ACCEPTANCE CRITERIA
Sl.
ASME SEC. – 8 Div. – 1,
No. TYPE OF DEFECT
1.
Crack / IF
2.
IP
None
Depth : < 1 mm. & 0.2 TW
None
None
3.
Slag / TI / Elongated
Cum. IP < 38mm. (1.5”) in any 6” weld length.
Individual length < 2 TW
2/3 t where t is the thickness
inclusion
Individual width < 3 mm. & < TW / 2
of the weld excluding
Cum. Length < 4 TW in any 6” WL
Porosity
allowed reinforcement.
c) Sum of the indication is <
a) Isolated
t in a length of 6t & the
4.
ANSI B - 31.3
For TW < 6 mm.
1/3 TW
longest indications are
For TW > 6 mm.
1/3 TW x 1.5
separated by 3L where L is
b) Random
the length of the longest
For TW < 6 mm.
1/4 TW
indications. The max. length
For TW > 6 mm.
1/4 TW x 1.5
of acc. Indication shall be
c) Aligned
¾”. Any such indications
For TW < 6 mm.
Sum of individual por. < TW in 12 TW
shorter than ¼” shall be acc.
For TW > 6 mm.
Sum of individual por. < TW in 12 TW x 1.5
for any plate t.
d) cluster
For TW < 6 mm.
Max. Size of cluster < 25 mm. (1”) or 2 TW
whichever is less.
5.
6.
7.
8.
Para. – UW – 52
For TW > 6 mm.
Max. Size of cluster < 25 mm. (1”) or 2 TW
B.T
U.C
whichever is less.
Check density of B.T with base metal
Should be reported
ACCEPTANCE CRITERIA
Sl.
TYPE OF
ASME SEC. – 8 Div. – 1,
No.
DEFECT
1.
Crack
API-1104
Shallow / Crater crack <4mm
None
2.
Lack of fusion
a) Individual < 1” (25mm)
None
3
(IF)
IFD
b) Cumulative < 1” in any 12” weld length.
a) Individual < 2” (50mm)
Incomplete
b) Cumulative < 2” in any 12” weld length
a) Individual length < 1” (25mm)
2/3 t where t is the thickness
penetration (IP)
b) Cumulative < 1” in any 12” weld length
of the weld excluding
c) < 8% of W L
allowed reinforcement.
4.
5
IPD
Para. – UW – 52
a) Individual length < 2” (50mm)
b) Cumulative < 3” (76) in any 12” weld length
6
ICP
a) Individual length < 2” (50mm)
b) Cumulative < 2” (50) in any 12” weld length
4.
Porosity
a) Individual
b) Cluster
< 3 mm. or 25% of WT
Diameter of CP < 13 mm.
Cumulative CP < 13 mm. in any 12” WL
Individual por. with in a cluster < 2 mm.
c) Hollow bead
Length of HB < 13 mm.
(HB)
Cumulative length of HB < 50 mm. in any 12” WL.
Individual HB > 6 mm. in length, separated by 50
5.
6.
B.T
mm.
Dimension of BT < ¼” (6.5 mm.) and density of BT
U.C
< thinnest base metal.
a) Cumulative length of EU & IU < 2” (50 mm.) in
any 12” WL.
7.
Slag, TI,
b) Sum of EU & IU in any combination < 1/6” WL.
a) Isolated (ISI) < ½” in 12” WL With <3 mm.
Elongated
b) ESI < 2” With < 1.6 mm.
inclusion
c) Cum. Length of ESI < 2”. (Pipe OD > 2-3/8”.
8.
ACCEPTANCE CRITERIA FOR WELDS
Types of Defects
ANSI B 31.3
API 1104
Normal Fluid Service
1
Crack
Zero / No Imperfections
Shallow Crater Or Star Crack ≤ 5/32”
(4mm)
2
Lack of Fusion (IF)
Zero / No Imperfections
3
Incomplete Penetration
(IP)
Depth Of IP ≤ 0.8 mm / < 0.2 Tw
Cumulative IP ≤ 1.5” (38 mm) in any 6” W.L
4
Slag Inclusion or
Elongated Indication
Individual Length ≤ 2 T w
Individual Width ≤ 1/8” (3.2 mm) / < Tw/2
Cumulative Length ≤ 4Tw in any 6” (150mm)
W.L
5
Undercutting
Not Applicable. But Should Be Reported
6
7
Concavity (IC)
Porosity (Por)
Check density with base metal
Isolated. For Tw <6 mm -1/3Tw. For > 6 mm1/3Tw x 1.5
Random. For Tw < 6 mm-1/4Tw. For > 6
mm-1/4Tw x 1.5
8
Burn Through
Check Density With Base Metal
9
Tungsten Inclusion
To be evaluated as rounded indication.
Elongated or aligned Tungsten Inclusions are
unacceptable.
IF
Individual ≤1” (25 mm)
Cumulative ≤ 1” (25 mm) in any 12”
W.L
IFD
Individual ≤ 2” (50 mm)
Cumulative ≤ 2” (50 mm) in any 12”
W.L
Cumulative length of IFD 8% for
W.L<12”.
IP
Individual ≤ 1” (25 mm)
Cumulative ≤ 1” (25 mm) in any 12” W
L / ≤ 8% W.L In 12” W.L
IPD
Individual ≤ 2” (50 mm)
Cumulative ≤ 3” (75 mm) in any 12”
W.L
ICP
Individual ≤ 2” (50 mm)
Cumulative ≤ 2”(50 mm) in any 12” W.L
Isolated (ISI) ≤ Length ½” (12.7 mm)
in any 12” W.L. Width (ISI) ≤3 mm
Elongated (ESI) ≤ 2” (50 mm) Width
(ESI) ≤1.6mm.
Cumulative Length (ESI) ≤ 2” (50 mm)
(All For Pipe >2.3/8”
Cumulative Length of EU & IU ≤ 2”
(50mm) in any 12” W.L. Sum of EU &
IU Lengths in any Combination ≤ 1/6 of
W.L
Check density with base metal
Individual 1/8”(3.2 mm) or ≤ 25% of
W.T
Cluster < ½” (12.7mm)
Cumulative Cluster ½” (12.7mm) in
any 12” W.L
Individual Por with in a cluster 1.6mm
Hollow Bead length < ½”
Cumulative HB 2” (50mm) in any 12”
W.L
Individual HB < 6 mm separated by <2”
Sum Of HB Length < 8% of W.L
Dimensions Of Bt< ¼” (6.4mm)
Density Bt < Tw.
Individual TI is to be evaluated as
rounded indications (Por). Elongated or
aligned Tungsten Inclusions are
unacceptable.