1、BRITISH STANDARD BS 3083:1988 Incorporating Amendment Nos.1 and2 Specification for Hot-dip zinc coated and hot-dip aluminium/zinc coated corrugated steel sheets for general purposes UDC 669.14417.2:669.146:669.586.5BS3083:1987 This British Standard, having been prepared under the directionof the Iro
2、n and Steel Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffect on 29 February1988 BSI 04-1999 First published January1959 First revision July1980 Second revision February1988 The following BSI references relate to the work on this standard: Committee refer
3、ence ISM/10 Draft for comment 86/42131 DC ISBN 0 580 16250 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Iron and Steel Standards Committee (ISM/-) to Technical Committee ISM/10, upon which the following bodies were represented: Brit
4、ish Railways Board British Steel Industry Cold Rolled Sections Association Institution of Production Engineers Society of Motor Manufacturers and Traders Ltd. The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Welded Steel Tube Assoc
5、iation Coated Metals Ltd. Electricity Supply Industry in England and Wales International Tin Research Institute Lead Development Association Metal Roof Deck Association National Association of Steel Stockholders Paintmakers Association of Great Britain Ltd. Zinc Development Association Amendments is
6、sued since publication Amd. No. Date Comments 6054 May 1990 8761 November 1995 Indicated by a sideline in the marginBS3083:1988 BSI 04-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Designation 1 3 General 1 4 Information to be supplied by the purchaser 1 5 St
7、eel base 1 6 Surface protection 1 7 Oiling: aluminium/zinc coated products 1 8 Supply condition 1 9 Coating 1 10 Dimensional requirements 2 11 Nominal mass per metre run 4 12 Marking 4 Appendix A Options 5 Appendix B Method for determination of coating mass 5 Appendix C Nominal mass per metre run (a
8、nd length per mass) 5 Appendix D Overlap of corrugated sheets at sides 7 Figure 1 Profile and cover width 3 Figure 2 Method of measuring depth of corrugations 4 Figure 3 One corrugation overlap 7 Figure 4 One and a half corrugations overlap 7 Figure 5 Two corrugations overlap 7 Table 1 Minimum coati
9、ng mass 2 Table 2 Width 2 Table 3 Tolerances on length 2 Table 4 Tolerances on thickness (including coating on both sides) 2 Table 5 Nominal mass per metre run (and length per mass) for hot-dip zinc coated products 6 Table 6 Nominal mass per metre run (and length per mass) for hot-dip zinc coated pr
10、oducts 6 Publications referred to Inside back coverBS3083:1988 ii BSI 04-1999 Foreword This British Standard has been prepared under the direction of the Iron and Steel Standards Committee and is a revision of BS3083:1980,which is withdrawn. In this revision an aluminium/zinc coating (nominally55% a
11、luminium) has been added. The zinc coated products specified in earlier editions of BS3083 have however been retained and no changes have been made to dimensional requirements. It should be noted that bi-metallic corrosion may occur if aluminium/zinc coated surfaces are allowed to come in contact wi
12、th lead or copper. Run off water from copper pipes may also cause corrosion of the aluminium/zinc coated surface. 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 Bri
13、tish Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments inc
14、orporated. This will be indicated in the amendment table on theinside front cover.BS3083:1988 BSI 04-1999 1 1 Scope This British Standard specifies the requirements for materials, profiles and dimensions of hot-dip zinc coated and hot-dip aluminium/zinc coated corrugated steel sheets for general pur
15、poses. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Designation The designation shall consist of the following items in the order given: a) the number of this British Standard, i.e.BS3083; b) the number of corrugations (see Table 2); c) the c
16、oating designation (see Table 1), where “Z” indicates zinc coating, “AZ” indicates aluminium/zinc coating, and the number denotes the coating mass (e.g.350 denotes350g/m 2total including both surfaces). Example of designation: BS308310/3 Z350. 3 General Hot-dip zinc and aluminium/zinc coated corruga
17、ted steel sheets shall comply with clause5 to clause12. Where any of the options given inAppendix A are called up at the time of the enquiry and order, the corrugated steel sheets shall, instead of or in addition to the basic specification, comply with the requirements of such options. 4 Information
18、 to be supplied by the purchaser 4.1 General The following information shall be supplied by the purchaser at the time of the enquiry and order: a) the complete designation as covered by clause2; b) the required dimensions; c) the quantity required and handling requirements. 4.2 Options A number of o
19、ptions are specified in Appendix A. In the event that the purchaser does not indicate his wish to implement any of these options and specify his requirements at the time of enquiry and order, the manufacturer shall supply in accordance with the basic specification. 5 Steel base The steel base of the
20、 products shall be a grade for which it can be assumed for design purposes that the yield strength will not be less than220N/mm 2 . See also option A.1. 6 Surface protection The products shall be supplied chemically passivated. See also option A.2. NOTE 1Chemical passivation is carried out after coa
21、ting to protect the surface against humidity and to reduce the risk of formation of wet storage stain (“white rust” in the case of zinc coated products, “black rust” in the case of aluminium/zinc coated products). However, the inhibiting characteristics are limited, and if packs of sheets are receiv
22、ed wet or become wet in storage, it is important that the sheets are immediately separated. NOTE 2Chemical passivation may cause slight discoloration of the surface that is not detrimental to the general performance of the product. NOTE 3If untreated products are specified, the manufacturer is not r
23、esponsible for the formation of storage stain. 7 Oiling: aluminium/zinc coated products Aluminium/zinc coated products shall be supplied on the basis that the presence of residual oil from processing is permitted. See also option A.3. 8 Supply condition The products shall be supplied not curved. See
24、 also option A.4. 9 Coating 9.1 Coating mass The minimum value of the coating mass shall be as given in Table 1 for the single and triple spot test when tested as described in9.2 and9.3. 9.2 Test lot A test lot shall consist of50t, or fraction thereof, of the same steel grade, coating type, coating
25、mass, nominal thickness and number of corrugations. 9.3 Test method 9.3.1 Sampling. Three measurements shall be taken from one sheet in each test lot, one from the centre and one from each edge of the product at least50mm from the edge. 9.3.2 Triple spot test. The triple spot test shall be determine
26、d as the average coating mass of the measurements as specified in9.3.1. 9.3.3 Single spot test. The single spot test shall be the lowest coating mass result of any one of the measurements determined for the triple spot test. NOTESee Appendix B for details of the referee method to be used in cases of
27、 dispute.BS3083:1988 2 BSI 04-1999 Table 1 Minimum coating mass 9.3.4 Retests. If any test does not meet the specified requirements, two further sets of measurements shall be taken from the same lot for retest purposes. Both these sets of measurements shall meet the specified requirements otherwise
28、the lot shall be deemed not to comply with this standard. The manufacturer shall have the option to carry out rectification processing or sorting and resubmitting the product for inspection and testing. 9.4 Coating adherence The coating adherence shall be such that there is no flaking of the coating
29、 after corrugating the sheets. 10 Dimensional requirements 10.1 Width The widths before and after corrugating shall be as given inTable 2. 10.2 Profile and cover width Sheets shall possess the profiles and have the nominal cover widths shown in Figure 1. 10.3 Overlap of corrugated sheets at sides In
30、formation on overlap of corrugated sheets at sides is given in Appendix D. 10.4 Tolerances on length The tolerances on length shall be as given in Table 3. 10.5 Tolerances on corrugations The tolerance on the19mm depth of corrugation shall be+0,3mm as shown inFigure 5. Table 2 Width Table 3 Toleranc
31、es on length 10.6 Tolerances on thickness The tolerances on thickness shall be as given in Table 4. Table 4 Tolerances on thickness (including coating on both sides) See also optionA.5. Coating designation Minimum coating mass (including both surfaces) Triple spot test Single spot test g/m 2 g/m 2 A
32、Z 185 185 155 Z 350 350 300 Z 450 450 385 Z 600 600 510 NOTE 1A zinc coating mass of100g/m 2 , including both surfaces, corresponds to a coating thickness of approximately74m on each surface. This relationship should be used for guidance only. NOTE 2An aluminium/zinc coating mass of100g/m 2 , includ
33、ing both surfaces, corresponds to a coating thickness of13.5 4m on each surface. This relationship should be used for guidance only. NOTE 3The mass of coating is not always evenly divided between the two surfaces of the sheet or from edge to edge. However, it can normally be expected that not less t
34、han40% of the specified minimum single spot test limit will be found on either surface. Description Width mm Sheets before corrugating a 8/3 corrugations 743 10/3 corrugations 908 10“/3 corrugations 946 12/3 corrugations 1070 12“/3 corrugations 1113 Sheets after corrugating (distance between the cro
35、wns of the outside corrugations) 8/3 corrugations 610 5 10/3 corrugations 762 5 10“/3 corrugations 800 6 12/3 corrugations 914 6 12“/3 corrugations 952 6 a Not always applicable to sheets for curving. Ordered length Tolerances mm # 3000 3000 Specified coating thickness a Tolerances b Over Up to and
36、including mm mm mm 0.6 0.06 0.6 0.8 0.07 0.8 1.0 0.08 1.0 1.2 0.09 1.2 1.6 0.11 1.6 2.0 0.13 a Thickness should be measured at any point on the material not less than40mm from one edge. b For coatings Z450 and Z600, thickness tolerance shall be increased by0.02 mm.0 + 8 mm0 + 0.30 %BS3083:1988 BSI 0
37、4-1999 3 Figure 1 Profile and cover widthBS3083:1988 4 BSI 04-1999 11 Nominal mass per metre run The nominal mass per metre run for zinc coated and aluminium/zinc coated products are given in Appendix C for guidance only. 12 Marking The material shall be marked with the number of this British Standa
38、rd, i.e.BS3083, 1)and the coating designation (see Table 1). Figure 2 Method of measuring depth of corrugations 1) Marking BS3083 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 requiremen
39、ts of this 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.BS3083:1988 BSI 04-1999 5 Appendix A Options (See4.2.) A.1 Steel ba
40、se The purchaser shall specify a structural grade specified in BS EN10147 or BSEN10215 as appropriate (see clause5). A.2 Surface protection The products shall be supplied untreated (seeclause6). A.3 Oiling: aluminium/zinc coated products Aluminium/zinc coated products shall be supplied oiled (see cl
41、ause7). A.4 Supply condition The products shall be supplied curved to the radius of curvature specified by the purchaser (seeclause8). NOTEGrades S 550 GD+Z (from BS EN10147) andS550GD+AZ (from BS EN10215) are unsuitable for curving. A.5 Tolerances on thickness If thickness is specified as a minimum
42、 with tolerances all plus, or if thickness is specified as a maximum with tolerances all minus, the permitted variation shall be double the tolerance values. The tolerances applicable shall be those for the mean of the range specified or implied. Appendix B Method for determination of coating mass B
43、.1 Principle Using a sample with a surface area of5000mm 2 , the loss of mass in grams when the coating is dissolved, multiplied by200, will represent the zinc mass in grams per square metre of product, including both sides. B.2 Reagents Hydrochloric acid (HCl 20 =1,19 g/cm 3 ) Hexamethylenetetramin
44、e B.3 Preparation of the solution Dilute the hydrochloric acid with deionized or distilled water in the ratio one part pure HCl to one part water (50% dilution). Add hexamethylenetetramine, stirring, in the ratio of3,5g per litre of dilute hydrochloric acid solution. This prepared solution is equall
45、y suitable for a zinc coating or zinc-iron alloy coating and permits the execution of numerous successive dissolutions under satisfactory conditions of attack of the coating, both from the point of view of speed and accuracy. B.4 Apparatus B.4.1 Balance capable of weighing samples to an accuracy of0
46、,01g. For the test, use a take-off device. B.5 Procedure The sample shall be at least5000mm 2in area. The following operations are applied to each sample. If necessary, degrease the sample with an organic solvent which will not attack the zinc, then dry the sample. Weigh the sample to an accuracy of
47、0,01g. Place the sample in the hydrochloric acid solution with hexamethylenetetramine inhibitor at ambient temperature (20C to25C). Leave the sample immersed in the solution until the release of hydrogen ceases or only a few bubbles are released. After the attack, wash and brush the sample under run
48、ning water, dry it with a cloth and then by heating to around100C, and cool or dry by blowing with warm air. Weigh the sample again to an accuracyof0,01%. Determine the difference between the mass of the coated sample and that of the sample without its coating. This difference, calculated in grams,
49、represents the mass m of the coating. Appendix C Nominal mass per metre run (and length per mass) Table 5 andTable 6 can be used to determine the nominal mass for any particular length of sheet, or the length for any particular mass of sheet(s). These tables are given for guidance purposes only.BS3083:1988 6 BSI 04-1999 Table 5 Nominal mass per metre run (and length per mass) for hot-dip zinc coated products Table 6 Nominal mass per metre run (and length per mass) for hot-dip aluminium/zinc
