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    GB/T 42177-2022 Technical requirements and test methods for hydrogen valves in hydrogen refueling stations

    China National - YD Standards

    GB/T 42270-2022 Hydrophobicity Test Method of Porous Hydrophobic Membrane

    China National - YD Standards

    GB/T 29729-2022 Basic Requirements for Hydrogen System Safety

    China National - YD Standards

    GB/T 42086.2-2022 Hydraulic transmission connection - Flange connection - Part 2: 42 MPa, DN13¡«DN76 series

    China National - YD Standards

    GB/T 42086.1-2022 Hydraulic transmission connection flange connection Part 1: 3.5 MPa ~ 35 MPa, DN13 ~ DN127 series

    China National - YD Standards

    GB/T 42087-2022 Hydraulic transmission system - Cleaning procedure and cleanliness inspection method

    China National - YD Standards

    GB/T 12085.20-2022 Optics and photonics - Environmental test methods - Part 20: Humid air containing sulfur dioxide, hydrogen sulfide

    China National - YD Standards

    GB/T 23825-2022 Determination of formaldehyde emission in wood-based panels and their products-Gas analysis method

    China National - YD Standards

    GB/T 17396-2022 Hot-rolled seamless steel pipes for hydraulic props

    China National - YD Standards

    GB/T 13747.18-2022 Methods for chemical analysis of zirconium and zirconium alloys - Part 18: Determination of vanadium content - Benzoylphenyl hydroxylamine spectrophotometry and inductively coupled plasma atomic emission spectrometry

    China National - YD Standards

    GB/T 15623.3-2022 Hydraulic transmission - Electrically modulated hydraulic control valves - Part 3: Test methods for pressure control valves

    China National - YD Standards

    GB/T 14043.1-2022 Hydraulic transmission - Identification codes for valves - Part 1: Mounting surfaces and valve holes

    China National - YD Standards

    GB/Z 41983-2022 Hydraulic Screw-in Cartridge Valve Mounting Connection Dimensions

    China National - YD Standards

    GB/T 41981.2-2022 Connections for hydraulic transmissions - Pressure fittings - Part 2: Connectable under pressure

    China National - YD Standards

    GB/T 41981.1-2022 Connections for hydraulic transmissions - Pressure fittings - Part 1: Non-pressurized connections

    China National - YD Standards

    GB/T 20568-2022 Metallic materials - Hydraulic test method for pipe rings

    China National - YD Standards

    GB/T 3452.5-2022 O-ring rubber seals for hydraulic and pneumatic use - Part 5: Specification for elastomeric materials

    China National - YD Standards

    GB/T 21540-2022 Hydraulic transmissions - On-line automatic particle counting systems for liquids - Calibration and verification methods

    China National - YD Standards

    GB/T 17489-2022 Hydraulic transmission Particulate contamination analysis Liquid sampling from working system piping

    China National - YD Standards

    GB/T 31138-2022 hydrogenation machine

    China National - YD Standards

    GB/T 41980.2-2022 Hydraulic transmissions - Determination of pressure fluctuations in systems and components - Part 2: Hydraulic pumps (simplified method)

    China National - YD Standards

    GB/T 41980.1-2022 Hydraulic transmissions - Determination of pressure fluctuations in systems and components - Part 1: Hydraulic pumps (precision method)

    China National - YD Standards

    GB/T 11132-2022 Determination of hydrocarbons in liquid petroleum products - Fluorescence indicator adsorption method

    China National - YD Standards

    GB/T 37770.1-2022 Refrigerated light hydrocarbon fluids - General requirements for automatic level gauges - Part 1: Automatic level gauges for offshore floating storage of liquefied natural gas

    China National - YD Standards

    GB/T 40545-2021 Guidelines of hydraulic fracturing for coalbed methane well

    China National - YD Standards

    GB/T 40297-2021 Seamless austenitic stainless steel pipes for high pressure hydrogenation unit

    China National - YD Standards

    GB/T 32125-2021 Treatment and disposal specification for waste hydrochloric acid solution from industrial manufacture

    China National - YD Standards

    GB/T 17906-2021 Fire emergency rescue equipment¡ªGeneral technical specifications for hydraulically operated rescue tools

    China National - YD Standards

    GB/T 15901-2021 Chemical reagent¡ªCopper£¨¢ò£© chloride dihydrate

    China National - YD Standards

    GB/T 15899-2021 Chemical reagent¡ªManganese sulfate monohydrate

    China National - YD Standards


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