GB 50058-2014 Translated English of Chinese Standard. GB50058-2014: Code for design of electrical installations in explosive atmosphereshttps://www.chinesestandard.net, 2017 M01 8 - 83 pages In order to standardize the design of electrical instillations in explosive atmosphere, make electrical installations in explosive atmosphere follow the policies of prevention first, guarantee the personal and property safety and take preventive measures according to circumstances, this Code is hereby developed. |
Contents
| 4 | |
Explosive gas atmosphere | 11 |
Explosive dust atmosphere | 18 |
Annex A Example drawing and condition of classification of explosive hazardous area | 33 |
Grading and grouping of explosive gas or vapor mixture | 54 |
Typical example drawing of extension of hazardous area in explosive dust | 70 |
Annex E Example of characteristics of combustible dust | 76 |
Explanation of wording in this Code | 82 |
Common terms and phrases
100 Non-conductive IIIB Area 1 Area Area 22 area is classified area shall conform cable cathodic protection Centered on release Classification of explosive classified as Area Continued Table continuous-grade source cyclone separator cylinder design of electrical dust layer electrical equipment electrical installations enclosed area Equipment protection level Explosion Protection explosive atmosphere explosive dust atmosphere explosive dust environment explosive gas atmosphere explosive gas mixture explosive hazardous area first-grade source flammable gas flammable liquid Flash point following regulations formula Grading Grouping Fused gas or vapor Gaseous Grouping of ignition gutter heavier than air hopper II A T2 installations in explosive Intrinsic safety liquid surface lower explosive limit materials are heavier Methyl Molecular formula Grading normal operation Poorly-ventilated powder production equipment area radius of 4.5 Relative density Relative density Lower release flammable material second-grade source SN Name source of release steel pipe substance Molecular formula Table C SN temperature of dust well-ventilated