Comparison of old and new quality levelsThis specification is derived from the following test and delivery instructions for componentsmentioned in the scope of application of these test instructions:1) HZLM 25000: Test instructions - Stellited parts, acceptability of defects detected duringnon-destructive testing - Ultrasonic testing2) HZLM 20202: Testing instruction – Build-up welding with 12 % chromium steels –Testing and quality requirementsThese specifications 1) and 2) are no longer cited for new plants.3) HZLM603106. Delivery Instructions - Parts for general purposes - Acceptability ofsurface defects