BS-4726-1986 ISO-842-1984.pdf
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1、BRITISH STANDARD CONFIRMED AUGUST 1991 BS 4726:1986 ISO 842:1984 Methods for Sampling raw materials for paints and varnishes ISO title: Raw materials for paints and varnishes Sampling UDC 667.62:620.113 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:03:05 GMT+00:00 2006, Uncontrolled Copy
2、, (c) BSI BS 4726:1986 This British Standard, having been prepared under the direction of the Pigments, Paints and Varnishes Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 January 1986 BSI 11-1999 First published April 1971 First revision Janua
3、ry 1986 The following BSI references relate to the work on this standard: Committee reference PVC/3 Draft for comment 83/51903 DC ISBN 0 580 14784 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Pigments, Paints and Varnishes Standards
4、 Committee (PVC/-) to Technical Committee PVC/3 upon which the following bodies were represented: British Resin Manufacturers Association Fosfa International Greater London Council Oil and Colour Chemists association Overseas Development Administration (Tropical Development and Research Institute) P
5、aint Research Association Paintmakers Association of Great Britain Ltd. Seed Crushers and Oil Processors Association Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:03:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4726:19
6、86 BSI 11-1999i Contents Page Committees responsibleInside front cover National forewordii 0Introduction1 1Scope and field of application1 2References1 3Definitions1 4Safety precautions1 5Cleanliness safeguards2 6Containers for samples2 7Sampling instruments3 8Collection of gross sample of oils and
7、other non-volatile liquids4 9Collection of gross sample of volatile liquids6 10Collection of gross sample of solid resins6 11Collection of gross sample of dry powders6 12Reduction of sample size6 13Labelling and transport of samples6 Figure 1 Sampling bottle7 Figure 2 Sampling tipping dipper7 Figure
8、 3 Sampling cylinder8 Figure 4 “Go devil” sampling bottle9 Figure 5 Bottom or zone sampler (sectional view)9 Figure 6 Sampling tube consisting of two concentric tubes10 Figure 7 Sampling tube with single tube10 Figure 8 Valve sampling tube11 Figure 9 Sampling scoop for liquids11 Figure 10 Sampling t
9、ube withdrawal cleaner12 Figure 11 Sampling scoops for solids12 Table Minimum number of containers to be sampled5 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:03:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4726:1986 ii BSI 11-1999 National
10、foreword This revision of BS 4726 has been prepared under the direction of the Pigments, Paints and Varnishes Standards Committee. It is identical with ISO 842:1984 “Raw materials for paints and varnishes Sampling”, published by the International Organization for Standardization (ISO). This edition
11、of the standard supersedes BS 4726:1971, which is withdrawn. The essential differences from the first edition of this standard are the inclusion of a new clause (clause 4) drawing attention to the safety precautions to be observed when sampling and the expansion of the clause (clause 13) describing
12、the sampling report and labelling to give more precise requirements. It should be noted that the procedures described in this standard are intended to be carried out by suitably trained and/or supervised personnel. The substances and procedures described may be injurious to health if inadequate prec
13、autions are taken. This standard refers to its technical suitability and does not absolve the user from statutory obligations relating to health and safety. Attention is drawn to 8.2.2 and the need to take special care when opening taps or drip cocks that may be under pressure. In particular, care i
14、s required when attempting to clear a blockage by rodding. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British
15、Standards; attention is drawn especially to the following. Wherever the words “International Standard” appear, referring to this standard they should be read as “British Standard”. The Technical Committee has reviewed the provisions of ISO 56-1, ISO 1995, ISO 3165, ISO 3171 and ISO 6206 to which ref
16、erence is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A related British Standard to ISO 56-1 is BS 3280:1960 “Hand-made shellac”. A related British Standard to ISO 1995 is BS 3195 “Methods of sampling petroleum products”. A related British St
17、andard to ISO 3165 is BS 5309 “Methods for sampling chemical properties” Part 1:1976 “Introduction and general principles”. No British Standard corresponds either to ISO 3171 or to ISO 6206. A British Standard does not purport to include all the necessary provisions of a contract. Users of British S
18、tandards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard ISO 3170:1975BS 3195 Methods for sampling petroleum products Part 1:1978 Liquid
19、hydrocarbons: manual sampling (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 12, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be in
20、dicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 09:03:05 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4726:1986 BSI 11-19991 0 Introduction Correct sampling is a difficult process and one that requires most careful attention. It is th
21、erefore essential that it should be carried out under the supervision of an experienced sampler. The procedures given below are recognized as good practice and it is strongly recommended that they be followed whenever practicable. It is recognized that it is difficult to lay down fixed rules to be f
22、ollowed in every case and particular circumstances may render some modification of the methods desirable. It should always be the aim to obtain a sample that is properly representative of the bulk of the material. In some cases the act of taking a sample exposes the sampler to personal risk or may c
23、ause the creation of hazardous conditions endangering the safety or others. ISO 3165 gives general guidance on safety in the sampling of chemical products for industrial use and is intended to assist those engaged in sampling or in directing the activities of samplers. The main differences with the
24、first edition are that a clause “Safety precautions” has been introduced, the definitions have been aligned with ISO 6206 and the labelling requirements have been made more explicit. 1 Scope and field of application This International Standard describes methods for the sampling of raw materials for
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