1. SOUR SERVICE – THEN & NOW
Jerry Bauman, P. Eng.
NACE Corrosion Specialist
Canadian Natural Resources Ltd.

2. SOUR SERVICE – THEN & NOW
AGENDA
GENERAL COMMENTS
CARBON/LOW ALLOY STEELS
AUSTENITIC STAINLESS STEELS

3. NACE MR0175 VARIOUS DOCUMENTS EXISTED FIRST ISSUED IN 1975
GENERAL
NACE MR0175
VARIOUS DOCUMENTS EXISTED
FIRST ISSUED IN 1975
LAST ISSUED IN 2003
MERGED WITH ISO END OF 2003
NOT A CORROSION DOCUMENT

4. GENERAL
MR0103 DIRECTLY CONTRADICTS ISO DOCUMENT – STAINLESS STEEL LIMITATIONS, USE OF EXPERIENCE, REGIONS FOR CARBON STEEL, ETC.
HOW DOES A METAL KNOW?

5. NACE MR0175-2002 (NACE) VS ANSI/NACEMR0175/ISO15156 (ISO)
GENERAL
NACE MR (NACE) VS ANSI/NACEMR0175/ISO15156 (ISO)
NACE < 40 PAGES, ISO 135 PAGES
NACE – OBTAIN HARDNESSES, WHEREAS ISO – WHERE TO OBTAIN HARDNESSES

6. GENERAL
NACE – SSCC ONLY
ISO – ALL MECHANISMS THAT CAN BE CAUSED BY H2S
ISO – “LISTED” NOT “RESISTANT”
NACE FIGURES OF APPLICABILITY, ISO NO

7. GENERAL
END USER HAS ALWAYS BEEN RESPONSIBLE, NOT DESIGNERS, SUPPLIERS, CONSULTANTS, ETC.
IF CANNOT MEET NORMAL CRITERIA CAN DO LABORATORY TESTS
TWO YEARS EXPERIENCE TO QUALIFY EXISTING OR SIMILAR MATERIALS – CAREFUL OF MOP

8. ISO - CARBON/LOW ALLOY STEEL
HRC 22/HV250 REMAIN THE SAME
ISO - WELD HARDNESS QUALIFICATIONS ON TUBULAR PRODUCTS NOT REQUIRED IF SMYS ≤ 360 MPA
CANNOT “EXCEED” CONDITIONS FROM A SINGLE TEST UNLESS MEETS TM0177

9. CARBON/LOW ALLOY STEEL
ISO PROVIDES REGIONS
SPECIFIC TESTING TO QUALIFY TO REGIONS 1 AND 2
IGNORE REGION 3

11. CORROSION RESISTANT ALLOYS
42 TABLES FOR ENVIRONMENTAL AND MATERIALS LIMITS
NOT JUST H2S – TEMPERATURE, pH, SULFUR AND CHLORIDES.

12. STAINLESS STEELS
MAJOR CHANGES TO AUSTENITIC SS
NACE – HARDNESS, ISO – OPERATING CONDITIONS LIMITATIONS
VALVES ORDERED TO “NACE” NO LONGER APPLICABLE UNLESS – CRA COMPONENTS HAVE NO LIMITATIONS

13. NICKEL-BASED ALLOYS
Different classes based on composition
Classes have different restrictions based on H2S levels and Temperature
Ultra – conservative
Can use alloy manufacturer’s data – be careful of source

15. SUMMARY
Carbon/Low Alloy steels have fewer restrictions in ISO
ISO more helpful in how to perform testing
Austenitic alloys have severe restrictions in ISO
Refineries – still old school