Lockout tagout (LOTO) is a safety management method to effectively control dangerous energy. According to the U.S. department of labor, nearly 10 percent of accidents are related to "uncontrolled dangerous energy." There are at least two standards in current us standards concerning Hazardous Energy Control, such as OSHA 29 CFR 1910· 147 a Con Hazardous 01 of Hazardous Energy, ANSI/ASSE z244· 1 1 1 2 3 (R2 open 8)Control of Hazardous Energy Lockout/ Tagout and Alternative Methods, Among them, OSHA standard (occupational safety and health standards of the United States) is the most widely used, and is the standard advocated by countries. Lockout tagout has been highly valued and widely implemented by governments, organizations, enterprises and employees in many European and American countries. At home, Lockout tagout has gradually gained recognition and attention with the acceleration of the process of being in line with the international standards and the increasing pursuit of production safety.
Use Lockout tagout correctly
First, the HSE (health, safety, environment) department or maintenance management department in the enterprise should develop detailed hazardous energy control procedures. Secondly, for employees, including equipment maintenance, equipment operators, knowledge about dangerous energy, dangerous energy injury cases, the energy control procedures, Lockout tagout method of use and other aspects of training process, tools, and to all maintenance personnel and some necessary equipment operators are locked up for authorization, and Lockout tagout process CARDS, or instrument that is issued. Third, develop hazardous energy isolation measures for the equipment in the enterprise. Fourth, the implementation of hazardous energy requirements are different, so the design should take into account the two kinds of welding seams, as well as the accessibility requirements of scanning direction. Since the in-service inspection accessibility requirements of this welding seam were not fully considered in the initial design, it is necessary to change the length and structure layout of the fluctuating pipe and safe pressure relief pipe as well as the safety end to meet the in-service inspection accessibility requirements of the welding seam. Although this change meets the requirements of the reachableness of the welding seam of the pipe, it fails to comprehensively consider the length and size of the wave pipe in the initial design, resulting in a certain size overlap between the wave pipe and the pipe. It can be seen that design changes to meet accessibility requirements may have an impact on related equipment and pipelines. Therefore, the design form should be considered comprehensively, and the reliability and integrity of the equipment should be maintained while meeting the accessibility requirements.
In-service inspection is an important means to maintain the safety and reliability of equipment. Designers should have such a sense, and clear design concept and purpose.