NACE MR0103 and NACE MR0175
NACE MR0103 and NACE MR0175
(OP)
Recently I came across a requirement where the customer wanted complaince to NACE MR0103.What is the main difference between NCE MR 0175 and MR 0103.
Is the key difference there in the environmental conditions under which sulphide stress cracking occurs?
Is the key difference there in the environmental conditions under which sulphide stress cracking occurs?





RE: NACE MR0103 and NACE MR0175
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cheers,
gr2vessels
RE: NACE MR0103 and NACE MR0175
Bye, 'NGL
RE: NACE MR0103 and NACE MR0175
NACE Mission – To Protect People, Assets & Environment from the effects of Corrosion & Sulfide Stress Cracking:
Ø Combined action of Tensile stress and H2S (Corrosive medium)
Ø Hydrogen formed in Corrosion process embrittle the matl.
Ø H2S promotes the entry of hydrogen atoms in base metal
NACE MR0175
– This standard defines Sulfide Stress Corrosion Cracking Resistant materials for Oil & Gas Field Equipments
– First Standard published by NACE in the Year 1975
– Applies only to Oil Field Equipment, Pipelines and Oil Field Processing facilities, where H2S is present.
– This Standard Specifies Proper Materials, Heat Treatment Conditions & Strength Level.
– The Standard released in 2002 is called MR0175-2002 defines materials used for Sulfide Stress Cracking for Oil & Gas/Refinery equipments, although NACE MR0175 intend to be used in Oil & Gas Field Equipments only.
– In the Year 2003, 2 more standards released. ie MR0175-2003 & ISO 15156
– MR0175/ISO15156 – Applicable to both Sulfide Stress Cracking & Chloride Stress Cracking in Oil & Gas Production facilities.
– Now a Separate standard called NACE MR0103 made available for Refinery Services.
Note that NACE MR0175 means 2002 Standard and NACE MR0175/ISO 15156 means 2003 standard.
NACE MR0175/ISO 15156 DEFINITION
“Petroleum and natural gas industries— Materials for use in H2S-containing Environments in Oil and Gas production”
Some Comparison between NACE MR017-2002 & NACE MR0175-2003/ISO 15156
1. 2003 Standard addresses both Sulfide Stress Cracking & Chloride SC whereas 2002 standard address only SSC.
2. New Welding Procedure Qualification Records (PQR) to include Hardness survey along the Weld and HAZ to ensure proper hardness
3. Envt. restrictions on all Corr. Resistant Alloys (CRAs) except Carbon Steels and Low Alloy Steels in terms of
1. H2S partial pressure
2. Max. temp
3. ppm Chlorides
4. Presence of free sulphur
whereas prior standards list matls. as ‘acceptable’ or ‘not acceptable’
Hope this is in line with your question
RE: NACE MR0103 and NACE MR0175
HDS/MHC (Hydrodesulphurisation/midllehydrocracking) is downstream or upstream enviroment???
I think that in this case we have both combination (upstream and downstream)???
RE: NACE MR0103 and NACE MR0175
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdoweb/
RE: NACE MR0103 and NACE MR0175
I need to buy MR 0103 soon !
Thanks for your input.
Anirudha Mahajan.
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