GB 12358-1990 Gas monitors and alarms for workplace atmosphere general technical requirements

GB 12358-2006 Gas monitors and alarms for workplace—General technical requirements

GB/T 2421-1999 Environmental testing for electric and electronic products—Part 1:General and guidance GB/T 2421-2020 Environmental testing—General and guidance GB/T 2421.1-2008 Environmental testing for electric and electronic products—General and guidance GB/T 2421.2-2008 Environmental testing for electric and electronic products—Information for specification writers—Test summaries GB 3836.1-2000 Electrical apparatus for explosive gas atmospheres—Part 1:General requirements GB 3836.1-2010 Explosive atmospheres—Part 1:Equipment—General requirements GB/T 3836.1-2021 Explosive atmospheres—Part 1:Equipment—General requirements GB 3836.2-2000 Electrical apparatus for explosive gas atmospheres—Part 2:Flameproof enclosure “d” GB 3836.2-2010 Explosive atmospheres—Part 2:Equipment protection by flameproof enclosures "d" GB/T 3836.2-2021 Explosive atmospheres—Part 2:Equipment protection by flameproof enclosures “d” GB 3836.4-2000 Electrical apparatus for explosive gas atmospheres—Part 4:Intrinsic safety“i” GB 3836.4-2010 Explosive atmospheres—Part 4:Equipment protection by intrinsic safety "i" GB/T 3836.4-2021 Explosive atmospheres—art 4:Equipment protection by intrinsic safety “i” GB/T 4798.10-1991 Environmental conditions existing in the application of electric and electronic products—Introduction GB/T 4798.10-2006 Environmental conditions existing in the application of electric and electronic products—Guidance GB/T 5274-1985 Gas analysis—Preparation of calibration gas mixtures—Weighing methods GB/T 5274-2008 Gas analysis—Preparation of calibration gas mixtures—Gravimetric method GB/T 5274.1-2018 Gas analysis—Preparation of calibration gas mixtures—Part 1:Gravimetric method for class Ⅰ mixtures GB/T 5275-2005 Gas analysis—Preparation of calibration gas mixtures—Permeation method GB/T 5275.1-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 1:Methods of calibration GB/T 5275.1-2024 Gas analysis—Preparation of calibration gas mixtures using dynamic methods—Part 1:General aspects GB/T 5275.2-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 2:Volumetric pumps GB/T 5275.2-2022 Gas analysis—Preparation of calibration gas mixtures using dynamic methods—Part 2:Piston pumps GB/T 5275.4-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 4:Continuous syringe injection method GB/T 5275.5-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 5:Capillary calibration devices GB/T 5275.6-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 6:Gritical orifices GB/T 5275.6-2023 Gas analysis—Preparation of calibration gas mixtures using dynamic methods—Part 6:Critical flow orifices GB/T 5275.7-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 7:Thermal mass-flow controllers GB/T 5275.8-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 8:Diffusion method GB/T 5275.9-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 9:Saturation method GB/T 5275.10-2009 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 10:Permeation method GB/T 5275.11-2014 Gas analysis—Preparation of calibration gas mixtures using dynamic volumetric methods—Part 11:Electrochemical generation GB/T 4857.5-1992 Packaging--Transport packages--Verticalimpact test method by dropping GB/T 5275.7-2025 Gas analysis—Preparation of calibration gas mixtures using dynamic methods— Part 7:Thermal mass-flow controllers