The 56” line had suffered from external corrosion.
56 Inch Coke Oven Gas Line

The 56” line had suffered from external corrosion.
The 20” and 28” lines had suffered from joint gasket failure on a total of 4 flanges
The 12” line had suffered from external corrosion.
The 8” H2S line had suffered from internal erosion.
The Close Drain and HP flare had suffered from external corrosion so severe that it had to be replaced.
A flange joint on 1 1/2” on a HP steam line had failed due to possible gasket or flange face issues
The tank had suffered from corrosion under insulation (CUI) to the vertical tank shell.
An LP steam line had a leaking gland.
The 2 x 10” lines had suffered from external corrosion
The 2 inch valve had failing machine hex nuts