European standard EN 10204 defines different types of certificates (inspection documents), which are provided to the customer (to the consumer) according to the requirements of the contract, upon delivery of all metal products, eg, slabs, sheets, rods, forgings, castings for any method of their manufacture. In edition 2004 this standard may also apply to non-metallic products.
EN standard 10204 "Grew" out of German DIN 50049, which defined the requirements for certificates for metal products. During the harmonization of European standards in the late 1980s, this standard was taken as the basis for the corresponding European standard..
Product certificates according to EN 10204:2004
This European standard, its current edition is EN 10204:2004, used in conjunction with the technical requirements for the product, which determine the technical conditions for its delivery.
EN standard 10204:2004 includes four types of certificates:
- two kinds - 2.1 and 2.2 Are certificates, which are issued based on the results of workshop or factory tests and inspections;
- two kinds - 3.1 and 3.2 Are certificates, which are issued based on the results of product testing to technical requirements, which are "spelled out" in the technical specifications for the supply of products.
EN standards 10204:2004 и IN 10204:1991
EN standard 10204:2004 replaced the "old" EN standard 10204:1991. In the new standard:
- certificate 2.3 excluded;
- 3.1B certificate replaced by a certificate 3.1;
- certificate 3.1A replaced by a certificate 3.2;
- certificate 3.1C replaced by a certificate 3.2.
Certificate 2.1 according to EN 10204
This is the lowest level EN certification 10204. In this document, the direct manufacturer - the plant - simply declares, what did he produce, eg, steel plates, according to customer or contract requirements. This certificate does not include any data in the form of test results.. Such a certificate, usually, signed by the responsible person at the level of the shop manager, on which these products were manufactured.
Certificate 2.2 according to EN 10204
Certificate 2.2 also produced by the production workshop. In this case, the manufacturer declares with its certificate, what, eg, steel, meets the technical requirements of the customer or contract, and also provides test results to confirm that, what is it exactly. In this case, the quality control department, which issues this certificate, is a part of this workshop - product manufacturer. Therefore, in this case, there may be a certain distrust of the test results..
Certificate 3.1 according to EN 10204
Certificate 3.1 requires the manufacturer to fulfill a number of important requirements. First of all, the manufacturer must test the exact batch of products, eg, steel plates, which is directly sold. Therefore, the test results according to the certificate refer to the supplied products and characterize the properties of that batch, which is supplied - within those limits, which allows the applied sampling method.
Secondly, this certificate is required, so that the tests are carried out by the testing laboratory, which is formally independent of production, eg, rolling mill. It means, that the production unit - the workshop - does not perform tests and does not have power, to change or influence test results. Combined with a quality system, such as in EN 9001:2010, certificate 3.1 according to EN 10204 much more authoritative, than certificates 2.1 and 2.2.
Certificate 3.2 according to EN 10204
Certificate 3.2 - the most stringent of all types of certificates according to EN 10204. Like the certificate 3.1 this certificate is based on tests by an independent factory laboratory of samples from that particular batch of products, which is supplied. but, Besides, this certificate must be endorsed - endorsed - by the customer's representative or the appropriate government authority.
In practice, the certificate 3.2 produced jointly by the manufacturer's quality control unit and independent third party inspectors, usually a reputable certification body, such as, eg, for steel sheets, TUV or LloydsRegister.