Dear All,


Please refer below for ASME B31.3 acceptance criteria. To reject any indication i need to comply 3 rules :-

1. It must be linear indication
2. The indication level must be above reference level
3. Comply with Rejectable length.

If i never comply with one of the above criteria i cant reject any indcation. How about Lack of sidewall fusion , lack of penetration and crack which is consider as a serious indication? Do i still need to follow this 3 rules or can i reject this indication since its a serious indication? I am just concern about small thickness and please advice. I just found one lack of sidewall fusion which is :-

Length :4mm
Amplitude level : 50% DAC
Material thickness : 5.49 ( 3" sch 40)



ASME B31.3-ACCEPTANCE CRITERIA

344.6.2 Acceptance Criteria. A linear-type discontinuity
is unacceptable if the amplitude of the indication
exceeds the reference level and its length exceeds
(a) 6 mm (1⁄4 in.) for Tw ≤ 19 mm (3⁄4 in.)
(b) Tw/3 for 19 mm < Tw ≤ 57 mm (21⁄4 in.)
(c) 19 mm for Tw > 57 mm