Nace MR0175 Line Pipe of Size

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What is NACE MR0175?

NACE MR0175, described as "Standard Material Requirements for Resistance to sulfide Stress Cracking in Corrosive Petroleum Refining Environments," addresses the problem of sulfide stress cracking in petroleum and petroleum refining environments. Sulfide stress cracking (SSC) is a type of hydrogen-induced cracking that occurs when steel and other alloys are exposed to hydrogen sulfide (H2S) and stress. This type of cracking can lead to catastrophic equipment failure and poses serious safety and environmental risks to petroleum refining operations. NACE MR0175 was developed to reduce SSC risk by providing requirements for the selection and identification of materials resistant to sulfide stress cracking.

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

One of the key aspects of NACE MR0175 is the identification of materials through testing and recording. The NACE MR0175 also provides guidelines for the design and manufacture of equipment and components to minimize the risk of sulfide stress cracking. It includes recommendations for welding procedures, surface treatment and other measures to prevent hydrogen-induced cracking in the field.

Chemical composition

Mechanical property requirements