Skip to Main Content

An independent federal agency investigating chemical accidents to protect workers, the public, and the environment.

Text Size AA

Follow Us

YouTube Facebook Twitter

Email Sign-up


Total # of Recommendations
Total # of Open Recommendations
Total # of Closed Recommendations
Total % of Open 22 vs. Closed 78


Apr 20, 2017 PDF Document Airgas Final Investigation Report - Final Report
Feb 27, 2017 PDF Document Response to Public Comments - CSB Responses to Public Comments
Jan 25, 2017 PDF Document API 653 Inspection Report - Tank 395 - Contractor Reports
Jan 25, 2017 PDF Document API 653 Inspection Report - Tank 397 - Contractor Reports
Jan 25, 2017 PDF Document API 653 Inspection Report - Tank 396 - Contractor Reports
Jan 25, 2017 PDF Document Metallurgical Evaluation of Tank Coupon - Contractor Reports
Oct 19, 2016 PDF Document Williams Olefins Case Study - Case Study
Sep 28, 2016 PDF Document Freedom Industries Investigation Report - Final Report
Aug 11, 2016 PDF Document CSB Safety Alert: Preventing High Temperature Hydrogen Attack (HTHA) - Related Safety Bulletin
The CSB’s investigation into the catastrophic failure of a forty-year-old heat exchanger at the Tesoro Refinery determined that the fatal explosion and fire was caused by a damage mechanism known as high temperature hydrogen attack, or HTHA, which severely cracked and weakened the carbon steel heat exchanger over time, leading to a rupture. The CSB’s report released in May 2014 concluded that the standard industry uses for determining vulnerability of equipment to HTHA is inadequate. To address its findings, the CSB made recommendations intended to prevent HTHA to the industry group that issues guidance on HTHA, the American Petroleum Institute (API). Because of these noted deficiencies, the Board voted on July 13, 2016, to designate the Recommendation 2010-08-I-WA-R10 with the status of Closed – Unacceptable Action. In the absence of industry guidance that incorporates findings from the Tesoro Anacortes failure, the CSB is issuing a safety alert to provide additional direction for industry.
Aug 02, 2016 PDF Document Case Study - Case Study
May 31, 2016 PDF Document Macondo Investigation Report Volume 4 - Final Report
Results: 395 Records found.
© All rights reserved