久久大全_国产传媒视频在线观看_婷婷在线免费_91人人看_亚洲视频在线观看_2020亚洲天堂

What does the explosion-proof mark Ex d IIC T6 Gb mean?

On regular explosion-proof electrical equipment, there will be an Ex mark, and each explosion-proof electrical equipment will have a unique explosion-proof mark. Taking the following explosion-proof marks as an example: Note 1: Ex is the explosion-proof mark of China and the International Electrotechnical Commission, i……

What items are tested for explosion-proof certification?

Conventional explosion-proof testing items for explosion-proof electrical equipment: Note: The general testing items listed in this table are applicable to explosion-proof, increased safety, intrinsic safety, and general mining electrical equipment. There may be differences according to the actual situation of the prod……

How long is the validity period of the explosion-proof certificate?

Does the domestic explosion-proof certificate have an expiration date? What is the validity period? End users of explosion-proof electrical products often face such problems. In fact, the explosion-proof certificate has a validity period. Currently, the validity period of domestic explosion-proof certificates is genera……

What documents are required to apply for an explosion-proof certificate?

The required documents for applying for an explosion-proof certificate include: 1. A copy of the enterprise qualification certificate and business license (at the time of initial inspection), a letter of authorization from the unit, or an application letter. 2. According to the provisions of GB3836.1-2000, the enterpri……