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.
The Importance of Seal Welding Vent Holes according to ASME B31.3 Introduction The question pertains to the seal welding of vent holes on saddle plates that have been welded to the pipe. The vent holes were provided according to ASME B31.3 and were used as a protective shield to the pipe. However, there is now […]
NACE Fusion Boundary Introduction An inquiry was made regarding the correct interpretation of NACE MR0175/ISO 15156-2, 7.3.3.3 regarding the placement of hardness impressions. Specifically, when welding dissimilar metals, such as corrosion-resistant overlays on low-alloy steels, does the phrase “”as close as possible to, but no more than 1mm from, the fusion boundary”” mean that the […]
NACE Hardness Acceptance Criteria If you’re looking for information on NACE hardness acceptance criteria, you’ve come to the right place. In this article, we’ll provide you with a detailed overview of what NACE hardness acceptance criteria are, why they’re important, and how they’re used in various industries. What are NACE Hardness Acceptance Criteria? NACE hardness […]
NACE HIC and ISO 15156/ NACE MR0175 Compliance Overview The following text is a code or shortcode for use on a website. It discusses a question related to the purchase of steel that complies with ANSI/NACE MR0175/ISO 15156-2 and whether it includes resistance to HIC. The response clarifies that ISO 15156/NACE MR0175 covers all cracking […]
Understanding NACE HIC: Qualification and Selection of Steels for Resistance to Cracking This appears to be a shortcode intended for use on a website. It includes two separate questions regarding hydrogen-induced cracking. Question 1: Does Clause 7.1.1 Apply to Other Forms of Cracking? Clause 7 of the NACE MR standard addresses the qualification and selection […]
NACE MR0175 Compliance: Understanding the Minimum and Maximum Partial Pressure of H₂S If you’re in the oil and gas production industry, you’re likely familiar with NACE MR0175, an international standard for metallic materials. But do you know the minimum and maximum partial pressure of H₂S required for compliance? Let’s explore. The Sour Service H₂S Partial […]
Question about NACE MR0175 Clause 7.1.2 and SSC Resistant Steels This webpage includes a question related to sub-clause 7.1.2 of NACE MR0175, which states that SSC Resistant Steels can be selected using A.2. for partial pressures equal to or above 0.3 kPa (0.05 psi). The question includes several sub-parts regarding the use of the suggested […]
Is There a Maximum Partial Pressure Limit for Carbon Steels in NACE MR0175/ISO 15156-2 Section 7.1.2 and A.2? The Question This text includes a question regarding the partial pressure limitation for carbon steels in NACE MR0175/ISO 15156-2 section 7.1.2 and A.2. The question wants to know if there is a maximum partial pressure limit for […]
Ambiguity in NACE MR0175/ISO 15156-2:2009 (E) Regarding SCC Regions of Environmental Severity This webpage addresses a question about the contradictory statements in Paragraph 7.2.1.2 and Paragraph 8 of NACE MR0175/ISO 15156-2:2009 (E) regarding the evaluation of carbon and low alloy steels for their resistance to HIC/SWC and SCC regions of environmental severity. The question seeks […]
ISO 15156-2 Note 1: Understanding Discontinuities in H₂S Partial Pressure Measurements This webpage discusses a question regarding a sentence in Note 1 of Figure 1 in ISO 15156-2, which states that discontinuities below 0.3 kPa (0.05 psi) and above 1 MPa (150 psi) partial pressure H₂S reflect uncertainty regarding the measurement of H₂S partial pressure […]
