Can any one tell UT as per ASTM-578 which acceptance criteria is more straingent either LEVEL B or LEVEL C?
Level C is more stringent compared to level B.As per level C,more than 1" continous total loss of back wall reflection plates are rejected.
Yes,you can certify as level B.
level c. is more straingent .
ASTM A 578 level C or B which is equilent to EN 10160 S1 E1
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