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.
Inconel X750 (UNS N07750) and NACE MR0175 Inconel X750 (UNS N07750) is a precipitation-hardened nickel-based alloy listed in NACE MR0175 / ISO 151656 part 3 tables A.35 and A.36 as a valid material for non-pressure containing components and springs. This material was previously approved as a nickel-chromium alloy in NACE MR0175-2002 and is still listed […]
Based on NACE Paper 03133, it was found that UNS N07750 failed due to sensitization of the material when exposed to a temperature of around 2000°F and cooled slowly. This was attributed to the lack of defined quality control procedures, especially the definition of solution heat treatment. However, Table A.27 of NACE MR0175-3 now lists […]
Using ISO 15156-3:2015 Guidelines for Threading Threads produced using a machine-cutting process are acceptable, and threads produced by cold forming (rolling) are acceptable on CRAs and other alloys if the material and the limits of its application otherwise comply with this part of ISO 15156. But does this mean that it is generally acceptable to […]
Title: Understanding Water Handling Exclusions in ISO 15156 Introduction ISO 15156 Table 1 provides a non-exhaustive list of equipment to which this part of ISO 15156 is applicable, including permitted exclusions. Among the exclusions are “”Water-handling facilities operating at a total absolute pressure below 0.45 MPa (65 psi).”” The Fundamentals of Exclusions The exclusions are […]
Understanding ISO 15156-3 Table A.2 and Dual-Certified 316/316L Stainless Steel ISO 15156-3 Table A.2 and Cold Work Restrictions for 316L NACE Under ISO 15156-3 Table A.2, austenitic stainless steels are categorized based on their environmental limits for use in sour service. In the notes section under subheading ‘b’, which applies to grade UNS S31603 (316L) […]
Inconel 625 (UNS N06625) for Sour Service Materials: Compliance with NACE MR0175/ISO 15156 Manufacturing sour service materials with Inconel 625 (UNS N06625) requires compliance with ANSI/NACE MR0175/ISO 15156. This article discusses specific metallurgical requirements for Inconel 625 as mandated by NACE MR0175, including metallurgical conditions and hardness. Annealing Requirements for Alloy 625 NACE MR0175 mandates […]
Does NACE MR0175/ISO 15156 Specify Hardness Requirements for ASTM A350 Grade LF2 Material? Answer: NACE MR0175/ISO 15156 does not dictate the hardness requirements that may be present in other standards. The standard defines material requirements and use limits as they relate to environmental cracking in the presence of H₂S. ASTM A350 LF2 requires the hardness […]
A395 NACE: Acceptability of Ferritic Ductile Iron for Pressure-Containing Parts Question 1: Does Section A.2.4.1, part 2 (ANSI/NACE MR0175/ISO 15156-2:2015) stating “”Ferritic ductile iron in accordance with ASTM A395 is acceptable for equipment unless otherwise specified by the equipment standard”” imply that its use is acceptable for pressure-containing parts? Answer 1: ANSI/NACE MR0175/ISO 15156-2 does […]
NACE Hardness and Cold Finishing Section A.1.5.3 of ANSI/NACE MR0175/ISO 15156-3:2015 specifies that cold deformation of surfaces is acceptable if the processes used, such as burnishing, do not impart more cold work than that incidental to normal machining operations like turning, boring, rolling, threading, drilling, etc. Acceptability of Cold Finishing for Annealed Materials The question […]
Can Material S66286 Be Used According to Table A.26 of NACE MR0175/ISO 15156-3:2015? Introduction In this article, we will discuss whether Material S66286 can be used according to Table A.26 of NACE MR0175/ISO 15156-3:2015. We will also compare the heat treatment requirements of Grade 660 UNS S66286 and Grade 662 UNS S66220, as defined by […]
