99热这里只有精品6_无码精油按摩潮喷在_天天摸天天碰天天添_美女扒开内裤无遮挡18禁免费观看【_蛮好的人生在线观看免费高清_公媳谢莹李瑞峰免费阅读_在线+国产+无码_无码国产精品一区二区免费l_国产成人精品三级在线观看

一、 Introduction to Coal Safety/Mine Safety Certification System

Coal safety and mining safety certification, abbreviated as MA/KA certification, is a unique safety mark certification system in China that must be obtained for equipment and products used in coal mines and non coal mining areas. The implementation of a safety production certification system for equipment, instruments, meters, and other facilities used in underground coal mines has effectively curbed the entry of counterfeit and inferior products. The implementation of a safety production labeling system is an effective method.

Coal safety and mine safety are just one word apart, and many customers are confused about whether their products need to apply for coal safety certification or mine safety certification. What are the connections and differences between these two types of certificates regarding our country's unique safety certification system for underground equipment?

二、 The difference between coal safety/mine safety certification

1. The difference in definition. Coal safety certification, abbreviated as MA certification, as the name suggests, is used underground in coal mines. Mining safety certification, also known as KA certification, is used for other metal or non-metal mines that are not coal mines, which is the essential difference.

2. Testing is different. In the stage of type inspection, their testing is also very different. In terms of performance, coal safety certified products and mine safety certified products are inspected according to the same industry standards. However, in terms of safety performance, the coal safety certification of electrical equipment requires explosion-proof testing, based on the national explosion-proof standard GB/T 3836 and the MT coal mine industry standard. The safety performance of equipment certified for mine safety must be inspected according to relevant product performance standards. Coal safety certification tends to focus more on preventing explosions, while mine safety certification tends to focus more on the protective performance of the shell, which is the difference between their type tests.

三、 Contact for Coal Safety/Mine Safety Certification

1. Applicant. The coal safety certification certificate and mining safety certification certificate must be obtained directly from the factory or OEM enterprise (which can be applied for OEM can be consulted with us)

2. Issuing agency. The issuing agencies for coal safety certification and mining safety certification are the same, both issued and managed by the National Safety Standards Center;

3. Factory audit. The factory audit required for the application of coal safety and mining safety certification certificate is based on the implementation specifications of the factory's quality assurance capability products. Products that have obtained the coal safety certification certificate can easily obtain the mine safety certification certificate through a conversion process, while the opposite is not possible.

The copyright of this article belongs to Zhongnuo Testing. Plagiarism and theft will be pursued. Reproduction must indicate the original source.