Applicable material standard (e.g., ASTM A106, API 5L, EN 10219)
- Chemical composition analysis results
- Mechanical test results (tensile, yield, elongation, hardness)
- Additional tests (e.g., hydrostatic, ultrasonic, impact)
- Inspector's signature and date of certification
Where It's Required
EN 10204 Type 3.1 certificates are mandatory for pressure systems, pipelines, boiler tubes, and any application under PED (Pressure Equipment Directive) or ASME compliance.
At Huayang Steel Pipe, all seamless and ERW steel pipes for export can be supplied with EN 10204 3.1 certificates issued directly by our independent quality assurance laboratory.
EN 10204 Type 3.2 Certificate
What Makes 3.2 Different?
EN 10204 Type 3.2 represents the highest level of certification, involving both the manufacturer's inspection and verification by an independent third party, such as SGS, BV, TUV, or the customer's own authorized inspector.
This ensures dual validation:
- The mill confirms that the material meets all technical specifications.
- The third-party inspector independently verifies the results.
Application of Type 3.2 Certification
This certification is typically required for:
- Critical offshore and subsea pipelines
- High-pressure vessels
- Aerospace or nuclear installations
- International EPC (Engineering, Procurement & Construction) contracts
Summary Table: 3.1 vs 3.2 Certification
| Criteria | EN 10204 3.1 | EN 10204 3.2 |
|---|---|---|
| Inspection By | Manufacturer's QA Department | Manufacturer + Third-Party Inspector |
| Test Scope | Batch-specific | Batch-specific + Independent Verification |
| Traceability | Full | Full |
| Cost | Moderate | High |
| Common Use | Industrial Piping, Boilers | Offshore, Petrochemical, EPC Projects |
At Huayang, our large-diameter LSAW and ERW steel pipes for oil & gas and infrastructure projects often undergo 3.2 certification to meet stringent international procurement requirements.
Why EN 10204 Certification Matters for Steel Pipe Buyers
Ensuring Material Traceability
With global supply chains, material authenticity is a major concern. EN 10204 certificates guarantee that each batch of steel pipe is traceable back to its heat number, chemical composition, and production records.
Compliance with International Standards
Most global projects, especially in Europe, the Middle East, and Southeast Asia, require EN 10204-compliant documentation as part of project submittals.
At Huayang, our EN 10204-certified steel pipes also conform to:
- ASTM A106 / A53 (for seamless and welded pipes)
- API 5L PSL1/PSL2 (for line pipe)
- EN 10219 / EN 10210 (for structural hollow sections)
-
Enhanced Buyer Confidence
When a buyer receives an EN 10204 3.1 or 3.2 certificate with a steel pipe shipment, it means the product has undergone verified testing and inspection. This builds trust and minimizes the risk of material rejection during third-party audits or client inspections.
Huayang Steel Pipe's Certification and Quality Control
Our Inspection and Testing Capabilities
At Hebei Huayang Steel Pipe Co., Ltd., quality control is fully integrated from raw material to final shipment.
We operate advanced inspection systems, including:
- Optical emission spectrometers for chemical composition analysis
- Automatic ultrasonic flaw detection systems
- Hydrostatic pressure testing for every pipe
- Tensile and impact testing under international standards
Certification Coverage
Huayang supplies EN 10204 3.1 and 3.2 certificates for all product ranges, including:
| Product Type | Diameter Range | Wall Thickness | Certification Option |
|---|---|---|---|
| ERW Steel Pipe | 21.3–660.4 mm | 2.5–22 mm | 3.1 / 3.2 |
| LSAW Steel Pipe | 406.4–1422 mm | 7–50 mm | 3.1 / 3.2 |
| SSAW Steel Pipe | 219.1–2850 mm | 6–25 mm | 3.1 |
| Structural Hollow Section | 20×20–1200×1200 mm | 1.5–60 mm | 3.1 |
All data is digitally stored and traceable through Huayang's production management and ERP systems, ensuring seamless documentation during project submittals.
Conclusion
EN 10204 test certificates are a cornerstone of material assurance in the global steel industry.
From simple declarations (2.1, 2.2) to fully traceable and independently verified documents (3.1, 3.2), these certificates safeguard quality, transparency, and trust across supply chains.
At Huayang Steel Pipe, every shipment is backed by certified test documentation, precision inspection, and global third-party validation - ensuring our clients receive the highest quality pipes with full traceability.
