GB/T 7957-2017 General requirements for construction,performance and explosion protected testing of caplights for use in mines susceptible to firedamp (English Version)
This standard specifies the product classification, requirements, test methods, inspection rules and signs of miner's lamps for gas environments. This standard applies to miner's lamps used in coal mine gas environments (Class I), including miner's lamps that are connected to and supply power to other equipment.
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2023GB 7957-2023 Safety technical requirements for miner's lamps used in coal mines
2017GB/T 7957-2017 General requirements for construction,performance and explosion protected testing of caplights for use in mines susceptible to firedamp
2003GB 7957-2003 General requirements for safety of cap lamp
0000 GB/T 7957-1987
GB/T 7957-2017 General requirements for construction,performance and explosion protected testing of caplights for use in mines susceptible to firedamp has been changed from GB 7957-2003 General requirements for safety of cap lamp.
GB/T 7957-2017 General requirements for construction,performance and explosion protected testing of caplights for use in mines susceptible to firedamp has been changed from GB 7957.2-2009 Caplights for use in mines susceptible to firedamp.Part 2:Performance and other safety-related matters.
GB/T 7957-2017 General requirements for construction,performance and explosion protected testing of caplights for use in mines susceptible to firedamp was changed to GB 7957-2023 Safety technical requirements for miner's lamps used in coal mines.