GB/T 45821-2025 Turbine compressors for ammonia and urea plant

GB 755-2000 Rotating electrical machines—Rating and performance GB/T 755-2008 Rotating electrical machines—Rating and performance GB/T 755-2019 Rotating electrical machines—Rating and performance GB/T 755-2025 Rotating electrical machines—Rating and performance GB/T 755.2-2003 Methods for determining losses and efficiency of rotating electrical machinery from tests(excluding machines for traction vehicles) GB/T 1174-1992 Cast bearing metals GB/T 1174-2022 Cast bearing alloy GB/T 3141-1994 Industrial liquid lubricants—ISO viscosity classification GB/T 3767-1996 Acoustics—Determination of sound power levels of noise sources using sound pressure—Engineering method in an essentially free field over a reflecting plane GB/T 3767-2016 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Engineering methods for an essentially free field over a reflecting plane 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 3836.3-2000 Electrical apparatus for explosive gas atmospheres—Part 3:Increased safety “e” GB 3836.3-2010 Explosive atmospheres—Part 3:Equipment protection by increased safety "e" GB/T 3836.3-2021 Explosive atmospheres—Part 3:Equipment protection by increased safety “e” 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 3836.5-2004 Electrical apparatus for explosive gas atmosphere—Part 5:Pressurized enclosures"p" GB/T 3836.5-2017 Explosive atmospheres—Part 5:Equipment protection by pressurized enclosure"p" GB/T 3836.5-2021 Explosive atmospheres—Part 5:Equipment protection by pressurized enclosure "p" GB 3836.6-2004 Electrical apparatus for explosive gas atmospheres—Part 6:Oil-immersion"o" GB/T 3836.6-2017 Explosive atmospheres—Part 6:Equipment protection by liquid immersion“o” GB 3836.7-2004 Electrical apparatus for explosive gas atmospheres—Part 7:Powder filling"q" GB/T 3836.7-2017 Explosive atmospheres—Part 7:Equipment protection by powder filling“q” GB 3836.8-2003 Electrical apparatus for explosive gas atmospheres—Part 8:Type of protection “n” GB 3836.8-2014 Explosive atmospheres—Part 8:Equipment protection by type of protection “n” GB/T 3836.8-2021 Explosive atmospheres—Part 8: Equipment protection by type of protection “n” GB 3836.9-1990 Electrical apparatus for explosive atmospheres Encapsulated electrical apparatus "m" GB 3836.9-2006 Electrical apparatus for explosive gas atmospheres—Part 9:Encapsulation "m" GB 3836.9-2014 Explosive atmospheres—Part 9:Equipment protection by type of protection “m” GB/T 3836.9-2021 Explosive atmospheres—Part 9:Equipment protection by encapsulation “m” GB 3836.11-1991 Electrical apparatus for explosive atmospheres-Method of test for ascertainment of maximum experimental safe gap GB/T 3836.11-2008 Explosive atmospheres—Part 11:Equipment protection by flameproof enclosures “d”—Method of test for ascertainment of maximum experimental safe gap GB/T 3836.11-2017 Explosive atmospheres—Part 11:Material characteristics for gas and vapour classification—Test methods and data GB/T 3836.11-2022 Explosive atmospheres—Part 11:Material characteristics for gas and vapour classification—Test methods and data GB 3836.12-1991 Electrical apparatus for explosive atmospheres—Classification of gases or vapours with air according to their maximum experimental safe gaps and minimum igniting currents GB/T 3836.12-2008 Explosive atmospheres—Part 12:Classification of mixtures of gases or vapours with air according to their maximum experimental safe gaps and minimum igniting current GB/T 3836.12-2019 Explosive atmospheres—Part 12:Material characteristics for combustible dusts—Test methods GB 3836.13-1997 Electrical apparatus for explosive gas atmospheres—Part 13:Repair and overhaul for apparatus used in explosive gas atmospheres GB 3836.13-2013 Explosive atmospheres—Part 13:Equipment repair,overhaul and reclamation GB/T 3836.13-2021 Explosive atmospheres—Part 13:Equipment repair,overhaul,reclamation and modification GB 3836.14-2000 Electrical apparatus for explosive gas atmospheres—Part 14:Classification of hazardous areas GB 3836.14-2014 Explosive atmospheres—Part 14:Classification of areas—Explosive gas atmosphere GB 3836.15-2000 Electrical apparatus for explosive gas atmospheres—Part 15:Electrical installations in hazardous areas (other than mines) GB/T 3836.15-2017 Explosive atmospheres—Part 15:Electrical installations design,selection and erection GB/T 20801.5-2025 Pressure piping code—Part 5:Hydrogen piping and pipelines GB/T 20801.6-2006 Pressure piping code—Industrial piping—Part 6:Safeguarding GB/T 20801.6-2020 Pressure piping code—Industrial piping—Part 6:Safeguarding GB/T 25630-2010 Turbocompressors—Performance test code GB/T 28574-2012 Petroleum,petrochemical and natural gas industries steam turbines—Special-purpose applications GB 31571-2015 Emission standard of pollutants for petroleum chemistry industry GB/T 37400.12-2019 Heavy mechanical general technical specification—Part 12:Painting GB/T 42601.1-2023 Petroleum,petrochemical and natural gas industries—Lubrication,shaft-sealing and control-oil systems and auxiliaries—Part 1:General requirements HG/T 20615 HG/T 20623 JB/T 2977-2005 Industrial fan, blower, and compressor terminology NB/T 47013.2-2015 Non-destructive testing of pressure equipment - Part 2: Radiographic testing NB/T 47013.3-2023 Non-destructive testing of pressure equipment - Part 3: Ultrasonic testing NB/T 47013.3-2015 Non-destructive testing of pressure equipment - Part 3: Ultrasonic testing NB/T 47013.5-2015 Non-destructive testing of pressure equipment - Part 5: Penetrant testing ISO 6368 ISO 10438-2 ISO 10439-1：2015 ISO 10439-2 ISO 10441 ISO 13691