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

Basic knowledge of dust explosion prevention

Explosive dusts include: metal (such as magnesium powder, aluminum powder, titanium powder, etc.), coal (such as coal powder), grain (such as flour, sugar powder, corn powder, potato powder, dry milk ……

View details+

Types and scope of application of explosion-proof certificates

The types of explosion-proof certificates include explosion-proof type (d), increased safety type (e), intrinsic safety type (i), positive pressure type (p), n-type (n), oil filled type (o), sand fill……

View details+

Q&A on Explosion proof Certification

Explosion proof certification refers to the work of determining whether equipment meets the requirements of explosion-proof standards, conducting type tests and routine tests for adaptation, and issui……

View details+

Classification of Dust Explosion proof Electrical Equipment and Dust Explosion proof Signs

Electrical equipment used in dust explosion hazardous areas should be selected as dust explosion-proof electrical equipment in accordance with the current national standard GB 12476.2-2010 "Elect……

View details+

The difference between explosion-proof certification and coal safety certification

Many people always think that the explosion-proof certificate and coal safety certificate are the same, as long as the product obtains the explosion-proof certificate or coal safety certificate, it ca……

View details+

Guidelines for Handling Explosion proof Certificates

Explosion proof certificate refers to a document used to determine whether equipment meets the requirements of standards, type tests, and routine tests for adaptation. The certificate can be for Ex de……

View details+

The meaning of U and X is indicated after the explosion-proof certificate number

The symbol "U" in the explosion-proof certificate is used to represent the symbol of Ex components; The symbol "X" in the explosion-proof certificate represents a symbol for specia……

View details+

Explosion proof rating and certification significance

Explosion proof certification is actually a necessary test that most electrical products must pass and obtain certification certificates for. This is not only a guarantee of product quality promotion,……

View details+

Testing items and handling institutions for C4 anti-corrosion level certification

Testing items and handling institutions for C4 anti-corrosion level certification

View details+

What is the classification of anti-corrosion grade C5?

In 1998, the International Organization for Standardization (ISO) introduced ISO12944 (Corrosion Protection of Steel Structure Protective Coating Systems), which is an international common standard. I……

View details+