What is ISO 15156:3-2016?

ISO 15156:3-2016, also known as NACE MR0175, is an international standard developed by the International Organization for Standardization (ISO) and the National Association of Corrosion Engineers (NACE). This standard provides guidelines for the selection and qualification of materials for use in environments containing S (hydrogen sulfide) in oil and gas production, petroleum refining, and other related industries.

Scope of ISO 15156:3-2016

The main purpose of ISO 15156:3-2016 is to prevent sulfide stress cracking (SSC) and stress-oriented hydrogen-induced cracking (SOHIC) in sour service. It addresses the effects of S, elemental sulfur, and other sulfide species on the properties and behavior of various materials used in the oil and gas industry. The standard covers carbon and low-alloy steels, stainless steels, nickel alloys, and other corrosion-resistant alloys.

Key Requirements of ISO 15156:3-2016

ISO 15156:3-2016 outlines several key requirements for qualifying materials in sour service conditions. These include:

Evaluating the resistance of materials to sulfide stress cracking and stress corrosion cracking

Assessing the susceptibility of materials to hydrogen embrittlement

Performing laboratory tests, such as hardness measurements and tensile testing, to determine the mechanical properties of the materials

Providing guidelines for the use of welding and heat treatment processes on materials intended for sour service

Benefits of ISO 15156:3-2016

ISO 15156:3-2016 helps ensure the integrity and safety of equipment and infrastructure in sour service environments. By following the standard's guidelines, companies can effectively select, qualify, and manage materials that resist corrosion and cracking caused by exposure to S. This reduces the risk of equipment failures, improves operational reliability, and enhances the overall environmental performance of the oil and gas industry.

In conclusion, ISO 15156:3-2016 is an important international standard that sets forth guidelines for selecting and qualifying materials used in sour service. By adhering to this standard, companies can mitigate the risks associated with sulfide stress cracking and hydrogen-induced cracking, ensuring the safe and efficient operation of equipment in the oil and gas industry.