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Summary

IRP 1 is now available for final 30-day industry review. This update reflects a limited-scope review of IRP 1 review of Section 1.9 (Drill String Design and Metallurgy) to modernize drill pipe grade specifications and align with current industry standards. Drill pipe grade specifications were substantially revised to incorporate higher-strength grades now widely available from manufacturers (e.g. SS110, SS125, and SS135), with additional expectations for material properties, verification, and engineering assessment. 

Revisions are intended to clarify expectations and reduce ambiguity without significantly changing the overall intent of the IRP. 

To participate in the review, complete the feedback form with your comments and submit the form to: [email protected].

Feedback deadline: November 30, 2026

Developer: DACC
Sponsor Organization: CAPP
Current Status: Out for 30-day industry review ending November 30. 

Overview

This update reflects a targeted review of Section 1.9 (Drill String Design and Metallurgy) to modernize drill pipe grade specifications and align with current industry standards. Drill pipe grade specifications were substantially revised to incorporate higher-strength grades now widely available from manufacturers (e.g. SS110, SS125, and SS135), with additional expectations for material properties, verification, and engineering assessment.

Section 1.9 was updated to align with current editions of NACE standards and reflects advancements in sour service material selection and performance. These changes are intended to:

  • Incorporate higher-strength drill pipe grades now available in the industry
  • Align material requirements with updated NACE guidance (e.g., TM0177 and MR0175/ISO 15156)
  • Improve clarity around mechanical, chemical, and performance requirements and
  • Support risk-based material selection and engineering evaluation for sour service applications.
  • A detailed list of revisions is provided in Appendix A, Table 25: Edition 6.2 Revisions.

Have feedback or questions?

We welcome your input. Send your comments to [email protected]

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