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.
Understanding NACE Standard MR0175-2003 The Two Highly Alloyed Austenitic Stainless Steel Families This page addresses an inquiry regarding NACE Standard MR0175-2003, which has two highly alloyed austenitic stainless steel families. Paragraph 4.4 covers the family with Ni% + 2 Mo% >30 (and Mo>=2%), while Paragraph 4.5 covers the family with PREN >40. Both families have […]
Understanding NACE MR0175 and UNS N08825 If you’re wondering about the types in Table A.12 of NACE MR0175 that cover UNS N08825, you’re in the right place. This page will provide you with the information you need. Types of UNS N08825 in Table A.12 According to ISO 15156 Maintenance Panel Inquiry #2015-08, UNS N08825 meets […]
Is UNS N08825 Resistant to Sulfur? Introduction This page addresses an inquiry about whether UNS N08825 is resistant to sulfur without limitations on pH, temperature, H₂S partial pressure, and chloride. The remarks column in Table A.13 states that some combinations of values for these parameters might not be acceptable, and the inquiry seeks clarification on […]
NACE MR0175 Interpretation for Nickel-Based Alloys: Alloy 20 (UNS N08020) Introduction This page addresses an inquiry seeking a definitive interpretation of NACE MR0175 regarding nickel-based alloys. The inquiry specifically pertains to alloy 20 (UNS N08020), which has a Mo range of 2.0-3.0 according to ASTM/AMS/UNS composition listed in Table D3 on page 65. Background Section […]
Compliance of NiMo 16 Cr 16 Ti alloy with NACE MR0175/ISO 15156:2009 Part 3 Annex A Table A.12 This page addresses an inquiry regarding the compliance of a highly corrosion-resistant NiMo 16 Cr 16 Ti alloy produced according to German TUV Specification 429 09.2002 Material No 2.4610 with the requirements for materials Types 4b and […]
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 […]
Maximum Hardness Limit for ISO 11960 L-80 Type 13 Cr Tubing Introduction This page addresses an inquiry regarding the maximum hardness limit for ISO 11960 L-80 Type 13 Cr tubing used as a downhole tubular component, packer, and other subsurface equipment in accordance with NACE MR0175/ISO 15156. The Inquiry The question asks whether the maximum […]
Understanding the Separation of Tubing and Subsurface Equipment in NACE MR0175/ISO 15156-3 Introduction This page provides an answer to an inquiry seeking clarification on the separation of tubing and subsurface equipment in Tables A.19 and A.20 of NACE MR0175/ISO 15156-3, and the recommendation of certain materials for subsurface equipment under certain conditions. The Role of […]
ISO 15156-3, A.7.3: Metallographic Examination of Materials This page provides answers to inquiries related to ISO 15156-3, A.7.3, specifically on the classification and quantification of closely spaced spheroidal precipitates, and the suitable practices or standards for this quantification. For NACE MR0175/ISO 15156-3, A.7.3, the equipment user and manufacturer are responsible for setting the quantitative standard […]
Can UNS S17400 Material be Used for Hangers in Sour Service? Introduction This page provides an answer to an inquiry regarding the use of UNS S17400 material for hangers in a sour environment in accordance with NACE MR0175/ISO 15156-3 Table A.27. Definition of Hangers The inquiry raises questions about the definition of hangers and their […]
