Requirement of NACE MR0175

How to select material

Steel materials that selected or qualified using NACE MR0175/ISO 15156 are resistant to cracking in defined H2S-Containing environments in oil and gas production, but are not nesessarily immune under all service conditions.

Consequently,it has been taken as the instructions for selecting the qualified material of carbon and low-alloy steels, corrosion resistant alloy steels and other alloy materials that against in the H2S contained environments. Meanwhile, the standard also suitable for API, ASTM, ASME and ANSI etc.,

(In some cases, NACE pipe is also equivalent to sour service pipe, that applied in H2S environments.)

NACE MR0175 180 Degree Elbows

Equipment that applied with NACE MR0175

We know that there are a lot of equipment applied with NACE MR0175/ISO 15156 standard, mostly in oil and gas drilling, construction, lifting activities.

For example drilling as drill bits; Subface equipment like sucker rods pumps and sucker rods, electric submersible pumps, and other artificial lift equipment;

Sour water handling equipment, natural gas treatment plants.

And most important, steel pipe and fittings that for transportation pipelines of oil and gas, liquids, and multiphase fluids.

NACE Carbon Steel Pipes Related

Carbon and alloy steel containing up to carbon and up to manganese and residual quantities of other elements, except those intentionally added in specific quantities for deoxidation (usually silicon and/or aluminum)

Please note:

In standard NACE MR0175 carbon steel pipes and fittings material used in petroleum industry usually contain carbon less than 0.8%.

Carbon and low alloy steels includes plate, pipe, pipe fitting that complied with NACE MR0175, with stated exceptions, further SSC testing is not required. Nevertheless, any SSC testing that forms part of a materials manufacturing specification shall be carried out successfully and the results reported.

Please note, the carbon and alloy steel pipes and fittings described/listed in previously NACE MR0175 (all versions) were identified by extensive correlations of filed failures/successes and laboratory data. The hardness limit of HRC 22 applied to most carbon and low alloy steels was based upon correlations of heat treatment, chemical composition, hardness and failure experience. The higher hardness limits for the chromium-molybdenum steels were based upon similar considerations.

Carbon Steel Pipe Standards Refer NACE

NACE MR0175 standard includes below standard steel pipes

API 5L Seamless Grade B to X42,to X65

ASTM A53 Pipe

ASTM A106 Grade B, A, and C

ATSM A333 Grade 1 and 6

ASTM A524 Grade 1 and 2

ASTM A 381 Class 1 Y35 and to Y65

ISO 3183-3 Grade L245 to L450

Casing and Tubing from API 5CT J55/K55 to T95

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