-
GB/T 26282-2021 水泥回转窑热平衡测定方法 Measuring methods of heat balance of cement rotary kiln
本文件规定了生产硅酸盐水泥熟料的各类型回转窑热平衡参数测定前的准备及要求，物料量、物料成分及燃料发热量、物料温度、设备表面散热量、气体的温度、压力、流量、成分、含湿量、含尘浓度等参数的测定方法。<br />本文件适用于生产硅酸盐水泥熟料的各类型水泥回转窑热平衡参数的测定。...
2023-08-16 00:12:01浏览：13
查看 -
DB44/T 649-2009 南珠光泽的测定方法 Determination of luster for the Chinese cultured pearl
本标准规定了南珠光泽的定义、测定方法、测定规则和级别划分。<br />本标准适用于南珠光泽的测定。...
2023-08-14 09:48:01浏览：15
查看 -
ASTM D6426-2018 中间馏份燃料油过滤性测定方法 Standard Test Method for Determining Filterability of Middle Distillate Fuel Oils
<div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.1</span> This test method covers a procedure for determining the filterability of distillate fuel oils within the viscosity range from 1.70 mm<sup>2</sup>/s to 6.20 mm<sup>2</sup>/s (cSt) at 40 °C.</p><div style="text-align:left;" class="NoteLevel1"> <p><span class="note cdone" style="text-transform: uppercase;">Note 1:</span> <span class="note cdone">ASTM specification fuels falling within the scope of this test method are Specification <span class="Note-link1 cdone">D396</span> Grade No. 2, Specification <span class="Note-link1 cdone">D975</span> Grade No. 2-D, and Specification <span class="Note-link1 cdone">D2880</span> Grade No. 2-GT.</span></p></div><div style="text-align:left;" class="NoteLevel1"> <p><span class="note cdone" style="text-transform: uppercase;">Note 2:</span> <span class="note cdone">The test method has been used with lower viscosity middle distillate fuels such as Specification <span class="Note-link1 cdone">D396</span> Grade No. 1, Specification <span class="Note-link1 cdone">D975</span> Grade No. 1-D, and Specification <span class="Note-link1 cdone">D2880</span> Grade No. 1-GT, but the precision has not been studied and therefore the stated precision has not been validated for these grades.</span></p></div></div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.2</span> This test method is not applicable to fuels that contain undissolved water.</p></div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.3</span> The values stated in SI units are to be regarded as standard.</p> <div class="SectionLevel3"> <p class="subsec2 cdone2"><span class="Head4 cdone">1.3.1</span> Non-SI units, specifically U.S. customary units such as temperature in degrees Fahrenheit and pressure in pounds per square inch gauge (psig), are included for inform...
2023-08-13 07:24:01浏览：12
查看 -
GB/T 39137-2020 难熔金属单晶晶向测定方法 Determination for the orientation of refractory metal single crystal
本标准规定了X射线衍射法测定立方晶系难熔金属单晶晶向与宏观样品表面法向夹角的方法。<br />本标准适用于立方晶系难熔金属单晶晶向与宏观样品表面法向夹角的测定。...
2023-08-11 15:24:01浏览：11
查看 -
DB13/T 1233-2010 化工产品酸度(酸值)和碱度测定方法 Determination of acidity(acid number) and alkalinity for chemical products
本标准规定了用滴定分析法测定酸度(酸值)和碱度的通用方法。<br />本标准适用于水溶性化工产品中酸、碱度的测定，非水溶性化工产品中可溶于水的酸、碱，在用水萃取后，也可用本法在水相中测定。还适用于用沸腾乙醇抽取试样中的酸性成分的测定。...
2023-08-09 22:36:01浏览：28
查看 -
GB/T 38608-2020 油墨中可挥发性有机化合物（VOCs）含量的测定方法 Method for determination of the volatile organic compounds (VOCs) content in the ink
本标准规定了油墨及类似产品中可挥发性有机化合物（VOCs）含量的检测方法和侧试报告。<br />本标准适用于各种油墨及类似产品。...
2023-08-07 07:12:01浏览：19
查看 -
GB/T 41980.1-2022 液压传动 系统和元件中压力波动的测定方法 第1部分：液压泵（精密法） Hydraulic fluid power-Determination method of pressure ripple levels generated in systems and components- Part 1 :Hydraulic pumps(precise method)
本文件确立了一个容积式液压泵的源流量脉动和源阻抗的测试程序。<br />本文件适用于稳态条件下，泵激频率在50Hz~400Hz的范围内的所有类型和尺寸规格的容积式泵。<br />本文件以计算高阻抗压力波动作为示例。测试程序的方法和理论基础解释在附录A中给出。测试程序称为双压力／双系统方法。评级如下：<br />a）超过10个单独的泵激频率谐波的源流量脉动（标准诺顿模型中）幅值（m<sup>3</sup>/s）和相位（<sup>。</sup>）；<br />b）超过10个单独的泵激频率谐波的源流量脉动（修正模型中）幅值（m<sup>3</sup>/s)、相位（<sup>。</sup>）和时域波形；<br />c）超过10个单独的泵激频率谐波的源阻抗幅值（N·s/m<sup>3</sup>）和相位（<sup>。</sup>)；<br />d）超过10个单独的泵激频率谐波的高阻抗压力波动（MPa)，压力波动谐波f<sub>1</sub>~f<sub>10</sub>的均方根平均值。...
2023-08-05 05:12:01浏览：17
查看 -
GB/T 42368-2023 高温高压条件下可燃气体（蒸气）爆炸极限测定方法 正式版
本文件描述了在给定初始温度和初始压力条件下可燃气体(蒸气)与空气形成可燃混合气的爆炸极限的测定方法。
本文件适用于初始温度200 ℃以下初始压力1.0 MPa(绝对压力)以下且最大爆炸压力不大于15.0 MPa(绝对压力)条件下可燃气体(蒸气)爆炸极限的测定。
本文件不适用于化学不稳定性气体或各组分相互间会发生反应的混合气体爆炸极限测定。...2023-08-02 10:36:01浏览：51
查看 -
GB/T 1572-2018 煤的结渣性测定方法 Determination of clinkering property of coal
本标准规定了测定煤结渣性的方法提要、试剂和材料、仪器设备、试样制备、测定步骤、结果表述、方法精密度和试验报告。<br />本标准适用于褐煤、烟煤、无烟煤和焦炭。...
2023-08-01 01:12:01浏览：14
查看 -
ASTM D6110-2018 塑料切口试样耐却贝冲击性测定方法 Standard Test Method for Determining the Charpy Impact Resistance of Notched Specimens of Plastics
1.1 This test method is used to determine the resistance of plastics to breakage by flexural shock as indicated by the energy extracted from standardized (see Note 1) pendulum-type hammers, mounted in standardized machines, in breaking standard specimens with one pendulum swing. This test method requires specimens to be made with a milled notch (see Note 2). The notch produces a stress concentration which promotes a brittle, rather than a ductile, fracture. The results of this test method are reported in terms of energy absorbed per unit of specimen width (see Note 3). Note 1: The machines with pendulum-type hammers have been standardized in that they must comply with certain requirements including a fixed height of hammer fall, which results in a substantially fixed velocity of the hammer at the moment of impact. Hammers of different initial energies (produced by varying their effective weights), however, are recommended for use with specimens of different impact resistance. Moreover, manufacturers of the equipment are permitted to use different lengths and constructions of pendulums with possible differences in pendulum rigidities resulting (see Section 5). Be aware that other differences in machine design do exist. Note 2: The specimens are standardized in that they have a fixed length and fixed depth, however, the width of the specimens is permitted to vary between limits. One design of milled notch is allowed. The notch in the specimen serves to concentrate the stress, minimize plastic deformation, and direct the fracture to the part of the specimen behind the notch. Scatter in energy-to-break is thus reduced. Because of differences in the elastic and viscoelastic properties of plastics, however, response to a given notch varies among materials. Note 3: Caution must be exercised in interpreting the results of this test method. The following testing parameters have been shown to affect test results significantly: method of specimen f...
2023-07-31 05:12:01浏览：12
查看 -
HG/T 5936-2021 腐植酸碳系数测定方法
本文件规定了腐植酸碳系数的测定方法。
本文件适用于腐植酸原料和肥料中腐植酸碳系数的测定。...2023-07-29 17:24:01浏览：11
查看 -
HG/T 5937-2021 腐植酸与黄腐酸含量的快速测定方法
本文件规定了腐植酸与黄腐酸含量的快速测定方法。
本文件适用于含腐植酸和黄腐酸的原料及原料制品中总腐植酸、可溶性腐植酸、游离腐植酸和黄腐酸含量的快速测定。可广泛用于企业内部生产过程中对原料和原料制品中腐植酸和黄腐酸含量的测定。...2023-07-29 17:00:02浏览：14
查看 -
ASTM D6032/D6032M-2017 岩芯的岩石质量指标测定方法 Standard Test Method for Determining Rock Quality Designation (RQD) of Rock Core
1.1 This test method covers the determination of the rock quality designation (RQD) as a standard parameter in drill core logging of a core sample in addition to the commonly obtained core recovery value (Practice D2113); however there may be some variations between different disciplines, such as mining and civil projects. 1.2 This standard does not cover any RQD determinations made by other borehole methods (such as acoustic or optical televiewer) and which may not give the same data or results as on the actual core sample(s). 1.3 There are many drilling and lithologic variations that could affect the RQD results. This standard provides examples of many common and some unusual situations that the user of this standard needs to understand to use this standard and cannot expect it to be all inclusive for all drilling and logging scenarios. The intent is to provide a baseline of examples for the user to take ownership and watch for similar, additional or unique geological and procedural issues in their specific drilling programs. 1.4 This standard uses the original calculation methods by D.U. Deere to determine an RQD value and does not cover other calculation or analysis methods; such as Monte Carlo. 1.5 The RQD in this test method only denotes the percentage of intact and sound rock in a core interval, defined by the test program, and only of the rock mass in the direction of the drill hole axis, at a specific location. A core interval is typically a core run but can be a lithological unit or any other interval of core sample relevant to the project. 1.6 RQD was originally introduced for use with conventional drilling of N-size core with diameter of 54.7 mm (2.155 in.). However, this test method covers all types of core barrels and core sizes from BQ to PQ, which are normally acceptable for measuring determining RQD as long as proper drilling techniques are used that do not cause excess core breakage or poor recovery, o...
2023-07-23 03:24:02浏览：10
查看 -
DB13/T 1225-2010 肥料pH值测定方法 Determination of fertilizer pH value
本标准规定了用电位法测定肥料pH值的91定。<br />本标准适用于肥料pH值的测定。pH值测定范围为1~14。...
2023-07-23 01:00:02浏览：15
查看 -
GB/T 35030-2018 烟花发射高度、发射偏斜角、辐射半径测定方法 Determination methods for launching height, launching deflection angle and radiation radius of fireworks
本标准规定了烟花发射高度、发射偏斜角、辐射半径测定方法。<br />本标准适用于烟花升空类、礼花类、组合烟花类产品燃放时发射高度、发射偏斜角、辐射半径测定；喷花类燃放时喷射高度测定。...
2023-07-22 20:00:02浏览：13
查看
