Comparison of Diaphragm and Bourdon Tube Mechanisms in Pressure Gauges and Switches
November 4, 2018Temperature Sensor
November 18, 2018
Familiarity with NACE MR0175 Standard
The term NACE is derived from the acronym for the National Association of Corrosion Engineers, and MR is the abbreviation for Material Requisition.
The NACE MR0175 standard examines the properties and specifications of metals used in piping and instrumentation that come into contact with H₂S-containing fluids (sour service) in the oil, gas, and petrochemical industries.
The presence of H₂S (hydrogen sulfide) in sour service causes cracking on the surfaces of metals in contact with the fluid.
Tests conducted to evaluate this type of corrosion include:
Sulfide Stress Corrosion Cracking (SSCC)
HIC (Hydrogen Induced Cracking test)
These are respectively called Sulfide Stress Corrosion Cracking (SSCC) test and Hydrogen-Induced Cracking (HIC) test.
Among the requirements set by the NACE MR0175 standard are the minimum hardness (HBW) and the weight percentage of the metals forming the alloy (carbon, nickel, copper, manganese, etc.).
In sour service, the likelihood and rate of corrosion on metals also depend on the inherent process conditions and characteristics, such as pH, H₂S concentration, and Cl⁻ ions. This standard specifies different requirements depending on the service specifications.
The company NUOVAFIMA (Italy) can supply its equipment meeting the NACE MR0175 standard.
استاندارد nace نوافیما ،استاندارد nace ، گیج نوافیما ،nuovafima، گیج فشار با استاندارد nace ، تجهیزات nace
