This is the most commonly specified document in heavy industry. Type 3.1 requires that the manufacturer provide a certificate confirming compliance with the order, and that the test results come from specific inspection – meaning tests performed on the actual products or the specific casting/heat/lot to be delivered.
First published in 1991 and significantly revised in 2004 (the current version is EN 10204:2004), this standard has become the de facto global language for material certification, referenced in countless international specifications, from ISO standards to ASTM, and is mandatory for products placed on the European market under the Pressure Equipment Directive (PED) or Construction Products Regulation (CPR). EN 10204 is built on a hierarchy of responsibility and rigor. At its heart, it distinguishes between statements made by the manufacturer (the producer of the metallic product) and those verified by an independent body not associated with the manufacturer. en 10204
Type 2.1 is the most basic declaration. The manufacturer simply states, on a document they produce, that the products supplied comply with the requirements of the order. No test results are provided, and no reference is made to specific inspections. It is essentially a commercial statement of good faith. This is the most commonly specified document in