| Test | Frequency | Acceptance | |------|-----------|-------------| | Pull-off bond | 1 per 100 m² | ≥ 1.5 MPa | | Thickness (magnetic) | 5 per 10 m² | 80–120% of spec | | Porosity (ferroxyl) | 1 per 50 m² | ≤ 3 blue spots per 100 cm² | | Continuity | 100% of anode segments | ≤ 2 ohms |
To appreciate the 2021 update, we must revisit history. In the 1970s, catastrophic failures in sour oil fields led to the creation of NACE MR0175 ("Sulfide Stress Cracking Resistant Metallic Materials for Oilfield Equipment"). For decades, this standard was the "golden rule" for any metal touching wet H₂S. nace sp0170 pdf 2021
In 2003, the standard was restructured into two parts: By 2021, the need for a cohesive update was clear
By 2021, the need for a cohesive update was clear. The industry had moved toward higher-strength materials, deeper wells, and more extreme pressure/temperature (P/T) regimes. The NACE SP0170 PDF 2021 was released to address these gaps, clarify ambiguities, and harmonize with updated ISO standards. nace sp0170 pdf 2021
The PDF includes mandatory requirements for:
If you're looking for the 2021 version of this document in PDF format, here are some steps you can take:
| Test | Frequency | Acceptance | |------|-----------|-------------| | Pull-off bond | 1 per 100 m² | ≥ 1.5 MPa | | Thickness (magnetic) | 5 per 10 m² | 80–120% of spec | | Porosity (ferroxyl) | 1 per 50 m² | ≤ 3 blue spots per 100 cm² | | Continuity | 100% of anode segments | ≤ 2 ohms |
To appreciate the 2021 update, we must revisit history. In the 1970s, catastrophic failures in sour oil fields led to the creation of NACE MR0175 ("Sulfide Stress Cracking Resistant Metallic Materials for Oilfield Equipment"). For decades, this standard was the "golden rule" for any metal touching wet H₂S.
In 2003, the standard was restructured into two parts:
By 2021, the need for a cohesive update was clear. The industry had moved toward higher-strength materials, deeper wells, and more extreme pressure/temperature (P/T) regimes. The NACE SP0170 PDF 2021 was released to address these gaps, clarify ambiguities, and harmonize with updated ISO standards.
The PDF includes mandatory requirements for:
If you're looking for the 2021 version of this document in PDF format, here are some steps you can take: