1、BRITISH STANDARD BS ISO 11648-2:2001 Statistical aspects of sampling from bulk materials Part 2: Sampling of particulate materials ICS 03.120.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS ISO 11648-2:2001 This British Standard, having been prepared under the direction o
2、f the Management Systems Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 5 December 2001 BSI 5 December 2001 ISBN 0 580 38763 1 National foreword This British Standard reproduces verbatim ISO 11648-2:2001 and implements it as
3、the UK national standard. The UK participation in its preparation was entrusted to Technical Committee SS/3, Application of Statistical Methods, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Textual errors The text
4、ual error set out below was discovered when adopting the text of the international standard. It has been reported to ISO in a proposal to amend the text of the international standard. Clause 5.3.2, page 17, paragraph 2 is not correct. An effect does not have to be statistically significant before it
5、 can be accommodated. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of t
6、he BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. An
7、y further errors in this standard should be submitted to the Secretary of the Technical committee SS/3, British Standards House, 389 Chiswick High Road, W4 4AL who will submit them formally to ISO. aid enquirers to understand the text; present to the responsible international/European committee any
8、enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, ISO title page, pages ii to v, a blank p
9、age, pages 1 to 102, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsReference number ISO 11648-2:2001(E) INTERNATIONAL STANDARD ISO 11648-2 First edition 2
10、001-10-15 Statistical aspects of sampling from bulk materials Part 2: Sampling of particulate materials Aspects statistiques de lchantillonnage des matriaux en vrac Partie 2: chantillonnage des matriaux particulairesISO 11648-2:2001(E) DPF dlcsiremia ihTs PDF file mya ctnoain emdeddeb tyfepcaes. In
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15、-HC aveneG 20 leT. + 41 22 947 10 11 xaF + 14 22 947 90 74 E-mail cirypothgiso.ch eWb www.iso.ch ii ISO 11648-2:2001(E) iii Contents Page Foreword.iv Introduction.v 1 Scope 1 2 Normative references 2 3 Terms, definitions and symbols.2 4 Applications of bulk material sampling.12 5 Principles of sampl
16、ing 13 6 Establishing a sampling scheme .23 7 Mass of increment and minimization of bias 29 8 Number of increments.32 9 Masses of gross samples and sub-lot samples .34 10 Mass-basis sampling.40 11 Time-basis sampling .42 12 Stratified random sampling within fixed mass or time intervals44 13 Mechanic
17、al sampling from moving streams.44 14 Manual sampling from moving streams50 15 Stopped-belt sampling 51 16 Sampling from stationary situations .52 17 Principles of sample preparation.59 18 Precision of sample preparation67 19 Bias in sample preparation.67 20 Preparation of samples for the determinat
18、ion of moisture .69 21 Preparation of samples for chemical analysis .71 22 Preparation of samples for physical testing.72 23 Precision and bias of measurement 72 24 Packing and marking of samples.73 Annex A (informative) Examples of variance calculations .74 Annex B (informative) Mechanical sampling
19、 implements.79 Annex C (informative) Manual sampling implements form moving streams84 Annex D (informative) Sampling implements for stationary situations.86 Annex E (informative) Sample preparation schemes 89 Annex F (informative) Particle-size reduction equipment.91 Annex G (informative) Examples o
20、f mechanical mixers .94 Annex H (informative) Mechanical sample dividers 96 Annex I (informative) Implements for manual sample division 99 Annex J (informative) Examples of riffles.101 Bibliography102ISO 11648-2:2001(E) iv Foreword ISO (the International Organization for Standardization) is a worldw
21、ide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on th
22、at committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in
23、accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attent
24、ion is drawn to the possibility that some of the elements of this part of ISO 11648 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 11648-2 was prepared by Technical Committee ISO/TC 69, Applications of
25、statistical methods, Subcommittee SC 3, Application of statistical methods in standardization. ISO 11648 consists of the following parts, under the general title Statistical aspects of sampling from bulk materials: Part 1: General principles Part 2: Sampling of particulate materials It is the intent
26、ion of ISO/TC 69/SC 3 to develop additional parts to ISO 11648 to cover the sampling of liquids and gases, if the need exists. Annexes A to J of this part of ISO 11648 are for information only.ISO 11648-2:2001(E) v Introduction This part of ISO 11648 gives the basic methods for sampling bulk particu
27、late materials in bulk (e.g. ores, mineral concentrates, coal, industrial chemicals in powder and granular form, and agricultural products such as grain) from moving streams and stationary situations. Part 1 of ISO 11648 gives a broad outline of the statistical aspects of sampling from bulk materials.
