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NACE MR 0175

Date:2022-03-31View:307Tags:HFW steel pipe,Galvanized pipe,RHS section

NACE MR0175/ISO 15156 provides common rules, gives suggestions and requirements to select qualified steel materials, that served in equipment used in oil and gas production, and in natural gas sweentening plants in H2S-containing environments. Where if such equipment failed could make a risk to human health and safety, and damage to the environment.

It is also a federal standard in US as recognized as ISO 15156, for Petroleum and natural gas industries that materials applied in H2S-containing environments in oil and gas production.

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


Chemical Composition

Chemical composition

%

Maximum Carbon

0.21

Manganese

1.00

Silicon

0.40

Sulphur

0.003

Phosphorous

0.015

Copper

0.35

Oxygen

0.002

Nickel

0.30

Chromium

0.20

Molybdenum

0.20

Mechanical Strength

Mechanical properties of tensile strength, and yield strength is same with general pipes referred to corresponding standards.

Applications

The material shall be used in water-containing liquid and media which include all kinds of gas, or H2S containing crude oil, the H2S absolute partial pressure ≥0.0003 Mpa (0.05 psia).

On the other hand, under these conditions there is no need apply to MR0175. (It’s up to users.)

a. Low pressure gas: the total pressure is lower than 0.4 MPa (65 psia).
b. Low pressure gas and oil multi phases media: the total pressure is lower than 1.83 MPa.

MR0175 standards of general material requirements for selecting of cracking-resistant material, cracking-resistant carbon and low-alloys steels, cast irons, cracking-resistant alloys and other alloys. And details requirements for H2S containing equipment.

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