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.

  • 201.

    Are metal rupture discs outside of the scope of NACE MR0175-ISO 15156?

    Are Metal Rupture Discs Excluded from NACE MR0175-ISO 15156? The question seeks clarification on whether metal rupture discs are excluded from the scope of NACE MR0175-ISO 15156 based on their plastic deformation during manufacturing and bursting. According to NACE Interpretation MP INQUIRY #2009-05 Part 1 and NACE MR0175-ISO 15156-1, Clause 5, Paragraph 9, ISO 15156-1 […]

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  • 202.

    NACE MR0175 and elastic or plastic design criteria

    Compatibility of Metal Rupture Discs with NACE MR0175-ISO 15156 Introduction The question concerns the compatibility of metal rupture discs with NACE MR0175-ISO 15156 based on their plastic deformation during manufacturing and bursting. This inquiry pertains to NACE MR0175-ISO 15156-1 Clause 5. Answer from NACE MR0175 Maintenance Panel The answer from NACE MR0175 Maintenance Panel clarifies […]

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  • 203.

    How can used and old equipment be certified to NACE MR0175?

    Existing Equipment and NACE Compliance The question relates to the compliance of a 1953 swab tank made of rolled 1/2-inch plate A283C with NACE MR0175. Section A2.1.6 requires stress relief and a maximum hardness of 22 HRC for rolled or deformed material. The tank is 84 in. in diameter and rated for 100-psi service, but […]

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  • 204.

    What are the NACE MR0175 requirements for C95800, C95400, C95500 and C63200?

    NACE Bronze Compliance Inquiry The inquiry relates to the compliance of valve components made of ASTM B148 UNS C95800, C95400, C95500 (body), ASTM B150 UNS C63200 (stem), and ASTM B148 UNS C95800 (ball) with NACE MR0175 for use in SOUR service. The user asks about the chemical, physical, hardness properties, and heat treatment requirements for […]

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  • 205.

    Successful field service? No documentation? What does NACE MR0175 require?

    Criteria for Replacing Materials in Existing Fields Introduction The question of when to replace materials in an existing field is a critical one. While ISO 15156-1 Paragraph 8.2 provides some qualification criteria, it can be unclear how to proceed when materials have been in use without documented problems. Documentation Requirements According to the ISO 15156 […]

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  • 206.

    Does NACE MR0175/ISO 15156 require production casing to be sour service compliant?

    Can NACE MR0175/ISO 15156 Require Sour Service Compliant Production Casing? OGC Energy offers material selection services for tubing, casing, and downhole components, with expertise in oilfield metallurgy and its role in well integrity. The question at hand is whether NACE MR0175/ISO 15156 requires production casing to be sour service compliant if the tubing’s containment string […]

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  • 207.

    Why does NACE MR0175 list S31600 and S31603 separately in part 3 Table A.2?

    Why Are Uns S31600 and S31603 Listed Separately in NACE MR0175/ISO 15156-3 Table A.2? In clause A.2 of NACE MR0175/ISO 15156-3, materials that comply with certain requirements are listed. However, UNS S31600 and S31603 are listed separately from other austenitic stainless steels, even though they meet the same requirements. This raises the question of why […]

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  • 208.

    NACE MR0175 Requirements for Austenitic Stainless Steel Expansion Joints and Flexible Hoses

    Flexible Hoses NACE: Compliance with MR0175 for Austenitic Stainless Steel Bellows The Inquiry The inquiry pertains to NACE MR0175/ISO 15156-3 Table A.2 and concerns the manufacture of expansion joints and flexible hoses. Specifically, the question is whether post-cold-forming heat treatment and a maximum hardness of 22 HRC are necessary to comply with the requirements of […]

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  • 209.

    What are the NACE MR0175 limits for Nitronic 50 (UNS S20910)?

    Nitronic 50 NACE Inquiry regarding the Use of Nitronic 50 with Table A.3 NACE MR0175 recently received an inquiry regarding the use of Nitronic 50 (UNS S20910) with Table A.3. If you require technical support on Nitronic 50, please contact OGC Energy. Can Nitronic 50 Be Used “”hot Worked”” and “”cold Worked””? The inquiry asks […]

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  • 210.

    What is the difference between NACE MR0175 and NACE MR0103? Get an answer from our expert team!

    Difference Between NACE MR0175 and NACE MR0103 Standards NACE MR0175 is an international standard that sets requirements and recommendations for the selection and qualification of metallic materials used in equipment for oil and gas production and in natural gas sweetening plants that have H₂S-containing environments. On the other hand, NACE MR0103 establishes material requirements for […]

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