The document provides acceptance criteria for various types of defects found during radiographic testing of welds based on different codes and standards including API 1104, SP-1174, B31.3, and ASME Section IX. It lists the maximum allowable size, length, and aggregate length of defects such as cracks, incomplete penetration, incomplete fusion, burn through, slag inclusions, porosity, and undercutting.

1. RADIOGRAPHY ACCEPTANCE CRITERIA
Prepared by: Mathew.N.Samuel- OSE311M (Marmul)
Type of Defect API 1104 SP-1174 B31.3 (Normal)
Clik link SOUR NON SOUR Clik link
Crack X X X
L > 5/32' (4mm)
Shallow / Catter Crack measured in any X X
direction
a- L > 1"
Ag.L1" (In any
Inadequate Penetration b
continuous X Same as API 1104
(without High low) -
12"WL)
Ag.L>8% of WL
c-
(if WL < 12")
a- L> 2" (50mm) a-
Inadequate Penetration Ag.L > 3" X Same as API 1104
(with High low)
b
(in any b-
-
continuous 12"
WL )
a- L> 2" (50mm)
X Same as API 1104
Ag.L > 2"
Inadequate Cross
Penetration b
- (in any
continuous 12"
WL ) X Same as API 1104
a- L > 1" (25mm)
Ag.L1" (In any
b
Incomplete fusion continuous X Same as API 1104
-
12"WL)
Ag.L > 8% of WL
c-
(if WL < 12")
a- L > 1" (25mm)
Incomplete fusion Ag.L1" (In any
b
(due continuous X Same as API 1104
-
to cold lap) 12"WL)
Ag.L > 8% of WL
c-
(if WL < 12")
1 For Pipe OD >2" (60.3mm)
1 Max Ø >¼"
a- (6mm)
1 Max Ø> t of
b thinnest adj. Same as API 1104 Same as API 1104
- Base metal
Burn Through (BT)

2. Ag L> ½" (13mm)
in any continuous
1
12" weld or total Same as API 1104 Same as API 1104
c-
WL (whichever is
Burn Through (BT) less)
2 For Pipe OD <2 3/8"
2 Max Ø >¼"
a- (6mm)
2 Max Ø> t of
b thinnest adj. Same as API 1104 Same as API 1104
- Base metal
More than one
2
Burn through of
c-
any size
If Density of the
Radiographic
Image of the
a- Weld Metal
exceeds that of
thinnest adj.Base
Metal
Internal Concavity (The areas that Same as API 1104 Same as API 1104
exceeds the
Density of the
b thinnest adjcent
- parent metal,The
criteria for Burn
Through are
applicable)
Under Cutting
EU-External Under cutting a- EU + IU > 2"
Same as API 1104 Same as API 1104
b EU + IU > 1/6th
IU-Internal Under cutting
- of WL
For Pipe OD> 2" (60.3 mm)
L > 2" Width
a- a-
>1/16" (1.6mm)
Ag.L>2" (in any
Elongated Slag Incl b
continuous 12" Same as API 1104 Same as API 1104 & b-
(only in - & Tungsten and Tungsten and
WL)
fussion zone) copper inclusiions copper inclusiions
continuous/brocken/ Ag.L of ESI + ISI shall be treated as shall be treated as
c- c-
wagontracks - ESI- > 8% of WL slag inclussion for slag inclussion for
Elongated Slag Inclussion the purposes of the purposes of
assessment assessment
Elongated Slag Incl For Pipe OD< 2" (60.3 mm)
a- L > 3t
b
Width of ESI >
Same as API 1104 Same as API 1104
- 1.6mm
Ag.L of ESI + ISI
c-
> 8% of WL
Isolated Slag Inclusion For pipe > 2" (60.3mm)

3. Ag.L>½" 13mm
(Other locations leaving
a- (in any a-
fusion Zone)
continous 12"
WL)
b Width of ISI >
Same as API 1104 Same as API 1104 b-
- 3.mm
Ag.L of ESI + ISI
c- c-
> 8% of WL
For pipe < 2" (60.3mm)
If Width > 0.5t &
a-
L > 2t
Same as API 1104 Same as API 1104
b Ag.L of ESI + ISI
- > 8% of WL
Porosity a- Size >1/8" (3mm) a-
b
Size > ¼t b-
- Same as API 1104 Same as API 1104
Scattered Por
c- c-
(refer fig)
Ø of Cluster > ½"
Cluster Porosity a- a-
(13mm)
Ag.L > ½"
b (13mm) in any
b-
- continuous 12"
WL
Same as API 1104 Same as API 1104
Single Ø of Pore
c- in Cluster Pore >
1/16" (2mm)
Hollow Bead a- L > ½ (13mm) a-
Ag.L > 2" (50mm)
b
in any continuous
-
12" WL
L > ¼" (6mm) but
Same as API 1104 Same as API 1104
separated by
c-
<50mm between
them
d
Ag.L > 8% of WL
-
Excess Reinforcement Wall Thickness
External Weld Reinforcement (mm) Wall Thickness
and Penetration (mm)
6.4 and under 1.6 mm ≤ 6 mm (1/4")
> 6 mm (1/4"),≤ 13 mm
6.4 -12.7 2.5
Excess Reinforcement
> 13 mm (1/2"), 25 mm
and Penetration Over 12.7 3
> 25 mm (1")

4. ANCE CRITERIA
B31.3 (Normal) B31.3 (Severe) Sec IX
Clik link Clik link Clik link
X X X
X X X
X X X
Depth > 1/32 "
(0.78mm) & 0.2t
(whichever is Less)
X X
Ag.L > 1.5" (38mm)
in any 6" WL
(150mm)
Not specified Not specified
X X X
Not specified Not specified X

5. Wj shall never be Wj shall never be
less than the base less than the base
metal thickness metal
Not specified
Wj = Total Joint Wj = Total Joint
Thick + Thick +
reinforcement reinforcement
Depth > 1/32" (1mm)
X Not specified
& ≤ t/4
L > 1/8" (3 mm) t upto 3/8"
L > 2t a- L > t/3 a-
(10 mm)
W > 3.125mm & t/2 W > 2.34mm & t/3 L=1/3 t for t > 3/8" (10 mm)
b- b-
(whichever is less) (whichever is less) upto 57 mm Inclusive
L = 3/4" (19 mm)
Ag.L > 4t in any 6" Ag.L > 4t in any 6"
c- c- for t > 57
WL WL
Ag.L > t in mm
a length of 12t
& distance between
d-
indication exceeds 6L
where "L" is the longest
indication

6. 20% of t or 1/8" (3 mm)
L > 2t a- L > t/3 a-
whichever is less
W > 3/32" (2.5mm) No.of indication shall not
W > 1/8" & t/2
b- & t/3 (whichever is b- be 12 in any 6" WL if t <
(whichever is less)
less) 1/8" (3 mm)
Ag.L > 4t in any 6" Ag.L < t in any 12" for t >1/8" (3 mm) refer
c- c-
WL WL chart in Appendix I
Same as >2" Same as >2"
(60.3mm) (60.3mm)
Max Ø>¼ t or
For t≤ 6mm same as 20% of t or 1/8" (3 mm)
a- 3.90mm a-
Sec.VIII Division D whichever is less
(whichever is less)
Ø>1/3t or 6mm if
No.of indication shall not
t> 6mm 1.5 times indication
b- b- be 12 in any 6" WL if t <
Sec.VIII Division D separated by more
1/8" (3 mm)
than 1"
Ø > 9.5mm if t > for t >1/8" (3 mm) refer
c- c-
2" chart in Appendix I
For t≤ 6mm same as Size > 1" or 2t
a-
B31.3(S) (whichever is less)
t> 6mm 1.5 times of Ag.L > 1" in any 6"
b- a- Refer chart in Appendix I
B31.3 (S) WL
Max Ø>¼ t or
For t≤ 6mm same as 20% of t or 1/8" (3 mm)
a- 3.90mm a-
B31.3(S) whichever is less
(whichever is less)
Ø>1/3t or 6mm if
No.of indication shall not
t> 6mm 1.5 times of indication
b- b- be 12 in any 6" WL if t <
B31.3 (S) separated by more
1/8" (3 mm)
than 1"
Ag.L > 1" in any 6" for t >1/8" (3 mm) refer
c- c-
WL chart in Appendix I
External Weld
Wall Thickness
reinforcement
≤ 6 mm (1/4") ≤ 1.6 mm (1/16")
> 6 mm (1/4"),≤ 13 mm
≤ 3 mm (1/8")
(1/2")
> 13 mm (1/2"), 25 mm
≤ 4 mm (5/32")
(1")
> 25 mm (1") ≤ 5 mm (3/16")

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