What is NACE MR0175?

NACE MR0175, also known as the "Standard Material Requirements for Resistance to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments," is a standard developed by the National Association of Corrosion Engineers (NACE) to address the issue of sulfide stress cracking in the oil and gas industry. This standard provides guidelines for the selection and qualification of materials used in equipment and components that will be exposed to corrosive environments in petroleum refining operations.

Sulfide stress cracking (SSC) is a form of hydrogen-induced cracking that occurs in steel and other alloys when they are exposed to hydrogen sulfide (H2S) and stress. This type of cracking can lead to catastrophic failure of equipment and pose serious safety and environmental risks in petroleum refining operations. NACE MR0175 was developed to mitigate the risk of SSC by providing requirements for the selection and qualification of materials that are resistant to sulfide stress cracking.

The standard covers a wide range of materials, including carbon and low-alloy steels, stainless steels, nickel alloys, and other corrosion-resistant alloys. It provides guidelines for material selection, heat treatment, hardness limits, and testing requirements to ensure that the materials used in petroleum refining operations are resistant to sulfide stress cracking.

One of the key aspects of NACE MR0175 is the qualification of materials through testing and documentation. The standard outlines specific testing requirements, such as hardness testing, tensile testing, and sulfide stress cracking testing, to demonstrate the resistance of materials to sulfide stress cracking. In addition, the standard requires manufacturers to provide documentation, such as material test reports and compliance certificates, to verify that the materials meet the requirements of NACE MR0175.

NACE MR0175 also provides guidelines for the design and fabrication of equipment and components to minimize the risk of sulfide stress cracking. This includes recommendations for welding procedures, surface treatments, and other measures to prevent hydrogen-induced cracking in the field.

Compliance with NACE MR0175 is essential for ensuring the integrity and reliability of equipment and components in petroleum refining operations. By selecting and qualifying materials in accordance with the standard, operators can minimize the risk of sulfide stress cracking and ensure the safety and efficiency of their facilities.

In conclusion, NACE MR0175 is a critical standard for the oil and gas industry, providing guidelines for the selection and qualification of materials that are resistant to sulfide stress cracking in corrosive petroleum refining environments. By following the requirements of this standard, operators can mitigate the risk of sulfide stress cracking and ensure the integrity and reliability of their equipment and components. Compliance with NACE MR0175 is essential for maintaining the safety and efficiency of petroleum refining operations.

Hikelok can provide various of products that comply with NACE MR0175 standard, such as Tube Fittings, Pipe Fittings, Ball Valves, Needle Valves, Check Valves, Relief Valves, Sample Cylinders.