1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 7959-2:2000 ICS 13.020
2、.40; 71.100.99; 75.180.99 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Materials used for the control of liquid spillages Part 2: Determination of water repellency or buoyancy for hydrophobic (oil sorbent) materialsThis British Standard, having been prepared under the direc
3、tion of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 March 2000 BSI 03-2000 The following BSI references relate to the work on this standard: Committee reference CII/63 Draft for Comment 98/124920 DC ISBN 0
4、 580 33100 8 BS 7959-2:2000 Amendments issued since publication Amd. No. Date Comments Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee CII/63, Chemical spill control, upon which the following bodies were represented: AEA
5、Technology British Oils Spill Control Association British Safety Industry Federation Chemical Industries Association Environment Agency Fire Service College Personal Safety Manufacturers AssociationBS 7959-2:2000 BSI 03-2000 i Contents Page Committees responsible Inside front cover Foreword ii 1 Sco
6、pe 1 2 Normative references 1 3 Terms and definitions 1 4 Sampling and preparation of test samples 1 5 Determination of water repellency 1ii BSI 03-2000 BS 7959-2:2000 Foreword This British Standard has been prepared by Technical Committee CII/63, Chemical spill control. BS 7959-2 gives a method for
7、 the determination of water repellency (buoyancy) for hydrophobic materials used for the control of spilled liquids. General test methods for all materials used for the control of spilled liquids are given in BS 7959-1. These materials, which are generically known as “sorbents”, include those which
8、act by adsorption, absorption and gelling. The test methods generally apply to sorbents of all types, which allows user to make reliable comparisons between materials of different types for specific applications. A British Standard does not purport to include all the necessary provisions of a contra
9、ct. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 2, an inside back cove
10、r and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 03-2000 1 BS 7959-2:2000 1 Scope This part of BS 7959-2 describes methods of sampling and determining the water repellency of materials for the control of oil spills on water. Suc
11、h materials are hydrophobic in nature (i.e. reject water), and they retain their buoyancy for sufficient time to allow use on water. A variety of materials of different composition and format is used in this application and for the purposes of this standard has been divided into the following catego
12、ries. Type I web type sheet, pad or roll Type II loose material discrete particles of variable size Type III filled products socks, booms, pillows, cushions Type IV agglomerates masses of strands for pick-up of viscous liquids 2 Normative references The following normative documents contain provisio
13、ns which, through reference in this text, constitute provisions of this British Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references the latest edition of the publication referred to applies. BS 7959-1, Materials us
14、ed for the control of liquid spillages Part 1: Determination of sorbency. 3 Terms and definitions For the purposes of this part of BS 7959 the terms and definitions given in BS 7959-1 and the following apply. 3.1 water repellency property of hydrophobic materials whereby they reject adsorption of wa
15、ter when subjected to gentle agitation 3.2 buoyancy ability to spring readily to the surface of water and/or float on the water surface, not below or at the water surface 4 Sampling and preparation of test samples Take representative samples of the materials as described in BS 7959-1:2000, 4.1. Prep
16、are and condition the material as described in BS 7959-1:2000, 4.2. 5 Determination of water repellency 5.1 Principle A small sample of material is placed on the surface of water in a test tank. Signs of “water logging” or sinking are assessed after a fixed time on the water, and after agitation for
17、 some materials. NOTE This method of test is a qualitative determination of suitability of hydrophobic sorbents for use on water. 5.2 Reagents Clean tap water, free from detergents, emulsifying agents and surfactants. 5.3 Apparatus All apparatus shall be completely free of detergents, surfactants, e
18、mulsifying agents and other materials. 5.3.1 Ordinary laboratory apparatus. 5.3.2 Test vessel, constructed of glass or clear plastic, of suitable size to allow sample to: a) float freely on the surface; b) absorb its maximum volume of water; c) sink to its full depth. 5.4 Procedure 5.4.1 Test pieces
19、 Prepare the test pieces as follows. For Type 1 cut a sample of size suitable to cover the surface of the water in the test vessel. For Type II measure out sufficient volume of loose material to cover the entire surface area of the liquid to about 10 mm thickness. For Types II and IV use the sample
20、as described in clause 4. Where feasible use a full-size product sample. 5.4.2 Test liquid Start each test with fresh water (5.2) to avoid any surface effects due to contamination of the water. 5.4.3 Determination For all types, place the sample of sorbent material on the surface of the water. In th
21、e case of Type II, loose materials, spread the sample evenly to a thickness of about 10 mm. Leave the sample to stand for 30 min and then agitate with a glass rod for 30 s. NOTE A 1 l glass beaker may be the most appropriate vessel for Type II evaluation.2 BSI 03-2000 BS 7959-2:2000 For all types, t
22、he samples shall be observed for a minimum of 8 h. During the test period, the test sample shall be examined for signs of sinking, water logging or significant loss of buoyancy. If any of these physical changes occurs within 8 hours the product shall be deemed to have failed the test. NOTE 2 For som
23、e products, failure may occur in the very early part of the test. The test may be continued for whatever time is considered necessary for product end use. 5.5 Test report The test report should include the following minimum information: a) material description and BS material type; b) supplier/manuf
24、acturer and product code; c) date of test; d) reference to this British Standard; e) observations during test; f) result of test (pass/fail) after 8 hours; g) time to failure if it fails after 8 hour test.blankBS 7959-2:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | |
25、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsib
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