T-95 vs C110

[metboss]

Good day all!

Below is the excerpt from API 5CT (9th edition, latest)

C110 material:

"Particular attention should be given to the application of Grade C110 in ISO 15156-2 or ANSI-NACE MR0175/ISO 15156-2 SSC Regions 2 or 3, as this material is not suitable for all sour (hydrogen sulfide-containing) service applications".

My questions are here
"can C110 material be used for SSC Regions 2 and 3 ?
If not, why API 5CT recommends this material for sour service with NACE TM0177 testing ??
Is C110 listed in NACE MR0175

Regards

 

[metengr]

Yes. I would post this in the forum below

forum338

 

[SJones]

C110 is addressed, but not listed, in ISO 15156-2, A.2.2.3 and Table A.3. You will note the heat treatment, yield strength, hardness and minimum service temperature restrictions. The problem that you face will be trying to remain simultaneously within all of the restrictions, particularly the minimum allowed temperature of operation if a well gets shut in. Canadian Industry Recommended Practice (IRP), Volume 2 offers some further advice on validation and quality control requirements that might be applied.

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.