RT Acceptance criteria

Radiography acceptance criteria For ASME B31.3, B31.1, API 650, ASME Sec Viii , ASME Sec iX

1. Not Acceptable
Depth < 0.2t
Cumulative length < 38 mm in any 150
mm weld length
Cumulative length < 38 mm in any 150
mm weld length

Porosity

Slag inclusion, tungsten
inclusion, or elongated
indication

Not Acceptable

Depth s Imm & 02
Cumulative length < 38 mm in any
150 mm weld length

Fort <6
Fort > 6mm, limit is 1.5 x D

mm, limit is same

Individual length < 2t
Individual width < 3 mm & < t /
Cumulative length < 4t in 150 mm
|weld length

Not Acceptable

Not Acceptable

[Acceptable up to D
[Random D = t/3 or 6 mm
Isolated D = t/4 or 4 mm
JAligned D = Total Sum of indication <
length of 12t

[Clustered D = 2t or

ichever is

ess)
tina

25 mm in length of 150 mm

Individual length <
Individual width

2. ASME Sec VII DIV
(uw-s1)

Power Piping 831.4
(para. 127.4.2)

APIG50,

Crack

Not Acceptable

Not Acceptable

Not Acceptable

LOF

Not Acceptable

Not Acceptable

Not Acceptable

LoP

Not Acceptable

Not Acceptable

Not Acceptable

Porosity

8313

8313

8313

Slag

6 mm fort up to 19 mm
v2 fort from 19 mm to 57 mm
19 mm for t over 57 mm

ASME Sec VIII UW-51

ASME Sec VIII UW-51

Undercut

Not Acceptable

Not Acceptable

Not Acceptable

Root concavity

ASMESECIX WOT,

(OW-191.1.22)

[Crack

Not Acceptable

Lor

Not Acceptable

LOP
{oot concavity

slag

3 mm fort up to 10 mm
1/3 for t over 10 mm to 57 mm

119 mm for t over 57 mm

[Cumulative length < tin any 12t weld length

Undereut

Not Acceptable

Porosity

[The maximum permissible dimension for rounded indications shall be 20% of t or 3 mm, whichever is smaller.
+ For t<3 mm, The maximum number of acceptable rounded indications shall not exceed 12 in a 150 mm weld length

For t > 3mm Maximum Dia of Rounded indication is not more than 0.8 mm

3. [The fluid handled is nonflammable, nontoxic, and not damaging to human tissues,
category D The design gage pressure does not exceed 1035 kPa (150 psi).
Fluid Service The design temperature is not greater than 186°C (366°F).

irreversible harm to persons on breathing or bodily contact, even when prompt restorative measures are taken.
category M E : eee

Fluid Service

after consideration of piping design, experience, service conditions, and location, the owner determines that the requirements

for Normal Fluid Service do not sufficiently pro

pertaini ping co

essure, or High Purity