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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 6076 : 1996 ICS 83.140
2、 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Polymeric film for use as a protective sleeving for buried iron pipes and fittings (for site and factory application) Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:24:18 GMT+00:00 2006, Uncontrolled
3、 Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1996 BSI 1996 First published June 1981 Second edition November 1996 The following BSI referen
4、ces relate to the work on this standard: Committee reference PSE/10 Draft for comment 91/82094 DC ISBN 0 580 25573 5 BS 6076 : 1996 Amendments issued since publication Amd. No.DateText affected Committees responsible for this British Standard The preparation of this British Standard was entrusted by
5、 the Sector Board for Engineering to Technical Committee PSE/10, Iron pipes and fittings, upon which the following bodies were represented: Adhesive Tape Manufacturers Association British Foundry Association Ductile Iron and Pipe Committee Institute of British Foundrymen Institution of Mechanical En
6、gineers Institution of Water and Environmental Management Pipeline Protection Association Society of British Water Industries Water Companies Association Water Research Centre Water Services Association of England and Wales Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:24:18 GMT+00:00 20
7、06, Uncontrolled Copy, (c) BSI BS 6076 : 1996 BSI 1996i Contents Page Committees responsibleInside front cover Forewordii Introductioniii Specification Section 1. General 1.1Scope1 1.2Normative references1 1.3Definitions1 1.4Appearance1 Section 2. Tubular polymeric film for site application 2.1Compo
8、sition2 2.2Additives and residuals2 2.3Reworked material2 2.4Film structure2 2.5Dimensions2 2.6Properties2 2.7Marking3 2.8Packaging, distribution and storage3 Section 3. Sheet polymeric film for factory application 3.1Composition4 3.2Additives and residuals4 3.3Reworked material4 3.4Film structure4
9、3.5Dimensions4 3.6Mechanical properties4 3.7Reel parameters5 Section 4. Factory application of film to pipe 4.1Adhesive6 4.2Application of hot melt adhesive to film6 4.3Adhesive joint type tests6 4.4Application of film to the pipe surface6 4.5Marking7 Section 5. Certification 5.1Manufacturers certif
10、icate8 Section 6. Repair of damaged sleeving before or during installation of pipeline 6.1General9 6.2Repair material9 Tables 1Layflat width of tubular polymeric film for various sizes of iron pipe2 2Required mechanical properties for the two types of site-applied sleeving3 3Required mechanical prop
11、erties for the three types of factory-applied sleeving5 Figures 1Position of film on spigot end of pipe7 2Position of film on socket end of pipe7 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:24:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 1996
12、 BS 6076 : 1996 Foreword This British Standard has been prepared by Technical Committee PSE/10 and supersedes BS 6076 : 1981 which is withdrawn. Section 2 of this standard is based on the first publication of BS 6076 : 1981 and is exclusively for tubular polymeric sleeving for site application. Sect
13、ions 3 and 4 are exclusively for factory application of sheet form polymeric film to ductile iron pipe and are based on current practices and on tests carried out by the Ductile Iron Pipe Association, the Water Research Centre and sleeving film manufacturers. Product Certification Users of this Brit
14、ish Standard are advised to consider the desirability of third party certification of product conformity with this British Standard based on testing and continuing product surveillance, which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BS EN ISO 9000
15、. Enquiries as to the availability of third party certification schemes will be forwarded by BSI to the Association of Certification Bodies. If a third-party certification scheme does not already exist, users should consider approaching an appropriate body from the list of association members. This
16、standard is not intended to limit the development of alternative materials which perform at least as well in terms of performance required by this standard. Compliance with a British Standard does not of itself confer immunity from legal obligations. Licensed Copy: sheffieldun sheffieldun, na, Wed D
17、ec 06 15:24:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 1996iii BS 6076 : 1996 Introduction This British Standard has been based on the current practices used in protecting underground iron pipes and fittings from corrosion in aggressive soils. Polymeric film in the tubular form was first used
18、 as a protection medium in America in 1951. It has proved to be an effective way of combating corrosion and is now used for this purpose throughout the world. The tubular film is sleeved over the pipes and fittings immediately prior to laying and the overlap at the joints made to provide a close fit
19、 along the pipeline. Polymeric film in the sheet form is applied to the pipe in the factory by the cigarette wrapping technique. Joints and fittings in a factory sleeved pipeline are protected in situ by suitable means. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:24:18 GMT+00:00 2006,
20、Uncontrolled Copy, (c) BSI ivblank Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:24:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Section 1BS 6076 : 1996 BSI 19961 Section 1. General 1.1 Scope This British Standard specifies the composition, structure, mechanical properties, sizes, testi
21、ng, marking and appearance requirements of both tubular polymeric film for site application and sheet polymeric film for factory application to ductile iron pipes. This British Standard also specifies requirements for the factory application of sheet sleeving and the repair of sleeving before or dur
22、ing installation of the pipeline. 1.2 Normative references This British Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on the inside back cover.
23、For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this standard only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with
24、 any amendments. 1.3 Definitions For the purposes of this British Standard, the following definitions apply. 1.3.1 layflat width Width of a flattened tube which is equal to half the circumference. 1.3.2 window Hole that may occur in individual layers of polyethylene film when producing multi-layered
25、 film. 1.3.3 machine direction Circumferential direction of the film as applied to the pipe. 1.3.4 transverse direction Longitudinal direction of the film as applied to the pipe. 1.3.5 circumferential edge Edge of the film that fits circumferentially around the pipe. 1.3.6 longitudinal edge Edge of
26、the film that fits along the barrel of the pipe. 1.3.7 cigarette wrap Covering which is applied in sheet form to a tube, the leading edge being parallel to the longitudinal edge of the tube. 1.3.8 adhesive deposition pattern Appearance or form in which the adhesive is applied to the film. NOTE. The
27、pattern may be for example a continuous band, overlapping spirals or zig-zag. 1.3.9 scrim layer Layer of reinforcing material (e.g. woven polymeric) supplied in sheet form. 1.4 Appearance The colour of the films shall be in accordance with BS 4800 : 1989, i.e. blue (18E51 to 18E53), black (00E53) or
28、 yellow (10E50 to 10E55), or red (04D43 to 04D45). NOTE.1. Shade variations inherent in the manufacturing process are permissible. NOTE.2. The following colour coding is recommended: blue for potable water pipelines, red or black for sewerage and non-potable water and yellow for gas. Licensed Copy:
29、sheffieldun sheffieldun, na, Wed Dec 06 15:24:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 BSI 1996 BS 6076 : 1996Section 2 Section 2.Tubular polymeric film for site application 2.1 Composition The film shall be manufactured from polyethylene, or from a blend of polyethylene and/or a copolymer of
30、 ethylene and higher olefins. NOTE. A well dispersed carbon black pigment, antioxidants and slip agents may be included. 2.2 Additives and residuals Antioxidants shall not exceed 0.5 % (m/m). Colouring agents shall not exceed 3.0 % (m/m). The material shall not contain any plasticizers or fillers (o
31、ther than the colouring agent). The impurities in the material, excluding permitted amounts of colouring agent or antioxidant, shall not exceed 0.1 % (m/m). The ash from the film, after ignition at 800 C shall not exceed 2.0 % (m/m). 2.3 Reworked material The film shall not contain any regenerated p
32、roducts other than clean rework material, of the appropriate colour generated by the manufacturers own production. The proportion of rework material shall not exceed 20 % (m/m) in any batch. 2.4 Film structure 2.4.1 Structure of the film The film shall be one of the following two types: a) a single
33、layer extruded as a tube and supplied in layflat form; or b) a cross laminate of two or more layers laid so that the extrusion directions of consecutive layers form an angle with each other. NOTE 1. Film is normally supplied in sheet form for later conversion into tubular form. The film shall not co
34、ntain holes, splits, splices, perforations or other through thickness discontinuities. NOTE 2. Special requirements apply to laminated films only (see 2.4.2 and 2.6.4). 2.4.2 Requirements for laminated film only The film layer shall be properly and completely bonded together with no local tendency t
35、o delamination (see 2.6.4). Windows in one of the single layers of the film shall be permitted. Their frequency shall not exceed 5 per 1000 m of running length and their dimensions shall not exceed 2500 mm2, or over 100 mm in any direction. Splices in one of the single layers shall be permitted. The
36、ir frequency shall not exceed 2 per 1000 m of running length. To avoid short roll lengths, through film splices shall be allowed at not more than 1 per 1000 m reel. Their presence shall be clearly identified. 2.5 Dimensions 2.5.1 For all types of film (see 2.4.1) the mean film thickness shall be 225
37、 mm 25 mm, when measured in accordance with BS 2782 : Part 6 : Method 631A : 1993. For film whose thickness can be measured directly, when measured in accordance with BS 2782 : Part 6 : Method 630A : 1994, the minimum thickness at any point shall be not less than 185 mm. 2.5.2 The nominal layflat wi
38、dth of the tubular film shall conform to the dimensions given in table 1. NOTE. Table 1 gives the minimum dimensions for push-in and mechanical joints. 2.5.3 The tolerance on width of the tube shall be 2.5 %. Table 1. Layflat width of tubular polymeric film for various sizes of iron pipe Pipe size (
39、DN) Layflat width of tubular polymeric film (mm) For use with pipeline incorporating mechanical flexible joints For use with pipeline incorporating push-in flexible joints 80280 100450280 150550400 200650550 250700650 300800700 350800 40011001100 45011001100 50013501350 60013501350 70017501750 80017
40、50 9002000 10002000 11002500 12002500 14003500 16003500 2.6 Properties 2.6.1 Visual The film shall be free from tears, voids, pinholes and other discontinuities. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:24:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Section 2BS 6076 : 1996 BSI 199
41、63 1) Marking BS 6076 : 1996 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is therefore solely the claimants responsibility. Such
42、 a declaration is not to be confused with third party certification of conformity, which may also be desirable. 2.6.2 Tensile strength When tested in accordance with BS 2782 : Part 3 : Method 326C : 1977, the ultimate tensile strength of the film in both the longitudinal and circumferential directio
43、ns shall be not less than the value shown in table 2. NOTE. This is equivalent to 11 MPa, assuming a film thickness of 200 mm. 2.6.3 Elongation When tested in accordance with BS 2782 : Part 3 : Method 326C : 1977, the elongation at break of the film in both the longitudinal and circumferential direc
44、tions shall be not less than the value shown in table 2. 2.6.4 Lamination peel strength When tested in accordance with BS 5350 : Part C12 : 1994 the laminated film shall have a lamination peel strength of not less than the value shown in table 2. Table 2. Required mechanical properties for the two t
45、ypes of site-applied sleeving Mechanical propertyType of filmClause Single layer film Cross laminate film Tensile strength1)(N)44442.6.2 Elongation (%)3003002.6.3 Lamination peel strength1)(N) 12.6.4 1) The values given in the table are for a 20 mm sample width. 2.7 Marking The tubular film supplied
46、 shall bear a card or label containing the following information:- a) the manufacturers name and/or trade name; b) the number of this British Standard, i.e. BS 6076 : 19961); c) the type of film, e.g. Section 2 type film; d) the layflat width and length of the film. 2.8 Packaging, distribution and s
47、torage 2.8.1 The film shall be supplied in rolls on cores of internal diameters not less than 75 mm. 2.8.2 The rolls shall be suitably supported and protected from damage during storage and distribution. NOTE. Exposure to direct sunlight of film that does not contain carbon black should be kept to t
48、he minimum practical level. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 15:24:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 BSI 1996 BS 6076 : 1996Section 3 Section 3. Sheet polymeric film for factory application 3.1 Composition The material used for making the film shall be any or a mi
49、xture of the following: polyethylene, elastomers, and polyolefins and their copolymers. 3.2 Additives and residuals Antioxidants shall not exceed 0.5 % (m/m). Colouring agents shall not exceed 3.0 % (m/m). The material shall not contain any plasticizers or fillers (other than the colouring agent). The impurities in the material, excluding permitted amounts of colouring agent or antioxidant, shall not exceed 0.1 % (m/m). The ash from the film, after ignition at 800 C shall not exceed 2.0 % (m/m). 3.3 Reworked material The film shall not contain any regenerat