CSB Investigating Causes of Fatal Rupture of Heat ...
https://www.csb.gov/csb-investigating-causes-of-fatal-rupture-of-heat-exchanger-at-goodyear-synthetic-rubber-facility-in-houston/
During the shutdown, an isolation valve was closed between the heat exchanger and a pressure-relief device designed to protect the heat exchanger from possible over-pressure. On the morning of the accident, an operator used steam to clean out process piping; the steam also flowed through the heat exchanger tubes.
DA: 58 PA: 19 MOZ Rank: 24