At OGC Energy we help the energy industry with finding answers to some of their most difficult questions. We have created this section hoping that you will find answers to some of the most common questions in the following areas:
If you require technical support in metallurgy, corrosion, or welding; or if you need assistance meeting the requirements of ANSI/NACE MR0175/ISO 15156 then contact our team, we are here to help you.
NACE MR0175/ISO 15156-3 Table A.39 for Cobalt-Based Alloys: Q&A Format Limitations for UNS R30003 Springs One of the limitations for UNS R30003 as springs is that the alloy must be cold worked, age-hardened, and have a maximum hardness of 60 HRC. However, measuring hardness using HRC can be challenging due to the geometry of the […]
NACE MR0175 / ISO 15156 Standards for Impellers Manufactured with Martensitic Stainless Steel UNS S41500 This article provides information on the NACE MR0175 / ISO 15156 standards for impellers made with martensitic stainless steel UNS S41500. These standards require that impellers exhibit a threshold stress that is greater than or equal to 95% of the […]
NACE MR0175/ISO 15156-2/B4: Questions and Answers on Test Procedures for Carbon and Low-Alloy Steels Understanding the Scope of Section B4 This article provides a question-and-answer format for inquiries related to the application of NACE MR0175/ISO 15156-2/B4, which covers test procedures to evaluate the resistance of carbon and low-alloy steels to SOHIC and SZC. The first […]
Interpretation of Clause B.2.2.2 e) in Annex B of MR0175/ISO 15156-2:2015 Is it permissible to test four additional specimens to qualify a batch if two out of three specimens fail to satisfy the acceptance criteria after HIC testing of a 0.5″” plate to TM0284? The answer is yes, according to MR0175/ISO 15156-2:2015, Annex B, Clause […]
NACE Stress Relief: Clarifying Fibre Deformation Requirements in NACE MR0175/MR0103 Standards Introduction This article provides a simple question-and-answer format related to NACE MR0175/MR0103 standards. The question is about the reference in NACE MR0175 part 2 Annex A section A.2.1.2 to fibre deformation greater than 5%. The question seeks clarification on whether it is referring to […]
NACE Carbon Steel: Understanding ISO 15156-2 Annex A.2.1.4 Introduction Are you confused about the definition of “”carbon manganese steel”” in ISO 15156-2 Annex A.2.1.4? You’re not alone. In this article, we’ll provide a simple question-and-answer format to help clarify this important topic. What Is Carbon Manganese Steel? Carbon manganese steel is not explicitly defined in […]
NACE HAZ Duplex: Understanding Welding Qualification Requirements Introduction If you’re working with duplex stainless steels, it’s essential to understand the welding qualification requirements outlined in ISO 15156/NACE MR0175 part 3, A.7.3. In this article, we’ll answer some common questions related to welding qualification and provide information on how OGC Energy can help you meet NACE […]
NACE MR0175/ISO 15156 Part 2/Annex A: Q&A on Cr-Mo Low-Alloy Steels This article provides valuable information in a question-and-answer format related to NACE MR0175/ISO 15156 part 2/Annex A on the acceptability of Cr-Mo low-alloy steels for specific hardness and SMYS grades, and SSC resistance testing. Do the Requirements in A.2.2.3.2 and A.2.2.3.3 Apply Only to […]
NACE MR0175 Material Restrictions for Sour Services: Q&A Why Do Materials with Similar Chemical Composition Have Different Limits for Specific Sour Service Conditions? This article presents a question-and-answer format related to material restrictions for sour services under NACE MR0175/ISO 15156-3/A.3.2. The question seeks clarification on why materials with similar chemical composition have different limits for […]
NACE and NACE MR0175 Standards This article provides information on NACE and NACE MR0175 standards. NACE is the National Association of Corrosion Engineers and publishes many documents related to corrosion control, including NACE MR0175 which provides the requirements for metallic materials exposed to H₂S in oil and gas production environments. Requirements for Metallic Materials NACE […]
