This standard specifies the requirements, test methods, inspection rules (end-of-manufacturing inspection and type test) and marking, packaging and storage of explosion-proof electromagnet valves in coal mine.
This standard is applicable to the two-position two-way explosion-proof electromagnet valves in coal mine (hereinafter referred to as “electromagnet valves”) whose working medium is water.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all the editions listed are valid. All standards are subject to revision, and all parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.
GB 191-90 Packaging - Pictorial marking for handling of goods
GB/T 998-82 Basic testing method of low voltage apparatus
GB/T 2423.1-89 Basic environmental testing procedures for electric and electronic products - Tests A: cold
GB/T 2423.2-89 Basic environmental testing procedures for electric and electronic products - Tests B: Dry heat
GB/T 2423.4-93 Basic environmental testing procedures for electric and electronic products - Test Db: damp heat, cyclic
GB/T 2423.5-1995 Environmental testing for electric and electronic products - Part 2: test methods - Test Ea and guidance: shock
GB/T 2423.10-1995 Environmental testing for electric and electronic products－Part 2: test methods Fc and guidance: vibration (sinusoidal)
GB 3836.1-83 Electrical apparatus for explosive atmospheres - General requirements
GB 3836.2-83 Electrical apparatus for explosive atmospheres - Flameproof electrical apparatus d
GB/T 4942.2-93 Degrees of protection provided by enclosures for low-voltage apparatus
GB/T 6388-86 Transport package shipping mark
GB/T 10111-88 Methods of random sampling by utilizing electronic dices of random number
