NACE MR0175 for L80
NACE MR0175 for L80
(OP)
What's the implication of NACE MR0175/ISO 15156 on API L80?
Seems the only requirement is on hardness, max being HRC22 instead of HRC23 as specified in API 5CT?
Any other things I missed out?
Seems the only requirement is on hardness, max being HRC22 instead of HRC23 as specified in API 5CT?
Any other things I missed out?





RE: NACE MR0175 for L80
Some lack of clarity also comes from rewriting to humour the ISO people.
RE: NACE MR0175 for L80
Does that imply that L80 type 1 is accepted though hardness requirement differs slightly?
RE: NACE MR0175 for L80
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: NACE MR0175 for L80
RE: NACE MR0175 for L80
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: NACE MR0175 for L80
RE: NACE MR0175 for L80
RE: NACE MR0175 for L80
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: NACE MR0175 for L80
I am not even certain about t95. But that is my understanding.
What I was asking is if t95 is up to 26hrc then L80 is possibly up to 23 as they are defined similarly in nace if I remember correct.
RE: NACE MR0175 for L80
Let's make it simpler:
Now I have a casing/tubing material that complies to API 5CT L80, and its hardness is 22.5 HRC. Is it acceptable for all service temperatures based on NACE?
RE: NACE MR0175 for L80
Salmon2
I'm certainly no expert, it's simply a case of taking the time to read all of the specifications and their intertwined requirements. The principal issue is what hardness value is allowed for L80 Type 1 without having to perform laboratory testing. For a generic carbon or low alloy steel, the line drawn by ISO 15156-2 is 22 HRC. However, ISO 11960 allows L80 Type 1 to have a maximum hardness of 23 HRC. For T95, you will note that ISO 11960 automatically requires a sulphide stress cracking test; therefore, ISO 15156 will simply defer to the 25.4 HRC requirement of ISO 11960. Bear in mind that even though ISO 15156-2 allows 26 HRC, the manufacture will not be able to certify the material as compliant with ISO 11960 at this hardness level.
All of the above is based on ISO 11960 2004 with corrigendum and not the current 2011 version because I don't have it.
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04