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.
Question: Can postweld heat treatment be skipped for weld overlays on low-alloy ferritic steel valves? This webpage features a question regarding weld overlays applied to low-alloy ferritic steel valves using Inconel 625 filler metal with SAW process. The valve is used on wet gas wellhead production platform with operating temperatures at 93°C, operating pressure of […]
Questions about NACE MR0175/ISO 15156-2 Annex A.2.3.2.1 What are Shear Blades? When it comes to NACE MR0175, the term “”Shear Blades”” is not defined. Does User Responsibility Make Shear Blades Compliant with MR0175? Blowout preventer shear blades have permitted exclusions in Part 2 Table 1 and Part 3 Table 1. However, the cautionary note in […]
Welding Procedures and Qualifications for NACE MR0175/ISO 15156 Compliance Is NACE TM0177 Required for Welds Qualified to NACE MR0175? If a weld is qualified to NACE MR0175, the question arises whether NACE TM0177 is also necessary. According to NACE MR0175/ISO 15156, Part 2, and NACE TM0177, if the welding procedures (WPSs) are already qualified in […]
What is the Required Sulfur Content to Meet NACE MR0175 and HIC Resistance Regulations? This webpage addresses a common question in the oil and gas industry regarding the sulfur content required to meet NACE MR0175 and HIC resistance regulations. While there are no specific requirements regarding the control of any elements to prevent HIC, some […]
Specifying Sulphur Limits for Carbon and Low Alloy Steels to Comply with NACE MR0175/ISO 15156 At OGC Energy, we specialize in assisting clients with specifying sulphur limits for carbon and low alloy steels in order to ensure compliance with NACE MR0175/ISO 15156. Section 8 of NACE MR0175/ISO 15156-2 emphasizes the significance of steel chemistry and […]
Can a Part with a Welded and Post-Weld Heat Treated Surface be Accepted According to NACE MR0175/ISO 15156-2 Table A.1 with a Measured Hardness of 243 Brinell? If you’re wondering whether a part with a welded and post-weld heat treated surface can be accepted according to Table A.1 of NACE MR0175/ISO 15156-2, given a measured […]
Defining “”Qualification”” in NACE MR0175/ISO 15156-2 This page addresses the question of what “”qualification”” means in the context of NACE MR0175/ISO 15156-2. Specifically, the asker wonders if the term only applies to new materials not listed in Table A.2. Table A.2 and Paragraph A.2.1 The answer is that Table A.2 gives examples of materials that […]
Title: Does “”Hot Rolled”” Apply to Butt Weld Fittings? | NACE MR0175/ISO 15156-2 Introduction This page addresses a common question about the term “”hot rolled”” as used in Paragraph A.2.1.2 of NACE MR0175/ISO 15156-2. Specifically, we’ll explore whether this term only pertains to sheet or plate material, or if it can also be applied to […]
Introduction This page addresses a question regarding certification of forgings to NACE MR0175. The company has been pressured by customers to certify their forgings without normalizing, as they claim their competition (including imports) do the same. The company uses gas-fired furnaces and induction heaters to heat the forgings to 2,300 to 2,350°F before being forged […]
Is a Forged ASTM A105 Class 150# Flange in Non-Normalized Condition in Accordance with NACE MR0175 and NACE MR0103? This page addresses a common question in the oil and gas industry. The answer is not straightforward, but we’ll do our best to explain. First, let’s define the terms: NACE MR0175: A standard that specifies the […]
