2014-08-12 05:08:00 [Reproduced by HC Security Network]

Kunshan deflagration accident

At about 7:37 in the morning on August 2, 2014, the automobile wheel polishing workshop of Surongshan Development Zone Zhongrong Metal Products Co., Ltd. exploded during the production process. The explosion killed 75 people and injured 185 people. According to the preliminary judgment, the cause of the accident was that the dust concentration exceeded the standard, and the explosion caused by the fire source was a major accident.

According to the preliminary investigation by the investigation team, there are serious hidden safety hazards in the workshops of the enterprises involved: the design and construction of the second-class dangerous goods sites were not carried out, the double-layer workshop was illegally designed, the production process route was too dense, the dust removal capacity was insufficient, and the dust accumulation in the pipeline was ignored. As a result, the dust concentration exceeds the standard, all electrical equipment in the workshop is not configured according to the explosion-proof requirements, and an explosion occurs in case of fire.

The most easily overlooked thing in many explosive workplaces is that no explosion-proof security equipment is used. Ordinary security equipment will produce arcs and sparks during use (especially in the event of failure), which can easily lead to safety accidents. Let us first look at the current development of explosion-proof security equipment in China.

Explosion-proof security equipment domestic market situation

With the development of the coal, petroleum, and chemical industries, as well as the occurrence of safety accidents, these areas have become the main battlefield of the explosion-proof monitoring industry. At present, there are more than 200 conservative estimates of manufacturers in my country’s explosion-proof monitoring industry, most of them claim that their products have explosion-proof product certification. After years of development, my country’s explosion-proof security electrical equipment can basically meet the requirements of major industrial and mining departments such as coal, petroleum, and chemical industry.

After the explosion in Kunshan, dust explosion became a hot word. According to reports, several people who are (or have been) working at Zhongrong Metal said that the company has no decent training. They only know that the dust must be polluted, and no one knows that it will explode. It is not surprising that the company installed non-explosion-proof electrical products in flammable and explosive environments.

In recent days, relevant government departments across the country have conducted investigations on similar enterprises, and found that there are no fewer enterprises with hidden safety hazards. In order to avoid the re-eating of such accidents, the regulatory authorities require the problematic enterprises to ensure that explosion-proof electrical appliances are installed in the accident-prone working environment to reduce potential safety hazards. At present, most of the companies with hidden dangers of dust explosion are coal mining industry, flour mill, soy sauce factory, feed factory, fireworks factory, woodworking furniture factory, metal processing factory and other enterprises. These types of enterprises are easy to produce dust in the production process. The working conditions of all require the installation of explosion-proof security equipment.

my country is still at an important stage of social and economic transformation. Government supervision cannot cover everything, and many small and medium-sized enterprises ignore production safety. The accident had a huge impact on society, bringing the concept of “safe production” to the general public. The increased awareness of explosion-proof monitoring by enterprises and the public will stimulate the demand for explosion-proof monitoring products, coupled with the continuous promotion of domestic policies, the explosion-proof security market Expansion from the coal mine, petroleum, chemical industry and other industries to industries that are prone to flammable dust conditions, the explosion-proof monitoring industry will enter a golden period of development.

However, there are still many problems in the enterprises involved in explosion-proof security. Some of them do not have the qualification to produce explosion-proof products, and the related products do not have the certificate of explosion-proof products. As a result, the products on the market are uneven. Once these products are used, they will Causes huge security risks.

Problems with current explosion-proof monitoring equipment

Explosive hazardous environments can be divided into two categories: explosive gas environments and combustible dust environments. Combustible dust environments can be subdivided into conductive dust and non-conductive dust. Therefore, each explosion-proof product should be marked or described as explosion-proof Types of. According to the requirements of GB12476 “Electrical Equipment for Combustible Dust Environment”, the explosion-proof marks for dust explosion-proof electrical equipment include: explosion-proof type + combustible dust environment zone + temperature group. The explosion-proof product descriptions and technical indicators on the market simply cannot see the necessary explosion-proof types and standards.

Some small and medium-sized enterprises do not have product development capabilities. Combining the explosion-proof shields, explosion-proof pan/tilts and cameras produced by themselves or other enterprises can be used as an explosion-proof product to promote consumers and deceive consumers. Moreover, many companies blindly produce unqualified products and disturb the market without investigating the market.

According to the data we have, only about 40% of the companies claiming to be able to produce explosion-proof cameras have at least one of the two certificates (product explosion-proof certificate and explosion-proof electrical product production license). Unlicensed production is already illegal. Moreover, if the substandard products produced by it are used by consumers and cause accidents, it will involve everyone.

　 Conclusion:

Although the explosion in Kunshan was not caused by electrical equipment, the dust explosion has entered the public eye. Those who installed in the explosion-hazardous environment in the past that are not explosion-proof security equipment will be required to be replaced. New installations and replacement of explosion-proof security equipment will usher in a new round of sales boom. Many problems in the explosion-proof security industry also need to be solved urgently. After all, hazardous locations are not for general use.