Acceptance criteria for inclusions as per API 5L / ASTM A106

[NDTInnova]

We obtained the following results from a ring sample of API 5L/ASTM A106 CS pipe:

ASTM E45 Inclusion Rating

Method A: Inclusion Content
A 160mm2 specimen was polished through alumina and examined unetched at 100x.
The worst field was compared and rated to ASTM E45, Plate I-r.
THIN HEAVY
A(Sulfide) ½ ½
B(Alumina) ½ 0
C(Silicate) ½ 4
D(Globular Oxide) ½ 0

I am enclosing section 7.8.10 of API 5L 43rd edition (pipe was manufactured under this edition not 44th). Can anyone tell me if we can correlate this results to this acceptance criteria? should this specimen be consired a reject?

By the way we do not know what the application of this material might be by the end user.

Thanks!

 

[metengr]

NDTInnova;
Under ASTM A 106, there is no provision for evaluation of inclusions for pipe supplied under this specification.

For General Requirements ASTM A 530, which takes precedence over A 106, there is a requirement for no laminations, but inclusion size and density are not addressed. Ultrasonic testing would be used to evaluate laminations for acceptability.

Bottom line is inclusion rating only applies to end user specifications (which could go above and beyond the ASTM material specification), meaning customer end use drives the final acceptance requirements.

 

[NDTInnova]

Thanks for your insight Metengr!!!

 

[NDTInnova]

Buy the way how do I close this thread?