FINISH AND CERTIFICATION6. Inspection certificatesThe manufacturer shall submit copy of the following documentation for eachlot and/or ring:-Certificate of origin of the steel with attached chemical analysis of the heatper lot.-Certificate of heat treatments performed, Times, temperatures per lot-Certificate of inspection with test results as per par. 5.1 per lot-Report of non-destructive tests as per par. 5.2.1, 5.2.2 and 5.2.3 per ring.All certificates shall also show:Purchase order number, reference to this specification withmodification/change reference letter, heat number, ring identification numberor cluster lot number and serial number of individual rings, test identificationnumber, manufacturer name and purchase order number.