The CSB issues safety recommendations to prevent the recurrence or reduce the likelihood or consequences of similar incidents or hazards in the future. Recommendations are issued to a variety of parties, including government entities, safety organizations, trade unions, trade associations, corporations, emergency response organizations, educational institutions, and public interest groups. Recommendations are published in CSB reports and are closed only by vote of the Board. The CSB tracks all recommendations and communicates regularly with recommendations recipients to ensure that the recommended corrective actions are implemented.

For more information, see Frequently Asked Questions about CSB recommendations.


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Recommendations

United States Steel Corporation Clairton Plant Coke Oven Explosion (7 Recommendations)
MPW Industrial Services, Inc. (1 Recommendations)
Open: 100% | Closed: 0%

Final Report Released On: August 10, 2026

2025-03-I-PA-7

Develop written policies and procedures in accordance with industry guidance such as NFPA 56 Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable Gas Piping Systems, governing cleaning piping systems containing flammable or toxic gas. Ensure that all workers who will or might participate in such operations are trained on the policies and procedures.


Status: Open - Awaiting Response or Evaluation/Approval of Response
Open - Awaiting Response or Evaluation/Approval of Response (O - ARE/AR) - The recipient has not submitted a substantive response, or the evaluation by CSB staff of a response is pending, or the Board has not yet acted on staff recommendation of status.
 

PDF Document Recommendation Status Change Summary

Nippon Steel North America, Inc. (1 Recommendations)
Open: 100% | Closed: 0%

Final Report Released On: August 10, 2026

2025-03-I-PA-6

Develop and implement a corporate process safety governance program to ensure the implementation of process safety management at applicable facilities. At a minimum, this program shall:

a. include regular audits of subordinate facilities throughout the organization;

b. require the documentation of process safety deficiencies, when identified, and prompt corrective action; and,

c. incorporate industry guidance, such as the Center for Chemical Process Safety’s (CCPS) Guidelines for Implementing Process Safety Management, the CCPS’s Process Safety – Leadership from the Boardroom to the Frontline, and other industry good practice guidance publications.


Status: Open - Awaiting Response or Evaluation/Approval of Response
Open - Awaiting Response or Evaluation/Approval of Response (O - ARE/AR) - The recipient has not submitted a substantive response, or the evaluation by CSB staff of a response is pending, or the Board has not yet acted on staff recommendation of status.
 

PDF Document Recommendation Status Change Summary

U.S. Steel Clairton Coke Works (5 Recommendations)
Open: 100% | Closed: 0%

Final Report Released On: August 10, 2026

2025-03-I-PA-1

Conduct a siting evaluation for all occupied and potentially occupied buildings at the Clairton Coke Works facility. Utilize the guidance contained in the Center for Chemical Process Safety’s Guidelines for Evaluating Process Plant Buildings for External Explosions, Fires, and Toxic Releases, the American Petroleum Institute’s Recommended Practices 752, 753, and 756, and other industry good practice guidance documents.


Status: Open - Awaiting Response or Evaluation/Approval of Response
Open - Awaiting Response or Evaluation/Approval of Response (O - ARE/AR) - The recipient has not submitted a substantive response, or the evaluation by CSB staff of a response is pending, or the Board has not yet acted on staff recommendation of status.
 

PDF Document Recommendation Status Change Summary

2025-03-I-PA-2

Using the results from the evaluation performed in 2025-03-I-PA-R1, ensure that all documented facility siting hazards are mitigated in accordance with the guiding principles contained in the American Petroleum Institute’s Recommended Practices 752, 753, and 756.


Status: Open - Awaiting Response or Evaluation/Approval of Response
Open - Awaiting Response or Evaluation/Approval of Response (O - ARE/AR) - The recipient has not submitted a substantive response, or the evaluation by CSB staff of a response is pending, or the Board has not yet acted on staff recommendation of status.
 

PDF Document Recommendation Status Change Summary

2025-03-I-PA-3

Develop a written procedure in accordance with industry guidance such as NFPA 56 Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable Gas Piping Systems, for washing valve seats with pressurized water. Ensure that the procedure includes steps and other controls, including overpressure protection, to minimize the hazards of the operation. Ensure that workers who will or might perform the operation are involved in the development of the procedure and are trained on the procedure.


Status: Open - Awaiting Response or Evaluation/Approval of Response
Open - Awaiting Response or Evaluation/Approval of Response (O - ARE/AR) - The recipient has not submitted a substantive response, or the evaluation by CSB staff of a response is pending, or the Board has not yet acted on staff recommendation of status.
 

PDF Document Recommendation Status Change Summary

2025-03-I-PA-4

Conduct a hazard analysis or safety validation of the written valve washing procedure in accordance with NFPA 56 Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable Gas Piping Systems. Ensure that workers who will or might perform the operation are involved in the analysis or validation.


Status: Open - Awaiting Response or Evaluation/Approval of Response
Open - Awaiting Response or Evaluation/Approval of Response (O - ARE/AR) - The recipient has not submitted a substantive response, or the evaluation by CSB staff of a response is pending, or the Board has not yet acted on staff recommendation of status.
 

PDF Document Recommendation Status Change Summary

2025-03-I-PA-5

Develop a comprehensive process safety management system, incorporating guidance from the Center for Chemical Process Safety’s Guidelines for Risk Based Process Safety and other industry good practice guidance publications, and apply it to all coke oven gas processes at the Clairton facility.


Status: Open - Awaiting Response or Evaluation/Approval of Response
Open - Awaiting Response or Evaluation/Approval of Response (O - ARE/AR) - The recipient has not submitted a substantive response, or the evaluation by CSB staff of a response is pending, or the Board has not yet acted on staff recommendation of status.
 

PDF Document Recommendation Status Change Summary