API 5L - 2012 L245R or BR / L245N or BN

[philip thomas]

hello all, this is my first thread so i hope it is in the right place,
looking at the two grades of API 5L - 2012 can someone help me identify what the letters B or BR AND N or BN stand for please,or is there a page online i can find the answer and list of all other letters used in API 5L ? so far i cannot find anywhere.
thank you

 

[Metalero]

the letter B refers to the degree of the pipe (metric L245), the next one in the list is the X42 (metric L290) and is designated according to the SMYS -> 42ksi or 290MPa.

the letter that follows R or N refers to the condition in which the pipe is delivered: R = as rolled or N = Normalized

the other letters contained in the version are M = thermomechanical treatment; Q = Quenched and tempered

And if the pipe meets the additional requirements of Annex H for Sour Service, an S is added.

API 5L BNS is a grade B pipe, normalized and meets the requirements of Annex H for Sour Service.

L245R or BR = pipe whit SMYS=245MPa(metric) as-rolled.
L245N or BN = pipe whit SMYS=245MPa(metric) normalized.

 

[philip thomas]

thank you MarriolaV that's a great help

 

[Metalero]

You’re welcome.