At present, hazardous chemical production enterprises in China are prone to frequent accidents, therefore, it is required to attach great importance to safety production testing and inspection. We should gradually explore the safety performance of products and equipment related to personal safety, and gradually form an important role in safety production testing and inspection. Now, through safety testing, a lot of technical support can be provided to hazardous chemical enterprises, and electrical explosion-proof safety testing should be widely promoted to continuously provide guidance and services for enterprise safety production.
1Unreasonable design in hazardous areas
Many companies are constrained by their business history, and at the same time, their production materials are constantly changing, making the division of hazardous areas not very regular and appearing chaotic, and the layout of equipment and facilities cannot meet the requirements of explosion prevention.
2My understanding of explosion-proof knowledge is relatively weak
In many hazardous chemical enterprises, electrical explosion-proof safety testing is not distinguished from fire electrical and building electrical testing. In terms of temporary electricity and hot work operations, as well as equipment replacement and electrical management systems, they are not standardized.
3Unreasonable installation of explosion-proof electrical facilities
Although many companies now use explosion-proof functions in their electrical facilities, there are still many problems in installation, such as direct overlap of mainline wiring, missing screws on explosion-proof surfaces, and using PVC pipes to thread in and out of pipeline pipes. The installation of switches, sockets, wiring terminals, power and lighting distribution boxes, grounding systems, wiring and electrical wiring systems is not very reasonable, and there are many safety issues.
4Explosion proof electrical wiring does not meet the requirements
In explosive environments, most companies nowadays do not pay enough attention to the wiring of explosion-proof electrical circuits, and cannot correctly understand the technical parameters of hazardous materials in dangerous places. Often, wiring is done arbitrarily.
5Improper grounding of explosion-proof electrical facilities
For the grounding of explosion-proof electrical facilities, there are mainly internal grounding, shell protection grounding, and anti-static grounding. The protective grounding of non electrified metal shells is not done well, and it is common to connect the grounding wire to the material pipeline.
6Lack of overall planning for explosion-proof areas in the locations selection of distribution rooms and control rooms
Many distribution rooms and control rooms are located in explosion-proof zones without proper explosion-proof measures in place.
7The explosion-proof selection and requirements of explosion-proof electrical facilities do not meet the requirements
In terms of electrical explosion-proof facilities, they are not distinguished between combustible dust environments and explosive gas environments, and are used interchangeably. However, in different hazardous areas, they have different electrical explosion-proof regulations, explosion-proof signs, types, as well as different levels and temperature groups. A large number of enterprises mix explosion-proof electrical facilities without distinguishing these differences.
As a professional explosion-proof testing organization, Zhongnuo Testing can not only provide safety testing services for explosion-proof electrical equipment in use for chemical enterprises, but also provide professional explosion-proof construction and renovation services for non compliant items, safeguarding the safe development of chemical enterprises!
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