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Certification of steel plates is generally to EN 10204. The actual certificate will depend on the plate offered but will either be 3.1 or 3.2. A 3.1 or 3.2 MTC means that the actual plate or heat sold will have been tested and a Mill Test Certificate (MTC) will accompany the plate.
EN 10204 3.1 Certification
3.1 is a certificate issued by the mill which declares that the plates are in compliance with the specification and includes the test results.
Test results are validated by the mill’s in–house test department which has to be independent of the manufacturing department.
EN 10204 3.2 Certification
3.2 Certification is more rigorous and the certificate is prepared jointly by the mill’s inspection department and an independent 3rd party inspectors are TUV or Lloyds Register. The certificate states that the plates are compliant with the relevant specification and the mill test certificate is included.
EN 10204 2.1 and 2.2 Certification
For Type 2 certificates the manufacturer declares compliance but does not specifically inspect the product. 2.1 certificates do not include test results and 2.2 certs supplies test results based on sampling, or other methodology, and the plates tested will not necessarily be the plates supplied. Oakley Steel does not offer plates certified to 2.1 or 2.2.
EC Pressure Equipment Directive 97/23/EC
Plates certified to 3.1 or 3.2 are in conformity with the EC Pressure Equipment Directive 97/23/EC for main pressure-bearing parts in categories II, III and IV. The full test of the directive can be found here.