煤炭机械取样的标准操作规程

详细信息   

• 标准号：ASTM D7430-2011a
• 发布日期：2011
• 英文题名：Standard Practice for Mechanical Sampling of Coal
• 英文主题词：auger sampling ; barge sampling ; coal ; coal sampling ; inspection ; mechanical sampling ; railroad car sampling ; sample division ; sample reduction ; sampling systems ; split-spoon sampling ; statistical analysis ; stock pile sampling ; truck sampling ; Coal/coke products ; Coal products ; Mechanical sampling systems ; Sampling
• 标准状态：现行
• 发布单位：US-ASTM
• 国际标准分类号：75.160.10 (Solid fuels)
• 载体形态：40P.;A4
• 中国标准分类号：D21
• 国别：美国材料与试验协会

文摘

It is intended that this practice be used to provide a sample representative of the coal from which it is collected. Because of the variability of coal and the wide variety of mechanical sampling equipment available, caution should be used in all stages of the sample collection process, the design of sampling system specifications, the equipment procurement and the acceptance testing of installed equipment.

After removal from the sampling system and further preparation (Practice lidateSubscription.cgi?D2013-HTML">D2013), the sample may be analyzed for a number of different parameters. These parameters may define the lot''s value, its ability to meet specifications, its environmental impact, as well as other properties.

1.1 This practice is divided into 4 parts. These 4 parts represent the previous standards lidateSubscription.cgi?D7256/D7256M-HTML">D7256/D7256M, lidateSubscription.cgi?D4916-HTML">D4916, lidateSubscription.cgi?D4702-HTML">D4702, and lidateSubscription.cgi?D6518-HTML">D6518. These 4 standards are the 4 that govern the mechanical sampling of coal and have been combined into one document for the ease of reference of the users of these standards.

Part A

1.2 lic">lic">Part AMechanical Collection and Within-System Preparation of a Gross Sample of Coal from Moving Streams8212;Covers procedures for the mechanical collection of a sample under Classification I-B-1 and I-B-2 (Practice lidateSubscription.cgi?D2234/D2234M-HTML">D2234/D2234M) and the within-system preparation (reduction and division) of gross samples utilizing various components of the mechanical sampling system.

1.2.1 Part A describes mechanical sampling procedures for coals lic">(1) by size and condition of preparation (for example, mechanically cleaned coal or raw coal), and lic">(2) by sampling characteristics.

1.2.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

Part B

1.3 lic">lic">Part BMechanical Auger Sampling8212;Describes procedures for the collection of an increment, partial sample, or gross sample of material using mechanical augers. Reduction and division of the material by mechanical equipment at the auger is also covered. Further manual or mechanical reduction or division of the material elsewhere shall be performed in accordance with Practice lidateSubscription.cgi?D2013-HTML">D2013.

1.3.1 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

Part C

1.4 lic">lic">Part CQuality Management of Mechanical Coal Sampling Systems8212;Is applicable to the quality management of cross-belt, falling stream, and auger sampling systems.

1.4.1 Spacing of increments pertains to the kind of interval between increments. Intervals can be defined in quantitative terms, such as units of time or mass, or in terms of position o......