GB 3836.2 Explosive atmospheres.Part 2:Equipment protection by flameproof enclosures "d"
GB 3836.3 Explosive atmospheres.Part 3:Equipment protection by increased safety "e"
GB 3836.4 Explosive atmospheres.Part 4:Equipment protection by intrinsic safety "i"
GB 4208 Degrees of protection provided by enclosure(IP code)
GB 50251 Code for Design of Gas Transmission Pipeline Engineering
GB/T 13609 Natural gas sampling guidelines*, 2017-12-29 Update
GB/T 13610 Analysis of natural gas composition—Gas chromatography*, 2020-09-29 Update
GB/T 17626.11 Electromagnetic Compatibility Testing and Measurement Techniques Part 11: Voltage Dips, Short Interruptions and Voltage Variation Immunity Tests for Equipment with Input Current Less than or Equal to 16 A per Phase*, 2023-05-23 Update
JJF 1001-2011 General Terms in Metrology and Their Definitions
JJF 1004-2004 Metrological Terms and Their Definitions for Flow Rate
JJF 1094-2002 T.S. for Evaluation of the Characteristics of Measuring Instruments*, 2024-04-20 Update
JJG 1038-2008 Verification Regulation of Goriolis Mass Flow Meters
SY/T 6659-2006 Measurement of natural gas by Coriolis meter
JJF 1591-2016 history
2016JJF 1591-2016 Program of Pattern Evaluation of Coriolis Mass Flow Meters
2008JJG 1038-2008 Verification Regulation of Goriolis Mass Flow Meters
1995JJG 897-1995 Verification Regulation of Mass Flow Meters
JJF 1591-2016 Program of Pattern Evaluation of Coriolis Mass Flow Meters has been changed from JJG 1038-2008 Verification Regulation of Goriolis Mass Flow Meters.