If you are currently using the 2015 or 2012 version, upgrading to the is not optional—it is a matter of safety. Here are the major revisions:
: Choosing corrosion-resistant materials or employing specific fabrication practices to reduce susceptibility to sensitization. Inspectioneering Evolution of the Standard
The 2021 revision provides sharper thresholds for defining sour environments. While ISO 15156 uses partial pressure of H₂S (>0.05 psi or 0.3 kPa), SP0170-2021 adds specific footnotes for low-temperature and high-pressure scenarios where traditional rules may fail.
: Applying alkaline solutions (such as soda ash) to neutralize any acids that may have formed on the equipment surfaces. Dry Air Purging
