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GB/T 16425-2018 粉尘云爆炸下限浓度测定方法 Determination for minimum explosive concentration of dust clouds
本标准规定了粉尘-空气混合物爆炸下限浓度测定的试验装置、试验程序、其他可替代的试验方法、安全措施和试验报告。<br />本标准适用于依赖空气中的氧维持其氧化反应的可燃粉尘。<br />本标准不适用于火炸药或不依赖空气中的氧即可燃烧爆炸的物质。...
2023-07-20 11:00:01浏览:19
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DB13/T 1235-2010 化工产品结晶点测定方法 Determination for crystallizing point for chemical products
本标准规定了化工产品结晶点的测定方法。<br />本标准适用于结晶点在-10~150℃范围的化工产品。...
2023-07-18 16:48:01浏览:12
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ASTM E2575-2019 铜和铜合金含氧量测定方法 Standard Test Method for Determination of Oxygen in Copper and Copper Alloys by Inert Gas Fusion
<div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.1</span> This test method covers the determination of oxygen in copper and copper alloys from 0.00035 % to 0.090 %.</p></div> <div class="SectionLevel2"> <p class="caveat cdone2"><span class="Head3 cdone">1.2</span> <i>This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.</i></p></div> <div class="SectionLevel2"> <p class="WTOcaveat cdone2"><span class="Head3 cdone">1.3</span> <i>This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.</i></p></div>...
2023-07-09 09:24:01浏览:16
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GB/T 40200-2021 工业有机废气净化装置性能测定方法 Method of testing the performance of equipment for industrial organic waste gas purification
本标准规定了工业有机废气净化装置(以下简称“净化装置”)性能测定项目、测定方法、计算方法与报告编写要求。<br />本标准适用于石油、化工、医药、涂装、印刷、纺织、印染、建材、电子、冶炼等行业内使用的额定处理风量不小于150m<sup>3</sup>/h的净化装置的性能测定。其他行业内使用的处理有机废气的净化装置的性能测定可参照本标准执行。...
2023-07-08 06:48:01浏览:19
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GB/T 35052-2018 选煤厂重介质旋流器悬浮液中磁性物含量的测定方法 Magnetite content measurement method for heavy medium suspension used in heavy medium cyclones in coal preparation plant
本标准规定了选煤厂重介质旋流器悬浮液中磁性物含量的测定方法。<br />本标准适用于选煤厂重介质悬浮液中磁性物含量的测定。...
2023-07-06 05:36:01浏览:15
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GB/T 9452-2023 热处理炉有效加热区测定方法
本文件规定了热处理炉按温度均匀性分类,有效加热区初始测定和周期测定、测试系统、测试方法、结果评定、记录与报告以及管理的要求。
本文件适用于测定热处理炉在使用温度范围内满足温度均匀性要求的有效加热区。
本文件不适用于连续加热炉中没有固定的工艺规定加热温度或不要求温度均匀性的加热区。其他加热设备可参照执行。
替代GB/T 9452-2012...2023-07-04 03:00:02浏览:35
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GB/T 42638-2023 煤矿井下煤层瓦斯抽采半径直接测定方法 抽采量法
本文件描述了煤矿井下煤层瓦斯抽采半径直接测定方法的仪器设备测定工艺测定结果确定。
本文件适用于煤矿井下顺层钻孔、穿层钻孔和顺层定向长钻孔抽采半径测定。...2023-07-04 02:12:01浏览:15
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GB/T 42523-2023 铁矿粉 湿容量的测定方法
本文件描述了铁矿粉湿容量的测定方法。
本文件适用于铁精矿以及粒径大于 10 mm的质量比不超过10%的铁矿粉的湿容量的测定。
警示―---使用本文件的人员应有正规实验室工作的实践经验。本文件并未提出所有可能的安全问题。使用者有责任采取适当的安全和健康措施并保证符合国家有关法规规定的条件。...2023-06-30 12:12:01浏览:14
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GB/T 3301-2023 日用陶瓷器规格误差和缺陷尺寸的测定方法
本文件描述了日用陶瓷器规格误差(包括容积误差、口径误差、高度误差、质量误差和最大尺寸误差等)和缺陷尺寸的测定方法。
本文件适用于日用陶瓷器规格误差和缺陷尺寸的测定。...2023-06-30 01:12:01浏览:27
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ASTM D7367-2019 水植用纤维覆盖物持水能力测定方法 Standard Test Method for Determining Water Holding Capacity of Fiber Mulches for Hydraulic Planting
<div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.1</span> This quantitative test method determines the water holding capacity of fiber mulches, including wood, paper, and agriculturally derived and blended fiber mulches that are used for hydraulic seeding and planting. Results from this testing can be used as a quality assurance and/or quality control data for manufacturing processes.</p></div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.2</span> There are no known limitations to this test method.</p></div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.3</span> <span class="Head3Title cdone">Units—</span>The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.</p></div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.4</span> All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice <span class="Body-link1 cdone">D6026</span>.</p> <div class="SectionLevel3"> <p class="subsec2 cdone2"><span class="Head4 cdone">1.4.1</span> The procedures used to specify how data are collected/recorded or calculated in the standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering data.</p></div></div> <div class="SectionLevel2"> <p class="caveat cdone2"><span class="Head3 cdone">1.5<...
2023-06-27 02:00:01浏览:14
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GB/T 5003-2023 日用陶瓷器釉面耐化学腐蚀性的测定方法
本文件描述了室温及加热条件下以色差 三角形Eab"表征的日用陶瓷器釉面耐化学腐蚀性能测定方法和性能评价。
本文件适用于日用陶瓷器釉面耐化学腐蚀性能的测定。
替代GB/T 5003-1999...2023-06-24 17:24:01浏览:20
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GB 3836.11-2008 爆炸性环境 第11部分:由隔爆外壳“d”保护的设备 最大试验安全间隙测定方法.pdf
GB 3836.11-2008 爆炸性环境 第11部分:由隔爆外壳“d”保护的设备 最大试验安全间隙测定方法.pdf...
2023-06-23 20:12:01浏览:14
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GB3836.11-91爆炸性环境用防爆电气设备 最大试验安全间隙测定方法.pdf
GB3836.11-91爆炸性环境用防爆电气设备 最大试验安全间隙测定方法.pdf...
2023-06-23 15:12:01浏览:17
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DB13/T 1227-2010 有机化工产品中蒸发残渣测定方法 Determination of evaporation residual for organic chemical products
本标准规定了用重量法测定蒸发残渣的方法。<br />本标准适用于有机化工产品蒸发残渣的测定。...
2023-06-21 16:00:01浏览:30
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ASTM E561-2015 K-R曲线测定方法 Standard Test Method for KR Curve Determination
1.1 This test method covers the determination of the resistance to fracture of metallic materials under Mode I loading at static rates using either of the following notched and precracked specimens: the middle-cracked tension M(T) specimen or the compact tension C(T) specimen. A KR curve is a continuous record of toughness development (resistance to crack extension) in terms of KR plotted against crack extension in the specimen as a crack is driven under an increasing stress intensity factor, K. 1.2 Materials that can be tested for KR curve development are not limited by strength, thickness, or toughness, so long as specimens are of sufficient size to remain predominantly elastic to the effective crack extension value of interest. 1.3 Specimens of standard proportions are required, but size is variable, to be adjusted for yield strength and toughness of the materials. 1.4 Only two of the many possible specimen types that could be used to develop KR curves are covered in this method. 1.5 The test is applicable to conditions where a material exhibits slow, stable crack extension under increasing crack driving force, which may exist in relatively tough materials under plane stress crack tip conditions. 1.6 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use....
2023-06-20 06:00:01浏览:35
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