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

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MoReSo

Mechanical
Joined
Apr 16, 2013
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21
Location
CA
Does anyone know what the restriction is for "sum1=V+Nb+Ti" and "sum2=Cr+Mo+Cu+Ni" in line pipe for sour service?
 
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


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

 
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