Introduction

NACE MR0175 is an international standard that outlines the requirements for metallic materials exposed to H₂S in oil and gas production environments. It is identical to ISO 15156, and ANSI/NACE MR0175/ISO 15156 lists the requirements for carbon steels, low alloys, and corrosion-resistant alloys exposed to H₂S in oil and gas exploration and production environments

Traceability and Marking Requirements

NACE MR0175 Part 2 Clause 9 requires compliant materials to be traceable, preferably through marking. It is important to use low-stress identification stamping (such as dot-vibratory or round-V) and avoid marking high-stress areas.

Designations for Carbon and Low-alloy Steel

For carbon and low-alloy steel, NACE MR0175 Part 2 Annex E provides designations that may be used to identify materials.

Marking Designations for CRAs

In NACE MR0175 Part 3 Annex C, there are examples of marking designations for CRAs.

How Our Team Can Help

Our team can assist you in defining appropriate marking and identification methods for raw materials and equipment to ensure compliance with NACE MR0175’s requirements. Contact us today to learn more about how we can help you meet these standards.