API TR 1189:2025 pdf download – Internal Corrosion in Pipeline Facilities.Due to the increased prevalence ofinternal corrosion within facilities (relative to internal corrosion in transmission pipelines) and the challengesin performing facility piping inspections because the majority of the piping is unpiggable, this technical reportprovides an overview of internal corrosion threats within facilities and guidance on threat management andmitigation. A few case studies are provided to showcase where internal corrosion failures within facilities haveoccurred; lessons learned from those incidents; and how operators are evaluating and addressing the threat.