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What is NACE MR0175/ISO 15156 Pipe Fittings

Today we will introduce what is NACE MR0172 / ISO 15156 from different aspects. 1.What is NACE?
Established in 1943, NACE is the national association of corrosion engineers.The founders are 11 pipeline industry antiseptic engineers.
Up to now, NACE has become the largest broadcasting anti-corrosion knowledge and improving anti-corrosion skills of the organization.
In the NACE standard, MR0175 is the material requirement standard for petroleum and natural gas production and equipment containing hydrogen sulfide.
Therefore, Nace pipes and fittings are used for H 2 S transportation with gas and oil.
2.The scope of NACE MR0175/ISO 15156.
NACE MR0175 / ISO 15156 provides general rules, recommendations and requirements for the selection of qualified steel materials for equipment used in petroleum and natural gas production, as well as natural gas quenching equipment in hydrogen sulfide environments.If such equipment fails, it may pose a threat to human health and safety and damage the environment.
It is also the federal standard in the United States and is recognized as ISO 15156 for the petroleum and natural gas industries, and is used in petroleum and natural gas production environments where hydrogen sulfide is present.
What is NACE MR0175/ISO 15156 Pipe Fittings
3.How select NACE material?
Steel materials selected or certified using NACE MR0175 / ISO 15156 are resistant to cracking in certain hydrogen sulfide environments in petroleum and natural gas production, but are not immune to all conditions of use.
So, it is used as a specification to select qualified materials for carbon and low-alloy steel, corrosion resistant alloy steel and other alloy materials that are not affected in environments containing hydrogen sulfide. At the same time, this standard also applies to API, ASTM, ASME and ANSI, etc.
(in some cases, the NACE pipeline is also an acid service pipeline for H2S environments.)
4.NACE Carbon Steel Pipes.
In standard NACE MR0175, carbon steel pipes and fittings used in the petroleum industry usually contain less than 0.8% of carbon.
Carbon steel and low alloy steel include plates, pipes and pipe fittings in accordance with NACE MR0175, with the exception of the specified circumstances, no further SSC testing is required. However, any SSC tests that form part of the material manufacturing specification should be successfully performed and results reported.
Please note that the carbon steel and alloy steel pipes and fittings described/listed in the previous NACE MR0175 (all versions) are identified by archiving faults/success and wide association with laboratory data.The hardness limit of HRC 22 applied to most carbon steel and low alloy steel is based on the correlation of heat treatment, chemical composition, hardness and failure experience.Higher hardness limits for chromium-molybdenum steel are based on similar considerations.
5.NACE MR0175 pipe and fittings
Steel pipes and fittings made from NACE materials (in accordance with NACE MR 0175 or ISO 15156).We call it an NACE pipe or an NACE pipe fitting.
Therefore, these products are specially used in oil and gas environments containing corrosive chemicals such as H2S.

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