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1、BRITISH STANDARD BS 7413:1991 Incorporating Amendment Nos. 1 and 2 Specification for White PVC-U extruded hollow profiles with heat welded corner joints for plastics windows: materials type A Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:20 GMT+00:00 200
2、6, Uncontrolled Copy, (c) BSI BS 7413:1991 This British Standard, having been prepared under the direction of the Elements and Components (of Diverse Materials) for Buildings Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 29 March 1991 B
3、SI 01-1999 The following BSI references relate to the work on this standard: Committee reference ECB/46 Draft for comment 88/12085 DC ISBN 0 580 19372 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Elements and components (of Diverse
4、Materials) for Buildings Standards Policy Committee (ECB/-) to Technical Committee ECB/46, upon which the following bodies were represented: Association of Builders Hardware Manufacturers Association of Metropolitan Authorities British Board of Agrment British Plastics Federation Consumer Policy Com
5、mittee of BSI Department of Health Department of the Environment (Building Research Establishment) Department of the Environment (Property Services Agency) Flat Glass Manufacturers Association Glass and Glazing Federation Institution of Fire Engineers London Housing Consortium Plastics Window Associ
6、ation Ltd. Royal Institute of British Architects Amendments issued since publication Amd. No.DateComments 7269July 1992 8185May 1994Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:20 GMT+00:00 2006, Uncontrolled Copy,
7、(c) BSI BS 7413:1991 BSI 01-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definitions1 3Raw materials1 4Profile properties2 5Profile marking2 Appendix A Impact strength test4 Appendix B Tensile-impact strength test5 Appendix C Retention of impact strength after art
8、ificial ageing6 Appendix D Reference method for measuring face surface flatness and parallelism7 Appendix E Heat reversion test7 Appendix F Heat ageing test7 Appendix G Impact resistance at low temperature test8 Appendix H Colour fastness test8 Appendix J Weld factor test8 Appendix K Corner strength
9、 test9 Figure 1 Specimen dimensions for the impact strength test4 Figure 2 Specimen dimensions for the tensile-impact strength test5 Figure 3 Retention of impact strength after artificial ageing test: sample dimension6 Figure 4 Apparatus for corner strength test9 Figure 5 Points of maximum tensile b
10、ending stress11 Table 1 Physical properties of PVC-U type A material1 Table 2 Tolerances on dimensions3 Publication(s) referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7413:1991 i
11、i BSI 01-1999 Foreword This British Standard has been prepared under the direction of the Elements and Components (of Diverse Materials) for Buildings Standards Policy Committee. BS 7412 should be read in conjunction with this standard. White PVC-U extruded hollow profiles with heat welded corner jo
12、ints for plastics windows: materials type B, are specified in BS 7414. 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 imm
13、unity from legal obligations. 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 indicated in t
14、he amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7413:1991 BSI 01-19991 1 Scope This British Standard specifies requirements for the raw materials and properties
15、of the finished profile after manufacture for white PVC-U extruded hollow profiles with heat welded corner joints for plastics windows manufactured from materials type A. Methods of test are given in Appendix A to Appendix K. NOTE 1Plastics windows made from PVC-U extruded hollow profiles are specif
16、ied in BS 7412 and requirements for white PVC-U hollow profiles for plastics windows manufactured from materials type B are specified in BS 7414. NOTE 2The titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Stan
17、dard the definitions given in BS 6100-1.3.5 and BS 6100-1.5.1 apply together with the following. 2.1 die line a continuous longitudinal mark on the external faces of a profile that originates during extrusion 2.2 face surface a surface in a profile that is exposed to view when the window is closed 2
18、.3 profile a length of extruded material of defined cross section 2.4 sink mark a depression on the surface of an extrusion 2.5 type A materials materials complying with the requirements of Table 1 3 Raw materials 3.1 Composition The profiles shall be made from type A materials consisting substantia
19、lly of unplasticized polyvinyl chloride (PVC-U). NOTE 1Only those additives and pigments may be used that are necessary for the manufacture of the compound and for its subsequent conversion into sound, durable extrusions of good surface finish and mechanical strength as assessed by the requirements
20、of Table 1 of this specification. NOTE 2Profiles may contain a percentage of regranulated or repulverized material (up to 10 %). If reworked material is added or used it shall comprise the manufacturers own clean reworked material from products complying with this standard and the resulting profile
21、shall comply with this standard. 3.2 Physical properties The PVC-U material from which the profiles are made shall comply with the requirements given in Table 1. The tests shall be carried out on samples cut from the face surfaces of extruded profile except on samples for the apparent modulus of ela
22、sticity test which shall be carried out on pressed plaques prepared from milled sheet under the conditions specified in ISO 1163-2. Table 1 Physical properties of PVC-U type A material TestTest methodMinimum value Softening pointBS 2782:Method 120B75 C Apparent modulus of elasticityBS 2782:Method 33
23、5 A (Rate of strain = 5 mm/min) 2 250 MPa Tensile yield stress at 23 CBS 2782:Method 320C (Rate of strain = 5 mm/min) 39 MPa Heat stabilityBS 2782:Method 130 Aa85 min Impact strengthBS 2782:Method 359 (see Appendix A) 12 kJ/m2 Tensile-impact strengthISO 8256 at 23 C at 0 C Method A specimen type 5 (
24、see Appendix B) 600kJ/m2 400 kJ/m2 Retention of impact strength after artificial ageing Appendix C70 % of original value a This test is not suitable for all materials but it represents the best current available knowledge. Licensed Copy: London South Bank University, London South Bank University, Fr
25、i Dec 08 14:43:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7413:1991 2 BSI 01-1999 4 Profile properties 4.1 Storage and conditioning of test samples All samples shall be stored at 20 5 C and shall not be tested sooner than 16 h after production. Samples shall be conditioned and tested in accord
26、ance with the requirements of the relevant appendix. NOTE 1For the purposes of quality control routine testing the storage time can be shorter than 16 h providing the final storage temperature of 20 5 C is obtained. NOTE 2 The 20 5 C is a storage temperature not a conditioning temperature. 4.2 Appea
27、rance and finish The colour of the profile shall be uniform when viewed by normal or corrected vision at a range of 1 m, in 45 north sky light viewing perpendicular to the surface as described in clause 14 of method A01 of BS 1006:1990. The external and internal face surfaces of the profile shall be
28、 free from foreign bodies, cracks, sink marks or die lines when similarly viewed. In an assembled window unit the total colour difference (DE*), measured to comply with BS 3900-D8, BS 3900-D9 and BS 3900-D10 between any one and any other of the lengths of profile used shall not exceed 1.0. 4.3 Manuf
29、acturing tolerances 4.3.1 The profiles shall be straight such that the longitudinal axis of the profile, as measured on the face surfaces, may deviate from the straight line by not more than 1 mm/m. The cross section of the profile shall conform in shape and dimensions to the manufacturers drawing s
30、ubject to the tolerances in 4.3.2. 4.3.2 Tolerances on dimensions, outer wall thickness, surface flatness and on rebate grooves shall be as given in Table 2. If internal webs are present they shall be controlled so that all times reinforcement and other hardware are able to be fitted freely without
31、prior web machining. 4.3.3 The mass of the profile per metre shall not be more than 5 % below the nominated value. 4.4 Heat reversion Main frame subsill and casement or sash profiles shall be tested in accordance with Appendix E. The mean maximum reversion shall be not greater than 2 %. There shall
32、also be not more than a 0.4 % difference between the individual face sides of the same sample. Glazing beads shall also be tested in accordance with Appendix E. The mean maximum reversion shall be not more than 3 % and there shall be not more than a 0.6 % difference between the face side and the opp
33、osite side of the same sample. 4.5 Heat ageing When tested in accordance with Appendix F the profile shall show no bubbles, cracks or delamination. 4.6 Impact resistance at low temperature When main frame subsill and casement or sash profiles are tested in accordance with Appendix G, no sample shall
34、 exhibit cracking through the entire wall thickness of the profile. Ten samples per main frame, casement or sash profile shall be tested (five samples being used for each face) and there shall be no failures. Five samples per subsill profile shall be tested on the upper visible surface and there sha
35、ll be no failures. 4.7 Colour fastness When tested in accordance with Appendix H the maximum colour change allowed is that rated 3-4 on the grey scale specified in method A03 of BS 1006. The maximum colour difference when assessed by instrumental measurement in accordance with BS 3900-D8, BS 3900-D9
36、 and BS 3900-D10 shall not exceed 7.0 CIELAB colour difference units (DE*). Any samples which, though they develop acceptable colour difference, show surface erosion with the development of loose pigment (chalking) shall be unacceptable. 4.8 Weld factor When tested in accordance with the method give
37、n in Appendix J, the weld factor shall be not less than 0.7. NOTEIt is acknowledged that this test has some drawbacks but it is the best test that is currently available. 4.9 Corner strength When tested in accordance with the method given in Appendix K the weld joint shall not fracture below a stres
38、s level of 20 MPa. 5 Profile marking The main frame subsill and casement or sash profiles shall be indelibly marked at approximately 1 m intervals, in a position that will not be visible when the window is closed, with this British Standard number, i.e. BS 7413:19911), and with a mark enabling the m
39、anufacturers name and date of manufacture of the extrusion to be traced without removal of the window. Subsills shall be similarly marked in a position that will be subsequently concealed by the window. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:20 GM
40、T+00:00 2006, Uncontrolled Copy, (c) BSI BS 7413:1991 BSI 01-19993 Table 2 Tolerances on dimensions 1) Marking BS 7413:1991 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
41、 the standard. The accuracy of the claim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable. a) Overall dimensions across face surfaces The dimension A between inter
42、nal and external face surfaces of the profile shall be subject to a tolerance of 0.3 mm and shall be held over the full width of the face surfaces. b) General overall dimensions All other overall profile dimensions shall be subject to a tolerance of 0.5 mm. NOTEDimension B illustrates an example of
43、a general overall dimension. c) Outer wall thickness All outer wall thicknesses shall be subject to a tolerance of 0.3 mm. d) Face surface flatness When measured in accordance with the method described in Appendix D the difference between maximum and minimum readings across the face shall not exceed
44、 0.3 mm. NOTEThree examples are shown (all dimensions are in millimeters). Example 1. Indicates a convex face surface. Example 2. Indicates a concave face surface. Example 3. Indicates convex and concave face surfaces combined. e) Extruded rebate grooves for fixings All extruded grooves shall be sub
45、ject to a tolerance of 0.3 mm. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:43:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7413:1991 4 BSI 01-1999 Appendix A Impact strength test A.1 Test specimens A minimum of ten specimens shall be cut from the face
46、 sides of profile material, with the length L of the specimens along the direction of extrusion. The specimens shall have the dimensions and notch configuration shown in Figure 1. Notches shall be machined on unnotched specimens prepared in accordance with 6.1 of BS 2782-3:Method 359:1993 with the e
47、xception of the notch dimensions which shall be in accordance with Figure 1. Notching shall be carried out on a milling machine or lathe using a single tooth cutter, a planing machine using a single tooth cutter or by broaching. NOTEIt is emphasized that the notch quality is important in order to ob
48、tain valid results. The notch precision and surface finish should be inspected prior to test. Inspection may be by the use of an optical device with a magnification of 3 50. A.2 Procedure Condition and test the specimens by the method specified in BS 2782-3:Method 359. NOTE 1The pendulum used for th
49、e test is to have an impact energy of 1.0 J as characterized in Table 1 of BS 2782-3:Method 359: 1993. Calculate the arithmetic mean, the standard deviation and the coefficient of variation of the specimens tested. NOTE 2Some, or all, test specimens of certain materials may exhibit ductile breaks. If all specimens break in the ductile manner the impact strength is satisfactory. If a proportion of specimens tested break in the ductile manner, the impact strength of the material is the value calculated from the results obtained only f