Display problem ? Click HERE
Recommended :
Subscribe FREE - Processing Magazine
H2S dissolved in water to form weak acid promote corrosion and form free hydrogen. Free Hydrogen will penetrate the metal, reduce ductility of metal and potentially lead to stress failure below it yield stress, results Sulphide Stress Corrosion Cracking (SSCC).
Subscribe FREE - Processing Magazine
H2S dissolved in water to form weak acid promote corrosion and form free hydrogen. Free Hydrogen will penetrate the metal, reduce ductility of metal and potentially lead to stress failure below it yield stress, results Sulphide Stress Corrosion Cracking (SSCC).Sulfide stress corrosion cracking (SSCC) is cracking of metal involving corrosion and tensile stress (residual and/or applied) in the presence of water and H2S. SSC is a form of hydrogen stress cracking (HSC) and involves embrittlement of the metal by atomic hydrogen that is produced by acid corrosion on the metal surface. Hydrogen uptake is promoted in the presence of sulfides. The atomic hydrogen can diffuse into the metal, reduce ductility and increase susceptibility to cracking. High strength metallic materials and hard weld zones are prone to SSC.
NACE Standard MR0175 / ISO 15156 - Petroleum and Natural Gas Industries – Materials for use in H2S-containing Environments in Oil and Gas Production was established to provides limits of H2S partial pressure for precautions against sulfide stress cracking (SSC) and guidance for the selection and specification of SSC-resistant materials.
Since the released of this NACE MR0175 / ISO 15156, it has introduced a few more elements into the "sour" service criteria i.e. pH, Chloride contents, etc. This may have created some level of difficulties in understanding and usage of this standard.
Canadian Association of Petroleum Producers (CAPP) has released a document entitle "GUIDE in Use of International Standard NACE MR0175/ISO15156" to provides a supporting document, which may be used as a reference tool to :
NACE Standard MR0175 / ISO 15156 - Petroleum and Natural Gas Industries – Materials for use in H2S-containing Environments in Oil and Gas Production was established to provides limits of H2S partial pressure for precautions against sulfide stress cracking (SSC) and guidance for the selection and specification of SSC-resistant materials.
Since the released of this NACE MR0175 / ISO 15156, it has introduced a few more elements into the "sour" service criteria i.e. pH, Chloride contents, etc. This may have created some level of difficulties in understanding and usage of this standard.
Canadian Association of Petroleum Producers (CAPP) has released a document entitle "GUIDE in Use of International Standard NACE MR0175/ISO15156" to provides a supporting document, which may be used as a reference tool to :
- provide a brief overview of the NACE / ISO publication, outlining the most significant changes and their implication to the industry,
- provide guidance and assistance on how to apply the new publication using simple to follow flowcharts, and clarification examples,
- provide sample forms which could be used to meet the intent of the publication.
For those engineer involved in Oil & Gas (upstream) exploration and production, this document is pretty good for understanding and reference.
Download.
Related Post
- What are the concerns related to H2S ?
- Safety Moment with H2S
- Pyrophoric Fire
- Correct model and thermo package in Amine system simulation using HYSYS
- Pitting Corrosion - Mechanism & Prevention
- Hydrogen present and it's impact to metallurgy
- Different Equation for Pitting Resistance Equivalent Number (PREN)
- Chlorride stress corrosion cracking and use of correct MOC for seawater
- How a Chloride Stress Corrosion Cracking Lookslike ?
No comments:
Post a Comment