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

Kleen Energy Natural Gas Explosion (18 Recommendations)
American Society of Mechanical Engineers (ASME) (1 Recommendations)
Open: 100% | Closed: 0%

Final Report Released On: June 28, 2010

2010-07-I-CT-3 URGENT!

Make appropriate changes to the 2012 version of Power Piping, ASME B31.1, to require the use of inherently safer fuel gas piping cleaning methodologies rather than natural gas blows. At a minimum, for the cleaning or flushing methods discussed in B31.1 paragraph 122.10, require the use of inherently safer alternatives such as air blows and pigging with air as the motive force in lieu of flammable gas.


Status: Open - Acceptable Response or Alternate Response
Open - Acceptable Response or Alternate Response (O - ARAR) - Response from recipient indicates a planned action that would satisfy the objective of the recommendation when implemented.
 

PDF Document Recommendation Status Change Summary

Electric Power Research Institute (EPRI) (1 Recommendations)
Open: 0% | Closed: 100%

Final Report Released On: June 28, 2010

2010-07-I-CT-18 URGENT!

Work with the six turbine manufacturers identified in this document – General Electric, Siemens, Solar, Mitsubishi Power Systems, Pratt & Whitney, and Rolls-Royce – to publish technical guidance addressing the safe cleaning of fuel gas piping supplying gas turbines. At minimum:

a. For cleaning methodology, require the use of inherently safer alternatives such as air blows and pigging with air in lieu of flammable gas.

b. Provide comprehensive technical guidance on inherently safer methods for cleaning fuel gas piping, such as the use of air or pigging with air.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

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General Electric (GE) (2 Recommendations)
Open: 0% | Closed: 100%

Final Report Released On: June 28, 2010

2010-07-I-CT-4 URGENT!

Provide to your customers:

a. Comprehensive technical guidance on inherently safer methods for cleaning fuel gas piping, such as the use of air or pigging with air.

b. Comprehensive Cleaning Force Ratio (CFR) guidelines, specifying both the upper and lower limits required to obtain satisfactory cleaning for the fuel gas piping for purposes of the warranties of the turbines.

c. Warnings against the use of fuel gas to clean pipes.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

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2010-07-I-CT-10 URGENT!

Work with the Electric Power Research Institute to publish technical guidance addressing the safe cleaning of fuel gas piping supplying gas turbines. At minimum:

a. For cleaning methodology, require the use of inherently safer alternatives such as air blows and pigging with air in lieu of flammable gas.

b. Provide technical guidance for the safe and effective use of alternative methods for cleaning such as air and pigging with air.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

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Governor and Legislature of the State of Connecticut (2 Recommendations)
Open: 0% | Closed: 100%

Final Report Released On: June 28, 2010

2010-07-I-CT-16 URGENT!

Enact legislation applicable to power plants in the state that prohibits the use of flammable gas that is released to the atmosphere to clean fuel gas piping.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

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2010-07-I-CT-17 URGENT!

Adopt the current version of NFPA 54 as amended pursuant to 2010-01-I-CT-R2.


Status: Closed - No Longer Applicable
Closed - No Longer Applicable (C - NLA) - Due to subsequent events, the recommendation action no longer applies (e.g., the facility was destroyed or the company went out of business).
 

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Mitsubishi Power Systems (2 Recommendations)
Open: 0% | Closed: 100%

Final Report Released On: June 28, 2010

2010-07-I-CT-7 URGENT!

Provide to your customers:

a. Comprehensive technical guidance on inherently safer methods for cleaning fuel gas piping, such as the use of air or pigging with air.

b. Comprehensive Cleaning Force Ratio (CFR) guidelines, specifying both the upper and lower limits required to obtain satisfactory cleaning for the fuel gas piping for purposes of the warranties of the turbines.

c. Warnings against the use of fuel gas to clean pipes.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

PDF Document Download

2010-07-I-CT-13 URGENT!

Work with the Electric Power Research Institute to publish technical guidance addressing the safe cleaning of fuel gas piping supplying gas turbines. At minimum:

a. For cleaning methodology, require the use of inherently safer alternatives such as air blows and pigging with air in lieu of flammable gas.

b. Provide technical guidance for the safe and effective use of alternative methods for cleaning such as air and pigging with air.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

PDF Document Download

National Fire Protection Association (NFPA) (1 Recommendations)
Open: 0% | Closed: 100%

Final Report Released On: June 28, 2010

2010-07-I-CT-2 URGENT!

Enact a Tentative Interim Amendment and permanent changes to the National Fuel Gas Code (NFPA 54/ANSI Z223.1) that address the safe conduct of fuel gas piping cleaning operations. At a minimum:

a. Remove the existing NFPA 54 fuel gas piping exemptions for power plants and systems with an operating pressure of 125 pounds per square inch gauge (psig) or more.

b. For cleaning methodology, require the use of inherently safer alternatives such as air blows or pigging with air in lieu of flammable gas.


Status: Closed - Exceeds Recommended Action
Closed - Exceeds Recommended Action (C - ERA) - Action on the recommendation meets and surpasses the objectives envisioned by the Board.
 

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Occupational Safety and Health Administration (OSHA) (1 Recommendations)
Open: 100% | Closed: 0%

Final Report Released On: June 28, 2010

2010-07-I-CT-1 URGENT!

Promulgate regulations that address fuel gas safety for both construction and general industry. At a minimum:

a. Prohibit the release of flammable gas to the atmosphere for the purpose of cleaning fuel gas piping.

b. Prohibit flammable gas venting or purging indoors. Prohibit venting or purging outdoors where fuel gas may form a flammable atmosphere in the vicinity of workers and/or ignition sources.

c. Prohibit any work activity in areas where the concentration of flammable gas exceeds a fixed low percentage of the lower explosive limit (LEL) determined by appropriate combustible gas monitoring.

d. Require that companies develop flammable gas safety procedures and training that involves contractors, workers, and their representatives in decision-making.


Status: Open - Unacceptable Response/No Response Received
Open - Unacceptable Response/No Response Received (O - UR) - Recipient responds by expressing disagreement with the need outlined in the recommendation. The Board believes, however, that there is enough supporting evidence to ask the recipient to reconsider.
 

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Pratt & Whitney (2 Recommendations)
Open: 0% | Closed: 100%

Final Report Released On: June 28, 2010

2010-07-I-CT-8 URGENT!

Provide to your customers:

a. Comprehensive technical guidance on inherently safer methods for cleaning fuel gas piping, such as the use of air or pigging with air.

b. Comprehensive Cleaning Force Ratio (CFR) guidelines, specifying both the upper and lower limits required to obtain satisfactory cleaning for the fuel gas piping for purposes of the warranties of the turbines.

c. Warnings against the use of fuel gas to clean pipes.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

PDF Document Download

2010-07-I-CT-14 URGENT!

Work with the Electric Power Research Institute to publish technical guidance addressing the safe cleaning of fuel gas piping supplying gas turbines. At minimum:

a. For cleaning methodology, require the use of inherently safer alternatives such as air blows and pigging with air in lieu of flammable gas.

b. Provide technical guidance for the safe and effective use of alternative methods for cleaning such as air and pigging with air.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

PDF Document Download

Rolls-Royce (2 Recommendations)
Open: 0% | Closed: 100%

Final Report Released On: June 28, 2010

2010-07-I-CT-9 URGENT!

Provide to your customers:

a. Comprehensive technical guidance on inherently safer methods for cleaning fuel gas piping, such as the use of air or pigging with air.

b. Comprehensive Cleaning Force Ratio (CFR) guidelines, specifying both the upper and lower limits required to obtain satisfactory cleaning for the fuel gas piping for purposes of the warranties of the turbines.

c. Warnings against the use of fuel gas to clean pipes.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

PDF Document Recommendation Status Change Summary

2010-07-I-CT-15 URGENT!

Work with the Electric Power Research Institute to publish technical guidance addressing the safe cleaning of fuel gas piping supplying gas turbines. At minimum:

a. For cleaning methodology, require the use of inherently safer alternatives such as air blows and pigging with air in lieu of flammable gas.

b. Provide technical guidance for the safe and effective use of alternative methods for cleaning such as air and pigging with air.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

PDF Document Download

Siemens (2 Recommendations)
Open: 0% | Closed: 100%

Final Report Released On: June 28, 2010

2010-07-I-CT-5 URGENT!

Provide to your customers:

a. Comprehensive technical guidance on inherently safer methods for cleaning fuel gas piping, such as the use of air or pigging with air.

b. Comprehensive Cleaning Force Ratio (CFR) guidelines, specifying both the upper and lower limits required to obtain satisfactory cleaning for the fuel gas piping for purposes of the warranties of the turbines.

c. Warnings against the use of fuel gas to clean pipes.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

PDF Document Download

2010-07-I-CT-12 URGENT!

Work with the Electric Power Research Institute to publish technical guidance addressing the safe cleaning of fuel gas piping supplying gas turbines. At minimum:

a. For cleaning methodology, require the use of inherently safer alternatives such as air blows and pigging with air in lieu of flammable gas.

b. Provide technical guidance for the safe and effective use of alternative methods for cleaning such as air and pigging with air.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

PDF Document Download

Solar Turbines (2 Recommendations)
Open: 0% | Closed: 100%

Final Report Released On: June 28, 2010

2010-07-I-CT-6 URGENT!

Provide to your customers:

a. Comprehensive technical guidance on inherently safer methods for cleaning fuel gas piping, such as the use of air or pigging with air.

b. Comprehensive Cleaning Force Ratio (CFR) guidelines, specifying both the upper and lower limits required to obtain satisfactory cleaning for the fuel gas piping for purposes of the warranties of the turbines.

c. Warnings against the use of fuel gas to clean pipes.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

PDF Document Recommendation Status Change Summary

2010-07-I-CT-11 URGENT!

Work with the Electric Power Research Institute to publish technical guidance addressing the safe cleaning of fuel gas piping supplying gas turbines. At minimum:

a. For cleaning methodology, require the use of inherently safer alternatives such as air blows and pigging with air in lieu of flammable gas.

b. Provide technical guidance for the safe and effective use of alternative methods for cleaning such as air and pigging with air.


Status: Closed - Acceptable Action
Closed - Acceptable Action (C - AA) - The recipient has completed action on the recommendation. The action taken meets the objectives envisioned by the Board.
 

PDF Document Download