In NACE MR0175, what is the API 5CT L-80 Type 13Cr hardness limit?
Maximum Hardness Limit for ISO 11960 L-80 Type 13 Cr Tubing
Introduction
This page addresses an inquiry regarding the maximum hardness limit for ISO 11960 L-80 Type 13 Cr tubing used as a downhole tubular component, packer, and other subsurface equipment in accordance with NACE MR0175/ISO 15156.
The Inquiry
The question asks whether the maximum hardness limit as specified in the latest edition of ISO 11960 is applicable for L-80 Type 13 Cr tubing, which currently specifies 23 HRC as the maximum hardness. The inquiry notes the absence of a note specifying the maximum hardness limit of L-80 Type 13 Cr tubing in NACE MR0175/ISO 15156-3, Table A.19, which lists the material as acceptable for downhole tubular components, packers, and other subsurface equipment.
The Answer
The answer provided confirms that the interpretation is correct, and notes that during the preparation of ISO 15156, unnecessary repetition of information provided in cited sources was avoided.
Conclusion
This question pertains to NACE MR0175/ISO 15156-3 A.6.2, Table A.19, and the reference cited is ISO 15156 Maintenance Panel Inquiry 2006-03.