MILL TEST CERTIFICATE (REPORT)
A Mill Test Report (MTR), often also called Mill Test Certificate (MTC), Inspection Certificate or Certificate of Test, is a quality assurance document (issued by a manufacturer, or mill, to a distributor, stockholder, reseller or end user) that certifies the features of a product, its compliance to the applicable norms and standards (example API 5L for pipes) and, its chemical, physical and mechanical properties. Typically, European mills issue mill test certificates according to the EN 10204 standard.
MILL TEST CERTIFICATE CONTENT
Mill test certificates to EN 10204 generally show the following content:
- Type of certificate and standard (example EN 10204 3.1 or EN 10204 3.2)
- Manufacturer name
- Product name and dimensions
- Quantity covered by the certificate (example: tons, with heat numbers)
- Heat numbers and batch number (physically shown on the product as well)
- final test result
- Dimensional measurements, to check compliance with allowed tolerances (example, for steel pipes: diameter, wall thickness, length, straightness)
- Material grade and applicable specification, including results of chemical and mechanical tests
- Results of additional tests, like hydrostatic, ultrasounds (UT), hardness, impact test, magnetic particles, metal graphic result etc.
- Addenda useful to appraise the full features of the product
Sample mill test certificate (Tenaris steel pipes).
TYPES OF MILL TEST CERTIFICATES (EN 10204 2.1, 2.2, 3.1, 3.2)
|Certificate denomination in…|
|English||German||French||Scope||MTC to be validated by…|
|MTC Type 2.1||Declaration of compliance with the order||Werk-
|Attestation de conformité á la Commande||Statement of compliance with the order||The manufacturer|
|MTC Type 2.2||Test report||Werkzeugnisse||Relvé de contrôle||Statement of compliance with the order by the manufacturer based on non-specific inspections (tests) by the manufacturer.||The manufacturer|
|MTC Type 3.1||Inspection certificate 3.1||Abnahmeprüf-
|Certificat de réception 3.1||Statement of compliance with the order by the manufacturer with results of a specific inspection||The manufacturer`s authorized inspection representative, independent by the manufacturing department|
|MTC Type 3.2||Inspection certificate 3.2||Abnahmeprüf-
|Certificat de réception 3.2||Statement of compliance with the order with indication of results of a specific inspection||
EN 1024 3.1 MILL TEST CERTIFICATES
|Certificate type||Title||Summary of EN10204 requirements||Notes|
|3.1||Inspection certificate||Statement of compliance with the order by the manufacturer with results of specific inspection||Replaces 3.1B. Common certificate type issued for ‘batch tested’ material. Cert. issued and signed by manufacturer’s representative, who must be independent of the manufacturing department. Eg Inspection department or test house manager/supervisor.|
|3.1A||Inspection certificate 3.1A||With a mention of test results from specific inspection and testing||Batch test results. Cert. issued by independent inspector required by releasing authority (eg TUV for German pressure vessels). Replaced by 3.2 in 2004|
|3.1B||Inspection certificate 3.1B||With a mention of test results from specific inspection and testing||Batch test results. Cert. issued and signed by manufacturer’s representative. Replaced by 3.1 in 2004|
|3.1C||Inspection certificate 3.1C||With a mention of test results from specific inspection and testing||Batch test results. Cert. issued by an independent inspector appointed by a customer (eg Lloyds). Replaced by 3.2 in 2004|
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