Restriction for sum1 of V+Nb+Ti and sum2 of Cr+Mo+Cu+Ni 1

[MoReSo]

Does anyone know what the restriction is for "sum1=V+Nb+Ti" and "sum2=Cr+Mo+Cu+Ni" in line pipe for sour service?

 

[SJones]

In API 5L, sum 1 is less than, or equal to 0.15%. Sum 2 appears to be the additional requirement of an end user.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.

 

[MoReSo]

Thank you SJones for the answer.
moreover, I want to know that the how much more restrictive these two sums can be; this is for the reason that if they are more restrictive, we may loose many vendors as they cant supply.
I have seen 0.07=V+Nb+Ti and 0.7=Cr+Mo+Cu+Ni in European standards such as EN10216 while in API they are much wider.