Prequalification test

Some Military Specifications have Qualified Products Lists (QPL). As a means of expediting contract awards and deliveries of certain products, manufacturers sometimes are required to have their products pretested, either by a Government or a designated independent laboratory, to determine whether the products meet the specific requirements of Government specifications. If the products comply, the manufacturer s product may be placed on a Qualified Products List. These QPL s, which may be either Federal or Military, are prepared for only those specifications which require prequalification tests. 

The design of proprietary post-installed anchors generally depends on information developed via prequalification testing. ACI 355.2 is a prequalification standard for post-installed mechanical anchors that provides data for design in accordance with ACI 318 Appendix D. It has been incorporated into ICC-ES acceptance criterion AC 193 for the purpose of issuing evaluation reports for these products. 

Sufficient time must be allowed for the necessary testing, e.g. stability testing or bioequivalence testing. Based on the information submitted, the person responsible for prequalification should decide whether to approve the changes or whether to request additional data which demonstrate the equivalence of the product to the one that has been prequalified. 

The prequalification of these materials was carried out by static and cyclic oxidation tests at 1200-1300 °C. First test components (80 x 30 x 3 mm) were produced (Fig.2) and successfully tested on the high pressure sector test rig at DLR. The test conditions chosen - 20 cycles at 20 bar, approximately 1200 °C, in air for a total duration of 4 hours - are representative for operating conditions. 

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