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 on NACE spec MR0175-3, Table D.3 Inco 625 Alloy Chemistry This page presents a question related to the interpretation of NACE spec MR0175-3, Table D.3 Inco 625 alloy chemistry. The inquiry seeks clarification on whether the specified Nb max weight % 3.15 to 4.15 in the table is a typo, as industry standard spec […]
Hardness Testing Survey Requirement for Solution Heat-Treated Nickel-Based Alloys Welded with Solid-Solution Nickel-Based Weld Metal Introduction This page addresses a common question related to the requirement for hardness testing survey as part of welding procedure qualification for solution heat-treated nickel-based alloys welded with solid-solution nickel-based weld metal, as per NACE MR0175/ISO 15156 Part 3, Appendix […]
Can Any Ferritic Stainless Steel Be Used Under the Conditions of Table A.17? Keywords: Ferritic Stainless Steel, NACE MR0175/ISO 15156-3, Table A.17, Table D.5 This page relates to a question regarding NACE MR0175/ISO 15156-3 section A.5.1 and Table D.5, which refer to “”some alloys of this type”” for ferritic stainless steels. The inquiry asks if […]
Can Free-Machining Grades Be Used in Ferritic Stainless Steels Under NACE MR0175/ISO 15156-3? Introduction This page addresses a common question regarding the use of free-machining grades in ferritic stainless steels under NACE MR0175/ISO 15156-3. The inquiry points out that sections A.2.1, A.3.1, and A.6.1 specifically forbid the use of free-machining grades in their respective steels, […]
Currently Alloy 600 (UNS N06600) is not listed in NACE MR0175. Question: Your name was given to me as someone that might be able to help sort out an issue that was raised by one of my co-workers. At one point many years ago, alloy 600 (UNS N06600) was included in MR0175 as a specific alloy […]
Permissibility of UNS S20910 in Hot Worked Conditions under NACE MR0175 This page features a question regarding the permissibility of UNS S20910 in hot worked conditions under NACE MR0175. Understanding Table A.3 The answer provided states that Table A.3 allows cold working up to 35 HRC, provided that the material undergoes a preceding solution annealing […]
Table A.6 in NACE MR0175/ISO 15156-3: What Instruments Are Included? This page features an inquiry about Table A.6 in NACE MR0175/ISO 15156-3, which defines material and environmental limits for instrumentation and control devices. The Question The question pertains to whether certain instruments, including pressure gauges, diaphragm seals, electronic pressure transmitters, electric and mechanical temperature measuring […]
Permissibility of Using Forging Grade Equivalent of J 93254 in NACE MR0175 This page features an inquiry regarding the permissibility of using the forging grade equivalent of J 93254 in NACE MR0175. The question refers to Table A-8 of NACE MR0175/ISO-15156-2003, which specifies the environmental and material limits for highly alloyed austenitic steels used in […]
Understanding Materials Type 3a and 3b in ASME B31.3 and NACE MR0175 If you’re working with a pipe skid system that requires compliance with ASME B31.3 and NACE MR0175, you may have come across an inquiry related to the use of materials. Specifically, the inquiry refers to Table A.8 and materials type 3a and 3b, […]
Clarification on the meaning of a sentence in MR0175-2003 Introduction This page addresses an inquiry about the meaning of a sentence in Paragraph 4.4 and 10.2.1 of MR0175-2003. The inquiry seeks clarification on whether the statement means there are two qualifying groups, one containing materials with N% + 2 Mo% >30 and the other containing […]
