在线国产精品视频_成人看片在线观看_性色av一区二区三区_欧美精品一区二区三区在线播放_亚洲欧洲一级片_91一区二区

What is the relationship between explosion-proof certification, explosion-proof qualification certificate, and explosion-proof 3C certification?

Explosion proof certification: Explosion proof certification is the process of determining whether equipment meets the requirements of explosion-proof standards, conducting type tests and routine tests for adaptation, and issuing relevant certificates of conformity. Explosion proof certificate: a document used to deter……

Are the execution standards for explosion-proof certification and explosion-proof 3C certification the same?

Since October 1, 2019, when some explosion-proof electrical equipment was included in the national mandatory product certification catalog, people have been confused about the relationship between the original production license, explosion-proof qualification certificate, and explosion-proof 3C certification. Below is ……

Example of Changes in the Coal Safety Certification Mark of the New GB/T3836 Standard

a) Change from mining explosion-proof type (Ex d I Mb) to mining explosion-proof type (Ex db I Mb); b) The mining explosion-proof and sealing type (Ex d mb I Mb) has been changed to the mining explosion-proof and sealing type (Ex db mb I Mb); c) The explosion-proof and intrinsic safety sound and light alarm, explosion-……

Example of Explosion proof Signs in the New GB/T3836 Standard

Example of Explosion proof Signs: Ex ib I Mb Ex： Electrical equipment for explosion-proof gas environment, symbol ib: protection type is intrinsic safety type I: coal mine gas environment Mb: equipment protection level, can be used in Zone 1 Ex db eb II C T6 Gb Ex: electrical equipment for explosion-proof gas environme……

What do Class II and Class III explosion-proof certificates mean respectively? What are the requirements for processing?

Explosion proof electrical equipment is classified into Class I Explosion proof Certificate, Class II Explosion proof Certificate, and Class III Explosion proof Certificate according to different usage locations. The Class I explosion-proof certificate we refer to refers to the certification certificate used for underg……

What is the qualification certificate for installation, maintenance, and repair of explosion-proof electrical equipment?

Many institutions engaged in engineering construction, especially when it comes to installation and construction in explosive areas, require owners to provide relevant explosion-proof electrical installation and construction qualification certificates, which we call "Explosion proof Electrical Equipment Installati……

The difference between explosion-proof product certification and explosion-proof CCC certification

Since the announcement by the State Administration for Market Regulation in July 2019 on the implementation requirements for the transition from production licensing to mandatory product certification management for explosion-proof electrical and other products, it has been almost two years now. Many companies producin……

What are the requirements for obtaining the certification of explosion-proof electrical installation, repair, and maintenance capabilities?

The certification of explosion-proof electrical installation and maintenance capability is issued by several institutions and can be used for construction in various explosive hazardous areas. As a professional agency for explosion-proof electrical installation, maintenance and repair qualification certificates, Zhongn……

What are the standards for testing and certification of explosion-proof electrical equipment?

This also depends on whether it is for on-site equipment testing or product testing. If it is the testing of equipment used in hazardous areas, it is in accordance with AQ3009-2007 "Electrical Safety and Explosion Prevention Code for Hazardous Areas", and the testing cycle shall not exceed 3 years. If it is p……

In which fields can explosion-proof certification be widely applied

With the continuous improvement of people's awareness of safety production, explosion-proof certification technology has been widely applied in the production and processing of more and more industries such as chemical, petroleum and petrochemical, coatings, pharmaceuticals, food, and dangerous goods logistics. Why? Th……