2021 year China issued GB standards list


	GB/T 18996-2021 Silver jewellery alloys—Determination of silver—Volumetric (potentiometric) method using sodium chloride or potassium chloride 银合金首饰银含量的测定氯化钠或氯化钾容量法(电位滴定法)
	GB/T 11888-2021 首饰指环尺寸定义、测量和命名首饰指环尺寸定义、测量和命名
	GB/T 40927-2021 Leather—Physical and mechanical tests—Determination of heat resistance of patent leather 皮革物理和机械试验漆皮耐热性能的测定
	GB/T 40938-2021 Leather—Physical and mechanical tests—Determination of water penetration pressure 皮革物理和机械试验水渗透压测定
	GB/T 40920-2021 Leather—Tests for colour fastness—Colour fastness to cycles of to-and-fro rubbing 皮革色牢度试验往复式摩擦色牢度
	GB/T 17215.231-2021 Electricity metering equipment(AC)—General requirements, tests and test conditions—Part 31:Product safety requirements and tests 电测量设备（交流）通用要求、试验和试验条件第31部分：产品安全要求和试验
	GB/T 40906-2021 Methods for the determination of prohibited substances in furniture products and related materials—Certain phthalate esters 家具产品及其材料中禁限用物质测定方法邻苯二甲酸酯增塑剂
	GB/T 17144-2021 Petroleum products—Determinatioan of carbon residue—Micro method 石油产品残炭的测定微量法
	GB/T 40396-2021 Test method for glass transition temperature of polymer matrix composites—Dynamic mechanical analysis（DMA）聚合物基复合材料玻璃化转变温度试验方法动态力学分析法（DMA）
	GB/T 40395-2021 Determination of ammonium in methanol for industrial use—Ion chromatography 工业用甲醇中铵离子的测定离子色谱法
	GB/T 40713-2021 General technical requirements for complete sets of building ceramics production equipment 建筑陶瓷生产成套装备通用技术要求
	GB/T 40597-2021 Power quality planning—General 电能质量规划总则
	GB/T 40394-2021 Determination of trace trimethylamine in methanol for industrial use—Gas chromatography-mass spectrometry 工业用甲醇中痕量三甲胺含量的测定气相色谱质谱联用法
	GB/T 10395.20-2021 Agricultural and forestry machinery—Safety—Part 20:Pick-up balers 农林机械安全第20部分：捡拾打捆机
	GB/T 40871-2021 Film laminated steel sheet and strip 塑料薄膜热覆合钢板及钢带
	GB/T 18257-2021 Hot-face identification marking of refractory bricks for use in rotary kilns 回转窑用耐火砖热面标记
	GB/T 51438-2021 Standard for design of shield tunnel engineering 盾构隧道工程设计标准
	GB/T 40392-2021 Detection of Legionella in circulating cooling water 循环冷却水中军团菌的检测
	GB/T 26548.10-2021 Hand-held portable power tools -- Test methods for evaluation of vibration emission -- Part 10: Percussive drills, hammers and breakers 手持便携式动力工具? 振动试验方法? 第10部分：冲击式凿岩机、锤和破碎器
	GB/T 40701-2021 Electric multiple units gear oils 动车组驱动齿轮箱润滑油

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