Hazardous energy sources

SAFETY OF PLANT AND ENVIRONMENT 7 TABLE 1.4. Some Potential Hazards Energy Source... 

No employee shall be permitted to perform maintenance or repair activity on equipment (such as compressors mixers, screens or pumps used for concrete and masonry construction activities) where the inadvertent operation of the equipment could occur and cause injury, unless all potential hazardous energy sources have been locked out and tagged. 

Hazard Energy Source or Material Group Potential Events by Category... 

This safety compliance checklist assists employers and supervisors in determining that procedures and equipment are available and personnel are trained in the control of hazardous energy sources. This checklist only addresses the minimum required standards. Where appropriate, it may be supplemented with local site- or shop-unique requirements. Relevant references are noted after each question. 

Is an approved lock or tag used to isolate each hazardous energy source ... 

CONTROL OF HAZARDOUS ENERGY SOURCES [LOCKOUT/TACOUT] (29 CFR 1910.147)... 

All authorized employees be trained in the recognition of applicable hazardous energy sources, the type and magnitude of hazardous energy sources in use at the facility, and how to perform the lockout/tagout procedures. 

Reply Yes, but only If all of the provisions of the Lockout/Tagout standard, 1910.147 are met and all hazardous energy sources are effectively controlled. Whether a hydraulic pump and motor is effectively locked or tagged out will have to be determined on a case-by-case basis by the employer, who is ultimately responsible for the safety of employees. ... 

U.S. Department of Labor, Occupational Safely and Health Administration 29 CFR Part 1910, Occupational Safety and Health Standards for General Industry, Subpart S, Electrical, 1910.301 to 1910.399 including 1910.331 through 1910.335 Electrical Safely Related Woik Practices Subpart J, General Environmental Controls, 1910.147, The Control of Hazardous Energy Sources (Lockout/Tagout) 29 CFR Part 1926, Occupational Safety and Health Standards for the Construction Industry, Subpart K, Electrical, 1926.400 to 1926.449... 

Some of the most important errors identified in the PHEA worksheets were inadequate isolation of process equipments, inadequate labelling of equipment, delay in starting the work after issue the work permit, improper gas testing, inadequate site preparation measures etc. 32% of predicted errors, were related to inadequate isolation of process equipments and hazardous energy source which are one of the main causes of accidents in process industries. 

Lockout/tagout of hazardous energy sources standard issued to protect 39 million workers from unexpected energization or start-up of machines or equipment and prevent 120 deaths and... 

Many workplaces have high accident incidence and severity rates because they are hazardous. Hazards are dangerous situations or conditions that can lead to accidents. The more the hazards present, the greater the chance that there will be accidents. Most hazards are from the direct release of some form of energy (i.e., mechanical, electrical, thermal, etc.). The control of hazardous energy sources is the main avenue for prevention of incidents that could result in injury, illnesses, or death. Unless safety procedures are followed, a direct relationship will exist between the number of hazards in the workplace and the number of accidents that will occur there. 

Figure 8.1 Hazard energy sources. (Courtesy of Lawrence Livermore National Laboratory.)...

Do authorized employees know the adequate methods and means of isolating hazardous energy sources [29 CFR 1910.147 (c)(7XiXA)] Are affected employees instructed by their supervisor on the purpose and use of energy control procedures [29 CFR 1910.147 (cXTXi) (B)]... 

FHA is a powerful, efficient, and comprehensive system safety analysis technique for the discovery of hazards. It is especially powerful for the safety assessment of software. Since software does not have discrete failure modes as hardware does, the best way to identify software-related hazards is by evaluating the effect of potential software functions failing. Software is built upon performing functions therefore, FHA is a very natural and vital tool. After a functional hazard is identified, further analysis of that hazard may be required to determine if the causal factors of the functional failure are possible. Since the FHA focuses on functions, it might overlook other types of hazards, such as those dealing with hazardous energy sources, sneak circuit paths, and hazardous material (HAZMAT). For this reason, the FHA should not be the sole HA performed, but should be done in support of other types of HA, such as PHA and SSHA. 

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