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.
Is UNS J91153 Compliant with NACE MR0175/ISO 15156-3? Introduction This page addresses an inquiry regarding the compliance of UNS J91153 with NACE MR0175/ISO 15156-3. The inquiry relates to Table A.18 in Part 3, A.6.2 of the standard, which lists cast and wrought equivalents for various alloys. The Question The question asks whether UNS J91153 is […]
Inconsistency between Table A.18 and A.23 This page addresses an inconsistency between Table A.18 and A.23 in NACE MR0175/ISO 15156-3, specifically relating to the use of martensitic stainless steels in different types of equipment and components. Clarification on the Meaning of “”Any Equipment or Component”” The question asks for clarification on the meaning of “”any […]
Meeting NACE MR0175 Requirements: Is 22 HRC the Only Requirement? This page includes an embedded video from Vimeo, in which Ivan Gutierrez clarifies whether a maximum hardness of 22 HRC is the only requirement to meet NACE MR0175. Understanding NACE MR0175 Requirements The answer states that a maximum hardness of 22 HRC is one of […]
Can HV 500g (microhardness) Testing Be Used for NACE Applications for Wps Qualification? Although Paragraph 7.3.3.2 of NACE MR0175/ISO 15156 Part 2 notes that hardness testing should typically be carried out using HV 10kg or HV 5kg (which is our usual practice), the testing was done with HV 500g on CSA Z245.1 Grade 359 pipe […]
What Grade of Stainless Steel is Suitable for a Tubing Hanger in an Environment with pH
Sulfur-resistant Alloys for Different Temperatures This page provides an answer to an inquiry regarding the suitability of certain alloys in the presence of sulfur at different temperatures, based on NACE MR0175/ISO 15156-3, Sub-clause A.4.2, Table A.14. Inquiry Details The inquiry asks whether there are any sulfur-resistant alloys between the temperature range of 425°F and 300°F, […]
Can precipitation-hardened austenitic steel UNS S66286 be used at higher temperatures in the absence of chlorides? Answer: This inquiry pertains to NACE MR0175/ISO 15156-3 A.8, Table A.26, and the reference cited is ISO 15156 Maintenance Panel Inquiry #2005-02 Qa. According to Table A.26 in NACE MR0175/ISO 15156-3, the temperature limit for UNS S66286 is restricted […]
Applicability of NACE MR0175/ISO 15156-3 Table A.26 to Grade 660 Material Used in Subsea Bolting Applications Introduction This page provides an answer to an inquiry regarding the applicability of NACE MR0175/ISO 15156-3 Table A.26 to Grade 660 material used in subsea bolting applications external to the production wellbore environment. Inquiry The inquiry asks whether Table […]
Compliance of NACE-Approved Control Valves in the Oil and Gas Industry This page addresses an inquiry about the compliance of NACE-approved control valves in the oil and gas industry. The internal components of these valves include a part made from UNS S17400 (17-4 PH), which is subject to the hardness limit of 33 HRC described […]
ST 17-4 PH UNS S17400 Material for NACE Applications: Which Table Applies to Surface Safety Relief Valves? This page provides guidance on the use of SST 17-4 PH UNS S17400 material for NACE applications, specifically for surface safety relief valves with internal components made of this material. The inquiry seeks clarification on which table from […]
