NACE MR0175 SSC Resistant Steels above 0.3 kPa (0.05 psi) and the acceptable pH and Cl- limits
Question about NACE MR0175 Clause 7.1.2 and SSC Resistant Steels
This webpage includes a question related to sub-clause 7.1.2 of NACE MR0175, which states that SSC Resistant Steels can be selected using A.2. for partial pressures equal to or above 0.3 kPa (0.05 psi). The question includes several sub-parts regarding the use of the suggested SSC-resistant materials, acceptable pH and Cl- limits, whether L80 type 1 is covered under A.2.2.3.3, and when corrosion inhibitors must be used.
Response to the Question
The response to the question clarifies that the suggested SSC-resistant materials can be used for all partial pressures above 0.05 psi, there are no established limits for pH and Cl- for carbon and low-alloy steels, L80 type 1 is not covered under A.2.2.3.3, and NACE MR0175/ISO 15156 does not cover the use of corrosion inhibitors.
Related NACE MR0175/ISO 15156-2 Clauses and Tables
The question pertains to NACE MR0175/ISO 15156-2 Clause 7.1.2, A.2.2.3.3, Table A.2, and Table A.3. The page also offers support for understanding and implementing NACE MR0175.