Development of the NACE “MR-01-75” and NACE “TM-01-77” Standards, Part II: Accelerated Material Qualification Testing in Sour Environments at Near Atmospheric Pressure

Author:

Sherar Brent W.A.1,Caldwell Eric2,Ellis Peter F.1,Kane Russell D.3

Affiliation:

1. *Honeywell Connected Enterprise, 11201 Greens Crossing Blvd., Houston, Texas 77067.

2. **GATE Energy, 13501 Katy Freeway Suite 3300, Houston, Texas 77079.

3. ***iCorrosion LLC, 1221 Willard Street, Houston, Texas 77006.

Abstract

This paper is Part II of a two-part series intended to narrate the history, some of which has been forgotten over time, leading up to the publication of the first Material Requirement (MR-01-75) standard prepared by NACE and its subsequent auxiliary standards. Previously, Part I described the field observations and discussed the metallurgical factors that were being investigated by the historical NACE T-1B and 1F committees to support the development of a sour service materials standard. In Part II, we focus on the rationale behind the use of accelerated laboratory test procedures designed to differentiate metallurgical behavior in sour environments. The original sulfide stress cracking test methodologies would later be codified as a Test Method in NACE TM-01-77 (1977). A review of the historical events culminating in NACE MR-01-75 and NACE TM-01-77 provides a technical basis for the historical use of NACE solution A (5 wt% NaCl + 0.5 wt% acetic acid) to evaluate metallurgical factors, and the origins of several common SSC NACE Test Methods still used today: Methods A (tensile), B (three-point bent beam), and C (C-ring). The accelerated laboratory test results, in combination with parallel field trials (performed in advance of the first NACE MR-01-75 publication), supported the ≤22 Rockwell C (22 HRC) hardness limit for carbon and low alloy steels in sour environments containing ≥0.05 psia H2S partial pressure. As the oil and gas industry continues to innovate and mature, it was imperative to maintain knowledge of the origins of the NACE MR-01-75 and TM-01-77 standards and their intended purposes.

Publisher

Association for Materials Protection and Performance (AMPP)

Subject

General Materials Science,General Chemical Engineering,General Chemistry

Reference63 articles.

1. Development of the NACE MR-01-75 and NACE TM-01-77 Standards, Part I: Field Observations and Metallurgical Factors

2. Test Method: Testing of Metals for Resistance to Sulfide Stress Cracking at Ambient Temperature;NACE Standard TM-01-77,1977

3. Materials for Valves for Resistance to Sulfide Stress Cracking in Production and Pipeline Service;NACE Standard MR-01-75,1975

4. Sour or Not Sour? That Is the Question: A Review of the NACE “Sour Limit”—Evolution and Implications for Modern Oil & Gas Production;Caldwell,2021

5. Petroleum, Petrochemical, and Natural Gas Industries—Materials for Use in H2S-Containing Environments in Oil and Gas Production—Part 2: Cracking-Resistant Carbon and Low-Alloy Steels, and the Use of Cast Irons;ISO 15156-2:2020,2020

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