2021 year China issued GB standards list


	GB/T 24347-2021 DC/DC converter for electric vehicles 电动汽车DC/DC变换器
	GB/T 25915.10-2021 Cleanrooms and associated controlled environments—Part 10: Classification of surface cleanliness by chemical concentration 洁净室及相关受控环境第10部分：按化学物浓度划分表面洁净度等级
	GB/T 25915.1-2021 Cleanrooms and associated controlled environments—Part 1: Classification of air cleanliness by particle concentration 洁净室及相关受控环境第1部分：按粒子浓度划分空气洁净度等级
	GB/T 25915.2-2021 Cleanrooms and associated controlled environments—Part 2: Monitoring to provide evidence of cleanroom performance related to air cleanliness by particle concentration 洁净室及相关受控环境第2部分：洁净室空气粒子浓度的监测
	GB/T 11270.2-2021 Superabrasive products—Diamond circular saw blade—Part 2:Sintered saw blades 超硬磨料制品金刚石圆锯片第2部分：烧结锯片
	GB/T 14172-2021 Bench test methods of static roll stability for motor vehicles, trailers and combination vehicles 汽车、挂车及汽车列车静侧倾稳定性台架试验方法
	GB/T 40380.1-2021 Metallic powders—Determination of apparent density and flow rate at elevated temperatures—Part 1: Determination of apparent density at elevated temperatures 金属粉末高温时松装密度和流速的测定第1部分：高温时松装密度的测定
	GB/T 40491-2021 Guide for specialized farmers cooperatives development 农民专业合作社建设指南
	GB/T 40493-2021 Determination of lead, cadmium, chromium and mercury content in the finishing material of wood-based panel 人造板饰面材料中铅、镉、铬、汞重金属元素含量测定
	GB/T 40497-2021 Evaluation principles for the design of offshore facilities against fire and blast loading 海上设施防火与防爆设计评估原则
	GB/T 40498-2021 General principles of drafting energy consumption norm standards for public institutions 公共机构能耗定额标准编制通则
	GB/T 40499-2021 General condition of vehicle dynamics test for heavy vehicles and buses 重型汽车操纵稳定性试验通用条件
	GB/T 18916.55-2021 Norm of water intake—Part 55：Leather 取水定额第55部分：皮革
	GB/T 19963.1-2021 Technical specification for connecting wind farm to power system—Part 1: On shore wind power 风电场接入电力系统技术规定第1部分：陆上风电
	GB/T 20311-2021 Building components and building elements—Thermal resistance and thermal transmittance—Calculation methods 建筑构件和建筑单元热阻和传热系数计算方法
	GB/T 40373-2021 Single-use face mask manufacturing and packaging production line—General technical requirements 一次性口罩制造包装生产线通用技术要求
	GB/T 10715-2021 Belt drives—V-ribbed belts, joined V-belts and V-belts including wide section belts and hexagonal belts—Electrical conductivity of antistatic belts: Characteristics and methods of test 带传动多楔带、联组V带及包括宽V带、六角带在内的单根V带抗静电带的导电性:要求和试验方法
	GB/T 40377-2021 Corrosion of metals and alloys—Determination of AC corrosion—Protection criteria 金属和合金的腐蚀交流腐蚀的测定防护准则
	GB/T 26495-2021 Magneium alloy die casting for steering wheel armature 镁合金压铸转向盘骨架坯料
	GB/T 1727-2021 General methods for preparation of coating films 漆膜一般制备法

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