Quote Originally Posted by hazel-e View Post
hi

i want to ask about the differencee betwin API 5L X70 PSL1 and API 5L X70 PSL2 ?? No chemical diffence but mechanical ( stress value).

regards
Hazel-e,

API 5L is a specification (a "spec" as we say) for line pipe.
In that spec, two "Product Specification Levels" (PSL) are presented PSL1 and PSL2.

PSL2 is a more stringent and much more demanding than PSL1 (less tolerance, no repairs allowed, much more certificates,...etc ) and you can see the difference in Appendix J of the Spec.

And even in terms of Chemical Composition , PSL1 and PSL2 might be different even for the same grade (e.g. X70) since the maximum and minimum limits for compositions are not the same.

I hope this helps...