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EN 10204 3.1 vs 3.2 Certificates: What Steel Buyers Need to Know
This article explains the practical difference between EN 10204 3.1 and 3.2 inspection certificartes, including who validates them, what test information they contain, and when steel buyers may need each type. When you purchase steel for a project, the material itself is only part of the orde. The documents behind it can be just as important. For many international buyers, en 10204 3.1 and 3.2 certificates are common requirements, especially for pressure equipment, structural projects, piping and other controlled applications. The two certificates may look similar, but they do not provide the same level of verification.
When you purchase steel for a project, the material itself is only part of the order. The documents behind it can be just as important. For many international buyers, EN 10204 3.1 and 3.2 certificates are common requirements, especially for pressure equipment, structural projects, piping, and other controlled applications.
The two certificates may look similar, but they do not provide the same level of verification.
What Is an EN 10204 3.1 Certificate?
An EN 10204 3.1 certificate is issued by the manufacturer and confirms that the supplied material complies with the order requirements.
It normally includes specific inspection results for the supplied material, such as chemical composition and mechanical test results. The document is validated by the manufacturer's authorized inspection representative who is independent of the manufacturing department.
For many routine steel purchases, a 3.1 certificate provides the traceability and test information buyers need.
How Is an EN 10204 3.2 Certificate Different?
A 3.2 certificate adds another level of validation.
In addition to the manufacturer's authorized inspection representative, the certificate is also validated by the purchaser's authorized inspection representative or an inspector designated under official regulations.
You can think of 3.1 as the manufacturer presenting its verified test record, while 3.2 adds an additional independent party to confirm the inspection and compliance process.
This extra involvement usually means more coordination, time, and cost.
When Do Buyers Need 3.1 or 3.2?
The correct certificate depends on the project specification.
A 3.1 certificate is commonly requested for general industrial steel, structural materials, and many standard engineering applications.
A 3.2 certificate may be required for more tightly controlled projects, pressure-related applications, critical equipment, or contracts that specifically require purchaser or third-party inspection involvement.
Buyers should confirm the document requirement before production starts. Asking for 3.2 after the material has already been produced may create delays or make compliance difficult.
What Should You Confirm Before Ordering?
Your RFQ should clearly state the required EN 10204 certificate type, material grade, standard, testing requirements, inspection scope, and any third-party involvement.
At Dongte Steel, we supply steel products for international distributors, fabricators, contractors, and project buyers, with material documentation and inspection requirements reviewed before order confirmation. And we have steel plate, steel coil, steel pipe, steel bar, steel profile, rebar, wire rod, aluminum, brass, ductile iron pipe.
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