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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) materials Licensed Copy: London South Bank University, London South
3、Bank University, Fri Dec 08 10:36:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction 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
4、 03-2000 The following BSI references relate to the work on this standard: Committee reference CII/63 Draft for Comment 98/124920 DC ISBN 0 580 33100 8 BS 7959-2:2000 Amendments issued since publication Amd. No.DateComments Committees responsible for this British Standard The preparation of this Bri
5、tish Standard was entrusted by Technical Committee CII/63,Chemicalspillcontrol,upon whichthefollowingbodieswererepresented: AEATechnology British Oils Spill Control Association British Safety Industry Federation Chemical Industries Association Environment Agency Fire Service College Personal Safety
6、Manufacturers Association Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:36:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7959-2:2000 BSI 03-2000i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Normative references1 3Terms and
7、definitions1 4Sampling and preparation of test samples1 5Determination of water repellency1 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:36:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 03-2000 BS 7959-2:2000 Foreword This British Standard has been
8、prepared by Technical Committee CII/63, Chemical spill control. BS 7959-2 gives a method for 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
9、 BS 7959-1. These materials, which are generically known as sorbents, include those which 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 application
10、s. 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. Summary of pages This document compris
11、es a front cover, an inside front cover, pages i and ii, pages 1 to 2, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:36:5
12、7 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 03-20001 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. Such materials are hydrophobic in nature (i.e. reject water), and they retai
13、n 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 categories. Type Iweb typesheet, pad or roll Type IIloose materialdiscrete part
14、icles of variable size Type IIIfilled productssocks, booms, pillows, cushions Type IVagglomeratesmasses of strands for pick-up of viscous liquids 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this British S
15、tandard. 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 used for the control of liquid spillages Part 1: Determination of sorbency. 3 Terms
16、 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 water when subjected to gentle agitation 3.2 buoyancy ability to spring readily to
17、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. Prepare and condition the material as described in BS 7959-1:2000, 4.2. 5 Determinati
18、on 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 some materials. NOTEThis method of test is a qualitative determination of suitabil
19、ity 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, emulsifying agents and other materials. 5.3.1 Ordinary laboratory apparatus. 5.3.2 Te
20、st 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 Prepare the test pieces as follows. For Type 1 cut a sample of size suitable to cov
21、er 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 as described in clause 4. Where feasible use a full-size product sample. 5.4.2 Test
22、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 the case of Type II, loose materials, spread the sample evenly to a thickness of about
23、 10 mm. Leave the sample to stand for 30 min and then agitate with a glass rod for 30 s. NOTEA 1 l glass beaker may be the most appropriate vessel for Type II evaluation. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:36:57 GMT+00:00 2006, Uncontrolled Copy,
24、 (c) BSI 2 BSI 03-2000 BS 7959-2:2000 For all types, the 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 s
25、hall be deemed to have failed the test. NOTE 2For some 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) materia
26、l description and BS material type; b) supplier/manufacturer 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. Licensed Copy: London South Bank Universi
27、ty, London South Bank University, Fri Dec 08 10:36:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:36:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7959-2:2000 BSI 389 Chiswick High Road London W4 4AL | |
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