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GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards;  We provide Chinese GB standards and English version GB standards  Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services.
  •  China "DN" GB Standards List:
  • Standard  Code Standard Title Standard Class Order
    GB/T 6739-2022 Paints and varnishes - Determination of film harDNess by the pencil method
    色漆和清漆 铅笔法测定漆膜硬度
    China National Standards
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    GB/T 42086.2-2022 Hydraulic transmission connection - Flange connection - Part 2: 42 MPa, DN13~DN76 series
    液压传动连接 法兰连接 第2部分: 42 MPa、DN13~DN76系列
    China National Standards
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    GB/T 42086.1-2022 Hydraulic transmission connection flange connection Part 1: 3.5 MPa ~ 35 MPa, DN13 ~ DN127 series
    液压传动连接 法兰连接 第1部分:3.5 MPa~35 MPa、DN13~DN127系列
    China National Standards
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    GB/T 39693.8-2022 Vulcanized rubber or thermoplastic rubber - Determination of harDNess - Part 8: Determination of apparent hardness of rubber rollers by Zhao's hardness (P&J) method
    硫化橡胶或热塑性橡胶 硬度的测定 第8部分:赵氏硬度(P&J)法测定胶辊的表观硬度
    China National Standards
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    GB/T 39693.7-2022 Vulcanized rubber or thermoplastic rubber - Determination of harDNess - Part 7: Determination of the apparent hardness of rubber rollers by the Shore hardness method
    硫化橡胶或热塑性橡胶 硬度的测定 第7部分:邵氏硬度法测定胶辊的表观硬度
    China National Standards
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    GB/T 42216.3-2022 Molecular in vitro diagnostic tests - Specification for preexamination procedures of formalin-fixed and paraffin-embedded tissues - Part 3: Isolation of DNA
    分子体外诊断检验 福尔马林固定及石蜡包埋组织检验前过程的规范 第3部分:分离DNA
    China National Standards
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    GB/T 41895-2022 Determination of DNA virus in cells MNP labeling method
    细胞中DNA病毒测定 MNP标记法
    China National Standards
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    GB/T 41844-2022 Specifications for the prevention and control of human-originated contamination of DNA testing products
    DNA检验用产品人源性污染防控规范
    China National Standards
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    GB/T 41689-2022 Soil Quality Methods for Direct DNA Extraction from Soil Samples
    土壤质量 土壤样品直接提取DNA的方法
    China National Standards
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    GB/T 41579-2022 Nuclear Facility Emergency PrepareDNess Classification
    核设施应急准备分类
    China National Standards
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    GB/T 17394.3-2022 Metallic materials - Leeb harDNess test - Part 3: Calibration of standard hardness blocks
    金属材料 里氏硬度试验 第3部分:标准硬度块的标定
    China National Standards
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    GB/T 17394.2-2022 Metallic materials - Leeb harDNess test - Part 2: Inspection and calibration of hardness testers
    金属材料 里氏硬度试验 第2部分:硬度计的检验与校准
    China National Standards
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    GB/T 230.3-2022 Metallic materials - Rockwell harDNess test - Part 3: Calibration of standard hardness blocks
    金属材料 洛氏硬度试验 第3部分:标准硬度块的标定
    China National Standards
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    GB/T 21838.3-2022 Metallic materials - Instrumented indentation tests for harDNess and material parameters - Part 3: Calibration of standard blocks
    金属材料 硬度和材料参数的仪器化压入试验 第3部分:标准块的标定
    China National Standards
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    GB/T 21838.2-2022 Metallic materials - Instrumented indentation tests for harDNess and material parameters - Part 2: Verification and calibration of testing machines
    金属材料 硬度和材料参数的仪器化压入试验 第2部分:试验机的检验和校准
    China National Standards
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    GB/T 231.3-2022 Metallic materials - Brinell harDNess test - Part 3: Calibration of standard hardness blocks
    金属材料 布氏硬度试验 第3部分:标准硬度块的标定
    China National Standards
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    GB/T 231.2-2022 Metallic materials - Brinell harDNess test - Part 2: Inspection and calibration of hardness testers
    金属材料 布氏硬度试验 第2部分:硬度计的检验与校准
    China National Standards
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    GB/T 230.2-2022 Metallic materials - Rockwell harDNess test - Part 2: Inspection and calibration of hardness testers and indenters
    金属材料 洛氏硬度试验 第2部分:硬度计及压头的检验与校准
    China National Standards
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    GB/T 41615-2022 Information items and data structures of biological samples and sampled persons in forensic scientific DNA database
    法庭科学 DNA数据库中生物检材和被采样人信息项及其数据结构
    China National Standards
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    GB/T 18449.4-2022 Metallic materials—Knoop harDNess test—Part 4: Tables of hardness values
    金属材料 努氏硬度试验 第4部分: 硬度值表
    China National Standards
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    GB/T 4340.4-2022 Metallic materials—Vickers harDNess test—Part 4:Tables of hardness values
    金属材料 维氏硬度试验 第4部分: 硬度值表
    China National Standards
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    GB/T 1927.19-2021 Test methods for physical and mechanical properties of small clear wood specimens—Part 19: Determination of static harDNess
    无疵小试样木材物理力学性质试验方法 第19部分:硬度测定
    China National Standards
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    GB/T 41009-2021 Forensic sciences -- Data structures of selected loci from the DNA database
    法庭科学? DNA数据库选用的基因座及其数据结构
    China National Standards
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    GB/T 41021-2021 Forensic sciences -- Content and format of DNA identification report
    法庭科学? DNA鉴定文书内容及格式
    China National Standards
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    GB/T 41185-2021 Specification of preparation and quality control of reference materials for DNA detection of aquatic animals pathogen -- Plasmid
    水生动物病原DNA检测参考物质制备和质量控制规范 质粒
    China National Standards
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    GB/T 27552-2021 Destructive tests on welds in metallic materials—MicroharDNess testing of welded joints
    金属材料焊缝破坏性试验 焊接接头显微硬度试验
    China National Standards
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    GB/T 40696-2021 Information technology—Telecommunications and information exchange between systems—Network joint scheduling based on SDN
    信息技术 系统间远程通信和信息交换 基于SDN的网络联合调度
    China National Standards
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    GB/T 39693.9-2021 Rubber, vulcanized or thermoplastic—Determination of harDNess—Part 9:Calibration and verification of hardness testers
    硫化橡胶或热塑性橡胶 硬度的测定 第9部分:硬度计的校准和验证
    China National Standards
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    GB/T 40903-2021 Textiles—Identification of some animal fibres by DNA analysis method—Cashmere,wool,yak and their blends
    纺织品 DNA分析法鉴别某些特种动物纤维 山羊绒、绵羊毛、牦牛绒及其混合物
    China National Standards
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    GB/T 40183-2021 Determination of DNA methylation—Pyrosequencing
    DNA甲基化的测定 焦磷酸测序法
    China National Standards
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    GB/T 40171-2021 General rules for determination of magnetic bead DNA extraction and purification kit
    磁珠法DNA提取纯化试剂盒检测通则
    China National Standards
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    GB/T 9790-2021 Metallic materials—Vickers and Knoop microharDNess tests of metallic and other inorganic coatings
    金属材料 金属及其他无机覆盖层的维氏和努氏显微硬度试验
    China National Standards
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    GB/T 39693.3-2021 Rubber, vulcanized or thermoplastic—Determination of harDNess—Part 3:Dead-load hardness using the very low rubber hardness (VLRH) scale
    硫化橡胶或热塑性橡胶 硬度的测定 第3部分:用超低橡胶硬度(VLRH)标尺 测定定试验力硬度
    China National Standards
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    GB/T 39697.1-2020 Rubber or plastics covered rollers—Specifications—Part 1: Requirements for harDNess
    橡胶或塑料包覆辊 规范 第1部分:硬度要求
    China National Standards
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    GB/T 39693.6-2020 Rubber, vulcanized or thermoplastic—Determination of harDNess—Part 6: Apparent hardness of rubber-covered rollers by IRHD method
    硫化橡胶或热塑性橡胶 硬度的测定 第6部分:IRHD法测定胶辊的表观硬度
    China National Standards
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    GB/T 21838.4-2020 Metallic materials—Instrumented indentation test for harDNess and materials parameters—Part 4: Test method for metallic and non-metallic coatings
    金属材料 硬度和材料参数的仪器化压入试验 第4部分:金属和非金属覆盖层的试验方法
    China National Standards
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    GB/T 24523-2020 Metallic materials—Test method for rapid indentation (Brinell type) harDNess testing
    金属材料 快速压入(布氏型)硬度试验方法
    China National Standards
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    GB/T 39535-2020 Test method for shore harDNess of carbon materials
    炭素材料肖氏硬度测定方法
    China National Standards
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    GB/T 39082-2020 Test method of vickers harDNess testing for resistance spot,projection and seam welds
    电阻点焊、凸焊及缝焊接头的维氏硬度试验方法
    China National Standards
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    GB/T 38751-2020 General rules of harDNess test for heat treated parts
    热处理件硬度检验通则
    China National Standards
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    GB/T 9966.5-2020 Test methods for natural stone--Part 5: Determination of harDNess
    天然石材试验方法 第5部分:硬度试验
    China National Standards
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    GB/T 36702.2-2020 Irrigation equipment—Safety devices for chemigation—Part 2: Chemigation valve assemblies from DN 75(3〞) to DN 350(14〞)
    灌溉设备 化学灌溉用安全装置 第2部分:DN 75(3〞)至 DN 350(14〞)的化学灌溉阀组件
    China JB-Machinery Industry Standards
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    GB/T 51373-2019 Standard for design of environmental protection engineering of orDNance industry
    兵器工业环境保护工程设计标准
    China National Standards
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    GB/T 37900-2019 Test method of harDNess and fracture toughness for ultra-thin glass—Low-load vickers hardness indentation method
    超薄玻璃硬度和断裂韧性试验方法 小负荷维氏硬度压痕法
    China National Standards
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    GB/T 37782-2019 Metallic materials—Indentation test—Determination of strength, harDNess and stress-strain curve
    金属材料 压入试验 强度、硬度和应力-应变曲线的测定
    China National Standards
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    GB/T 26237.14-2019 Information technology—Biometric data interchange formats—Part 14: DNA data
    信息技术 生物特征识别数据交换格式 第14部分:DNA数据
    China National Standards
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    GB/T 21838.1-2019 Metallic materials—Instrumented indentation test for harDNess and materials parameters—Part 1:Test method
    金属材料 硬度和材料参数的仪器化压入试验 第1部分:试验方法
    China National Standards
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    GB/T 230.1-2018 Metallic materials—Rockwell harDNess test—Part 1:Test method
    金属材料 洛氏硬度试验 第1部分: 试验方法
    China National Standards
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    GB/T 231.1-2018 Metallic materials—Brinell harDNess test—Part 1: Test method
    金属材料 布氏硬度试验 第1部分: 试验方法
    China National Standards
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    GB/T 36389-2018 T4 DNA ligase
    T4 DNA连接酶
    China National Standards
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    GB/T 35085-2018 Destructive tests on welds in metallic materials—Vickers and Knoop HarDNess testing of joints welded by laser and electron beam
    金属材料焊缝破坏性试验 激光和电子束焊接接头的维氏和努氏硬度试验
    China National Standards
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    GB/T 36136-2018 General requirements of DNA array-based M.tuberculosis drug resistance detection
    结核分枝杆菌耐药基因芯片检测基本要求
    China National Standards
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    GB/T 6909-2018 Analysis of water used in boiler and cooling system—Determination of harDNess
    锅炉用水和冷却水分析方法 硬度的测定
    China National Standards
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    GB/T 2490-2018 Bonded abrasive products—HarDNess grade measurement
    固结磨具 硬度检验
    China National Standards
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    GB/T 36433-2018 Textiles—DNA quantitative analysis of cashmere and wool mixture—Fluorescence PCR method
    纺织品 山羊绒和绵羊毛的混合物DNA定量分析 荧光PCR法
    China National Standards
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    GB/T 36755-2018 BST DNA polymerase
    BST DNA聚合酶
    China National Standards
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    GB/T 35918-2018 Identification of animal origin in animal products by DNA barcoding—Sanger sequencing
    动物制品中动物源性检测基因条码技术 Sanger测序法
    China National Standards
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    GB/T 3903.4-2017 Footwear—Test methods for whole shoe—HarDNess
    鞋类 整鞋试验方法 硬度
    China National Standards
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    GB/T 35542-2017 Taq DNA polymerase
    Taq DNA聚合酶
    China National Standards
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    GB/T 35541-2017 pfu DNA polymerase
    pfu DNA聚合酶
    China National Standards
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    GB/T 6031-2017 Rubber, vulcanized or thermoplastic—Determination of harDNess (hardness between 10 IRHD and 100 IRHD)
    硫化橡胶或热塑性橡胶 硬度的测定(10IRHD~100IRHD)
    China National Standards
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    GB/T 15670.22-2017 Toxicological test methods for pesticides registration—Part 22:DNA damage and repair/unscheduled DNA synthesis in mammalian cells in vitro
    农药登记毒理学试验方法 第22部分:体外哺乳动物细胞DNA损害与修复/程序外DNA合成试验
    China National Standards
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    GB/T 15670.21-2017 Toxicological test methods for pesticides registration—Part 21: Unscheduled DNA synthesis (UDS) test with mammalian liver cells in vivo
    农药登记毒理学试验方法 第21部分:体内哺乳动物肝细胞程序外DNA合成(UDS)试验
    China National Standards
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    GB/T 3854-2017 Test method for harDNess of reinforced plastics by means of a Barcol impresser
    增强塑料巴柯尔硬度试验方法
    China National Standards
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    GB/T 34205-2017 Metallic materials—HarDNess testing—Ultrasonic contact impedance method
    金属材料 硬度试验 超声接触阻抗法
    China National Standards
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    GB/T 34776-2017 T4 DNA ligase—Detection methods of activity and impurities of enzyme
    T4 DNA连接酶 酶活及杂质检测方法
    China National Standards
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    GB/T 34777-2017 Detection of residual DNA in biological product which expressed from Chinese hamster ovary(CHO) cell—Fluorescent quantitative polymerase chain reaction assay
    中国仓鼠卵巢(CHO)细胞表达产品残留DNA检测 荧光定量PCR法
    China National Standards
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    GB/T 34794-2017 Guidelines for DNA gel purification kit
    琼脂糖凝胶回收试剂盒测定通则
    China National Standards
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    GB/T 34748-2017 Genetic diversity analysis on aquatic germplasm by genomic DNA microsatellite markers
    水产种质资源基因组DNA的微卫星分析
    China National Standards
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    GB/T 34816-2017 Meteorological index of late spring colDNess
    倒春寒气象指标
    China National Standards
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    GB/T 50503-2014 Monitoring and control code for waste water of orDNance industry factory
    兵器工业工厂废水监控规范
    China National Standards
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    GB 15193.10-2014 Food safety national standard vitro mammalian cell DNA damage repair (non procedural DNA synthesis) test
    食品安全国家标准 体外哺乳类细胞DNA损伤修复(非程序性DNA合成)试验
    China National Standards
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    GB/T 14987-2016 Iron-Nickel soft magnetic alloy cold-rolled strips with high harDNess and high electrical resistance
    高硬度高电阻铁镍软磁合金冷轧带材
    China National Standards
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    GB/T 33362-2016 Metallic materials—Conversion of harDNess values
    金属材料 硬度值的换算
    China National Standards
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    GB/T 32660.2-2016 Metallic materials—Webster harDNess test—Part 2: Verification and calibration of hardness testers
    金属材料 韦氏硬度试验 第2部分:硬度计的检验与校准
    China National Standards
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    GB/T 32660.3-2016 Metallic materials—Webster harDNess test—Part 3: Calibration of reference blocks
    金属材料 韦氏硬度试验 第3部分:标准硬度块的标定
    China National Standards
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    GB/T 4341.3-2016 Metallic materials—Shore harDNess test—Part 3: Calibration of reference blocks
    金属材料 肖氏硬度试验 第3部分:标准硬度块的标定
    China National Standards
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    GB/T 4341.2-2016 Metallic materials—Shore harDNess test—Part 2: Verification of hardness testers
    金属材料 肖氏硬度试验 第2部分:硬度计的检验
    China National Standards
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    GB/T 33134-2016 Information security technology—Security requirement of public DNS service system
    信息安全技术 公共域名服务系统安全要求
    China National Standards
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    GB/T 9966.5-2001 Test methods for natural facing stones--Part 5:Test method for shore harDNess
    天然饰面石材试验方法 第5部分:肖氏硬度试验方法
    China National Standards
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    GB/T 9790-1988 Metallic and related coatings--Vickers and Knoop microharDNess tests
    金属覆盖层及其他有关覆盖层 维氏和努氏显微硬度试验
    China National Standards
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    GB/T 9281.1-2008 Clear liquids - Estimation of colour by the GarDNer colour scale - Part 1:Visual method
    透明液体 加氏颜色等级评定颜色 第1部分:目视法
    China National Standards
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    GB/T 9253.2-1999 Petroleum anDNatural gas industries--Threading,gauging,and threadinspection of casing,tubing and line pipe threads
    石油天然气工业 套管、油管和管线管螺纹的加工、测量和检验
    China National Standards
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    GB/T 9097-2016 Sintered metal materials,excluding hardmetals—Determination of apparent harDNess and mincrohardness
    烧结金属材料(不包括硬质合金) 表观硬度和显微硬度的测定
    China National Standards
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    GB/T 9097.1-2002 Sintered metal materials,excluding hardmetals--Determination of apparent harDNess--Part 1:Materials of essentially uniform section hardness
    烧结金属材料(不包括硬质合金)表观硬度的测定 第一部分:截面硬度基本均匀的材料
    China National Standards
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    GB/T 7997-2014 Hardmetals—Vickers harDNess test
    硬质合金 维氏硬度试验方法
    China National Standards
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    GB/T 7962.18-2010 Test methods of colourless optical glass - Part 18: Knoop harDNess
    无色光学玻璃测试方法 第18部分:克氏硬度
    China National Standards
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    GB/T 7702.3-2008 Test method for granular activated carbon from coal - Determination of harDNess
    煤质颗粒活性炭试验方法 强度的测定
    China National Standards
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    GB/T 750-1992 Autoclave method for sounDNess of portland cement
    水泥压蒸安定性试验方法
    China National Standards
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    GB/T 7235-2004 Geometrical Product Specifications(GPS)--Methods for the assessment of departure from rounDNess--Measurement of variations in radius
    产品几何量技术规范(GPS) 评定圆度误差的方法 半径变化量测量
    China National Standards
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    GB/T 7234-2004 Geometrical Product Specifications(GPS)--Measurement of rounDNess--Terms,definitions and parameters of roundness
    产品几何量技术规范(GPS) 圆度测量 术语、定义及参数
    China National Standards
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    GB/T 6909-2008 Analysis of water used in boiler and cooling system - Determination of harDNess
    锅炉用水和冷却水分析方法 硬度的测定
    China National Standards
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    GB/T 6739-2006 Paints and varnishes - Determination of film harDNess by pencil test
    色漆和清漆 铅笔法测定漆膜硬度
    China National Standards
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    GB/T 6367-2012 Surface active agents - Preparation of water with known calcium harDNess
    表面活性剂 已知钙硬度水的制备
    China National Standards
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    GB/T 6031-1998 Rubber,vulcanized or thermoplastic--Determination of harDNess (hardness between 10IRHD and 100 IRHD)
    硫化橡胶或热塑性橡胶硬度的测定(10~100 IRHD)
    China National Standards
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    GB/T 5766-2007 Test method of Rockwell harDNess for friction materials
    摩擦材料洛氏硬度试验方法
    China National Standards
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    GB/T 531.2-2009 Rubber, vulcanized or thermoplastic - Determination of indentation harDNess - Part 2: IRHD pocket meter method
    硫化橡胶或热塑性橡胶 压入硬度试验方法 第2部分:便携式橡胶国际硬度计法
    China National Standards
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    GB/T 531.1-2008 Rubber, vulcanized or thermoplastic - Determination of indentation harDNess - Part 1:Duromerer method (Shore hardness)
    硫化橡胶或热塑性橡胶 压入硬度试验方法 第1部分:邵氏硬度计法(邵尔硬度)
    China National Standards
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    GB/T 4963-2007 Acoustics - Normal equal-louDNess-level contours
    声学 标准等响度级曲线
    China National Standards
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    English PDF
    GB/T 4909.8-2009 Test methods for bare wires - Part 8: HarDNess test - Brinell hardness test
    裸电线试验方法 第8部分:硬度试验 布氏法
    China National Standards
    DN

    English PDF

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