ACCEPTANCE CRITERIA ASME B31 3(2)

ACCEPTANCE CRITERIA FOR EXAMINATED WELDS ACCORDING TO ASME B31 3 Table 341.3.2 (continued) Symbol

Measure

Acceptable Value Limits [Note (6)]

A

Extent of imperfection

Zero (no evident imperfection

B

Depth of incomplete penetration Cumulative length of incomplete penetration

≤ 1 mm (1⁄32 in.) and ≤ 0.2Tw ≤ 38 mm (1.5 in.) in any 150 mm (6 in.) weld length

C

Depth of lack of fusion and incomplete penetration Cumulative length of lack of fusion and incomplete penetration

≤ 0.2Tw ≤ 38 mm (1.5 in.) in any 150 mm (6 in.) weld length

D

Size and distribution of internal porosity

See BPV Code, Section VIII, Division 1, Appendix 4

E

Size and distribution of internal porosity

For Tw ≤ 6 mm (1⁄4 in.), limit is same as D For Tw > 6 mm (1⁄4 in.), limit is 1.5 3 D

F

Slag inclusion, tungsten inclusion, or elongated indication Individual length Individual width Cumulative length

≤ Tw /3 ≤ 2.5 mm (3⁄32 in.) and ≤ Tw /3 ≤ Tw in any 12Tw weld length

Slag inclusion, tungsten inclusion, or elongated indication Individual length Individual width Cumulative length Depth of undercut Depth of undercut

≤ 2Tw ≤ 3 mm (1⁄8 in.) and Tw /2 ≤ 4Tw in any 150 mm (6 in.) weld length ≤1 mm (1⁄32 in.) and Tw /4 ≤1.5 mm (1⁄16 in.) and [Tw /4 or 1 mm (1⁄32 in.)]

G

H I