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:

  • Corrosion in offshore industry
  • Downhole corrosion
  • Materials Selection
  • ANSI/NACE MR0175 / ISO 15156
  • H₂S

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.

  • 211.

    Hardness Requirements and Methods in NACE MR0175

    Understanding NACE MR0175 Hardness Requirements When it comes to operating in H₂S-containing environments, it’s important to follow the guidelines set forth in NACE MR0175. This comprehensive standard outlines requirements for equipment, materials, and processes used in these environments to ensure safety and reliability. Is 22hrc Enough to Meet Nace Mr0175? One of the hardness requirements […]

    Read more
  • 212.

    How to use NORSOK M-506 Edition 3: 2017 to calculate corrosion rate?

    Calculate CO₂ Corrosion Rates with NORSOK M506 Edition 3: 2017 If you need to calculate CO₂ corrosion rates, NORSOK M506 Edition 3: 2017 is an industry-recommended practice for hydrocarbon production and process systems. It’s fitted to much of the same lab data as the De Waard-Milliams model, with additional experimental data at 100°C to 150°C. […]

    Read more
  • 213.

    Acceptability of HV 500g Testing for NACE WPS Qualification

    Can HV 500g (microhardness) Testing Be Used for NACE Applications for Wps Qualification? Although Paragraph 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 […]

    Read more
  • 214.

    What are the NACE MR0175 requirements for risers (choke, kill and booster) lines?

    The Importance of Hardness Requirement in Producing Pipes and Weldments for Drilling Riser P-Lines Introduction The question pertains to item A. of ISO 15156-2 and whether the relaxation of the hardness requirement from HRC 22 to HRC 26 would be helpful in producing pipes and weldments using AISI 4130 tubes in the quenched and tempered […]

    Read more
  • 215.

    The NACE MR0175 requirements for shear rams

    Understanding NACE MR0175/ISO 15156-2 Requirements for Cr-Mo, Low-Alloy Steel Rams The inquiry is regarding the title of Paragraph A. in NACE MR0175/ISO 15156-2, “Shear rams,” which permits the use of rams made from quenched and tempered, Cr-Mo, low-alloy steels up to a maximum hardness of 26 HRC provided that the composition and heat treatment are […]

    Read more
  • 216.

    Non-ideal gas behavoir, HPHT wells and NACE MR0175 – partial pressure of H₂S

    The Meaning of “May” in NACE MR0175/ISO 15156, Part 2, Annex C, Section C.1 Introduction The question pertains to whether the word “may” in NACE MR0175/ISO 15156, Part 2, Annex C, Section C.1 permits other methods for calculating partial pressure, such as incorporating the effects of non-ideal gas behavior, for determining material selection. The Answer […]

    Read more
  • 217.

    Is there a NACE office available in Italy or in other European countries?

    Is There a NACE Office in Italy or Other European Countries? If you’re looking for a NACE office in Europe, all inquiries should be directed to the ISO Maintenance NACE Headquarters in Houston, Texas (Maintenance.Panel@nace.org). The Maintenance Panel is made up of members from around the world and can provide you with the information you […]

    Read more
  • 218.

    Crude oil storage, does it have to comply with NACE MR0175?

    Crude Oil Storage and Handling Facilities: Understanding NACE MR0175/ISO 15156 Inquiry #2009-14 The Inquiry The question is about crude oil storage and handling facilities operating at a total absolute pressure below 0.45 MPa. The inquiry seeks clarification on whether the paragraph in question includes only dead oil with no gas in equilibrium, and if gas […]

    Read more
  • 219.

    Produced water handling facilities and NACE MR0175

    Water Handling NACE: Understanding Corrosion in Low-Pressure Facilities Introduction The question pertains to water handling facilities operating at pressures below 0.45 MPa, and the inquiry seeks clarification on whether this means that the possibility of corrosion is low enough to be excluded from standard requirements, or if the consequences of any problem are minimal. The […]

    Read more
  • 220.

    Is ISO 9001/9002 required to supply NACE MR0175 equipment and material?

    ISO 9001 NACE: What You Need to Know About Compliance Introduction If you’re a U.S. buyer looking to have equipment manufactured in compliance with ISO 15156, you may also require suppliers to be ISO registered, specifically having ISO 9002 (quality standard) in place. However, you may be wondering whether ISO 9002 is a requirement for […]

    Read more

Let’s talk about your next project