《BS-EN-1989-2000 BS-2782-11-METHOD-1112E-2000.pdf》由会员分享，可在线阅读，更多相关《BS-EN-1989-2000 BS-2782-11-METHOD-1112E-2000.pdf（12页珍藏版）》请在三一文库上搜索。
1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1989:2000 BS 2782-1
2、1: Method 1112E:2000 The European Standard EN 1989:2000 has the status of a British Standard ICS 23.040.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Thermoplastics piping systems Joints for buried non-pressure sewerage applications Test method for long-term sealing perfo
3、rmance of joints with thermoplastic elastomer (TPE) seals by estimating the sealing pressure Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Sector Committee for Material
4、s and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 July 2000 BSI 07-2000 ISBN 0 580 36079 2 BS EN 1989:2000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version
5、 of EN 1989:2000. The test method is incorporated into BS 2782-11, Methods of testing plastics Part 11: Thermoplastics pipes, fittings and valves, as Method 1112E:2000, for association with related test methods for plastics materials and plastics piping components. The UK participation in its prepar
6、ation was entrusted to Technical Committee PRI/61, Plastics piping systems and components, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests info
7、rmed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in
8、 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 the BSI Standards Electronic Catalogue. Warning This British Standard, which is identical with EN 1989:2000, does not necessarily detai
9、l all the precautions necessary to meet the requirements of the Health and Safety at Work etc. Act 1974 and subsequent legislation. Attention should be paid to any appropriate safety precautions and the method should be operated only by trained personnel. A British Standard does not purport to inclu
10、de 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 comprises a front cover, an inside front cover, the EN
11、 title page, pages 2 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 07-2000 (8523($1?67$1$5 1250(?(8523e(11( (8523b,
12、6 b) if applicable, any change to the limit(s) between the time of production of the seal and the start up of testing (see 6.1). 4? Apparatus 4.1 A device, capable of measuring the specific radial sealing force exerted by a seal onto a mandrel. The apparatus consists of a steel cylinder, the mandrel
13、, of which a segment can compress the seal in the radial direction (see 7.2.2). The surface width, C, of the segment (see Figure 1) shall have a value lying between 5 % and 10 % of the circumference of the mandrel. The segment is linked to an instrument capable of measuring the compression forces wi
14、th an accuracy to within 5 % of the measured value, and with a means of measuring displacements greater than 10 micrometres (10 m) with an accuracy of 1 m. ? A typical arrangement of the mandrel and segment is shown in Figure 1. The mandrel shall have the minimum specified outside diameter of the pi
15、pe or spigot (tolerance: ? ? ? + mm on the diameter) for which the socket is intended. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 1989:2000 BSI 07-2000 Key: FS: radial force connected to a force measuring device A: segment M:
16、mandrel S: seal C: surface width of the segment ? Figure 1 Typical arrangement of mandrel and segment 4.2 Sealing width measuring device, capable of measuring the sealing width, to an accuracy to within 0,1 mm. The sealing width comprises the width of the circular contact area formed between the sea
17、ling ring and the pipe or fitting spigot, as shown in Figure 2. This shall include the following: a)?a transparent pipe spigot having an outside diameter equal to the minimum specified outside diameter (tolerance: ? ? + mm on the diameter) of the pipe for which the socket with the sealing ring is de
18、signed, and having a length of at least the depth of the socket; b)?an optical device with a light source for viewing and measuring the sealing width. ?NOTE 1 A typical apparatus for measuring sealing width is shown in Figure 2. This shows a mirror placed in the pipe socket at an angle of (45 0,5) t
19、o the axial direction of the socket such that the image of the seal in contact with the spigot is reflected into a microscope with a graduated scale. ?NOTE 2 If the seal has multiple lips, each individual lip will produce a circular contact area. The total width of the circular contact areas shall b
20、e measured. Key: S: seal T: transparent spigot SW: sealing width ? Figure 2 Typical apparatus for measurement of the sealing width Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 1989:2000 BSI 07-2000 5? Test pieces 5.1? Sampling ?
21、 Unless otherwise specified see clause 3, note a), samples shall be taken at random. 5.2? Preparation ? At least one pair of test pieces is needed, of which one test piece shall be used for measuring the radial specific sealing force and the other test piece for measuring the sealing width. Each tes
22、t piece shall consist of at least a complete socket cut from a pipe or a fitting, together with its TPE seal. 5.3? Number ? Unless otherwise specified see clause 3, note a) one pair of test pieces shall be used. 6? Conditioning 6.1? Time limits ? Unless otherwise specified in the referring standard,
23、 the time between production of the seal and start up of the test shall be between 24 h and 90 days. 6.2? Test temperature ? Tests shall be carried out at (23 2) C in accordance with ISO 471. 7? Procedure 7.1? General ? Carry out the following procedures using the following schedule. ? Carry out the
24、 first measurements of both the radial specific sealing force (see 7.2) and the sealing width (see 7.3) between 30 min and 60 min after assembling the test pieces with the apparatus. ? To enable extrapolation, measure and record the radial specific sealing force and the sealing width at periods whic
25、h include approximately 1 h, 4 h, 24 h, 168 h, 336 h, 504 h, 600 h, 696 h, 840 h, 1008 h, 1200 h, 1400 h, 1680 h, 2000 h, 2200 h, after the first measurement. ? Where it is not possible to make a measurement at the appropriate times between 500 h and 1008 h, it is permitted to deviate by 24 h, provi
26、ding the actual measurement time is recorded and used for the regression calculations. 7.2? Procedure for determining the radial specific sealing force 7.2.1 Assemble a socket, including the TPE seal, with the mandrel (see Figure 1). Ensure that the outer surface of the segment is flush by feel with
27、 the outer surface of the mandrel. To ease assembly, dry lubricants (e.g. talc) or distilled water may be used to lubricate the seal surface. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 EN 1989:2000 BSI 07-2000 7.2.2 Measure the r
28、adial force, F, necessary to move the segment outward over a distance of not more than 0,01 % of the nominal diameter, with a minimum of 10 m. The accuracy of the displacement shall be 10 % of the displacement. Calculate the corresponding force in newtons per millimetre of the circumference of the m
29、andrel, i.e.: F/C (see Figure 1) and record the result as the radial specific sealing force, FS, in newtons per millimetre of the spigot. The segment should be moved outward over the same distance for all subsequent readings. 7.2.3 Bring the segment back into its original position such that its oute
30、r surface is again flush with the outer surface of the mandrel, as in 7.2.1. The socket and mandrel are kept in this position at (23 2) C until the next measurement, see 7.2.2. 7.3? Procedure for determining the sealing width 7.3.1 Assemble a socket, including the TPE seal, with the transparent pipe
31、 (see 4.2). To reduce the efforts during assembly, dry lubricants (e.g. talc) or distilled water may be used to lubricate the seal surface. 7.3.2 Measure the average width (see Figure 2) of the circular area formed between the seal and the transparent pipe, with an accuracy of 0,1 mm. Record the res
32、ult as the sealing width SW. ? If the apparatus described in Figure 2 is used, bring the assembled test piece into view (e.g. under a microscope). Use sufficient light to illuminate the test piece. 8? Calculation and expression of the results ? Using the values of respectively radial specific sealin
33、g force FS and sealing width SW obtained at each period in accordance with 7.1, determine the best fit straight lines on a logarithmic time scale, by using least square analysis. The correlation coefficient shall be minimum 0,990. ? Calculate the sealing pressure PS at 90 days, using the following e
34、quation: PS=10FS/SW ? where: ?PS is the sealing pressure, in bars (1 bar = 105 N/m2); ?FS is the radial specific sealing force, in newtons per millimetre circumference of the spigot; ?SWis the sealing width, in millimetres. ? The values for FS and SW shall be those derived from the regression lines
35、for 90 days. ? Similarly, to calculate the sealing pressure PS at 100 years, the values for FS and SW shall be those derived from the extrapolation of the regression lines. ? If more than one sample pair is used, an average of the extrapolated sealing pressures must be calculated. ?NOTE Extrapolatio
36、n of test results for an estimate of the long-term sealing pressure is not an unequivocal indication of the performance of the seal over the years. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 7 EN 1989:2000 BSI 07-2000 9? Continuati
37、on of the test ? When even the use of the last 10 data points does not lead to a correlation coefficient higher than 0,990 in the regression analysis, continue the test by making additional measurement at 2818 h, 3400 h, 4000 h, 8000 h, 12000 h, or until the correlation coefficient exceeds 0,990 usi
38、ng the last 10 measurements. 10? Test report ? The test report shall include the following information: a)?a reference to this standard and the referring standard; b)?the identity of the components forming the test piece (fittings or pipes, type of seal, seal ring material); c)?at each test period t
39、he radial specific sealing force, FS, in newtons per millimetre of the circumference of the pipe spigot; d)?at each test period the sealing width, Sw, in millimetres; e)?the sealing pressure at 90 days and at 100 years, in bars; f)?any factor which may have affected the results, such as any incident
40、 or any operating detail not specified in this standard; g)?the date of the test. 11? Storage ? See Annex A. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 8 EN 1989:2000 BSI 07-2000 ?Annex A (informative) Guidance on storage of seals
41、? At all stages between manufacturing and use, the seals should be stored in accordance with the recommendations given in ISO 2230. ? The following points should be noted: a)?the storage temperature should be below 25 C; b)?the seals should be protected from light, in particular strong sunlight and
42、artificial light with a high ultraviolet content; c)?the seals should be stored in a relaxed condition, free from tension, compression or other deformation; d)?the seals should be maintained in a clean condition. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:50:11 GMT+00:00 2006, Uncontr
43、olled Copy, (c) BSI Page 9 EN 1989:2000 BSI 07-2000 Bibliography ISO 2230, Vulcanized rubber - Guide to storage Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1989:2000 BS 2782-11: Method 1112E:2000 BSI 389 Chiswick High Road London W
44、4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is
45、 the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sur
46、e that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsi
47、ble, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, interna
48、tional and foreign standards publications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise re
49、quested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: 020 8996 7111. Fax: 020 8996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase p