Are API 5L X70 AND 5LX-X70 the same material?

[Hansito]

Colleagues,

My stress program under B31.8 has as one of the piping material the option 5LX-70 with Yield 48263.3 N/cm2 and Ultimate 56537.02 N/cm2.

If I change the applicable coade to B31.3 (there is an internal controversy about the applicable code on this project) the only similar option is API-5L-X70, with the same Yield and Ultimate.

Can anybody tell me if they are they are really equivalent or if they have important differences regarding to the the applicble coade in terms of buying the material in advance?

Regards,
Hansito

 

[JohnGP]

Hansito,

Might I be so bold to suggest that there is a (minor) typo in the stress program. API 5L is the material specification. It has a number of grades, one of which is X70. The yield and ultimate stress values that you quote are the "hard" conversion to metric numbers from the US Customary units in the specification, and not the metric values of 483MPa and 565MPa included there for that grade (and PSL 1).

John

 

[Hansito]

Thanks John,

You are certainly right. I'm not an expert in materials, I set a lot of searches on the 5L-X70 and there is nothing.
May be is the clasical old computer definition of no more 6 strings for a variable name.

Thanks
Hansito

 

[salmon2]

I think 5LX-70 means API 5L X-70. I am not aware of standard named by 5LX.