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1、BRITISH STANDARD BS 5409-1: 1976 Incorporating Amendment No. 1 Specification for Nylon tubing Part 1: Fully plasticized nylon tubing types 11 and 12 for use primarily in pneumatic installations UDC 621.643.33:678.675 462:621.51/.54 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:30:39 GMT+
2、00:00 2006, Uncontrolled Copy, (c) BSI BS 5409-1:1976 This British Standard, having been prepared under the direction of the Plastics Standards Committee, was published under the authority of the Executive Board on 30 November 1976 BSI 06-1999 The following BSI references relate to the work on this
3、standard: Committee references PLC/9, PLC/9/3 Draft for comment 73/53768 and draft for approval 75/52446 ISBN 0 580 09068 X Cooperating organizations The Plastics Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Governmen
4、t departments and scientific and industrial organizations: British Plastics Federation*Electrical Research Association British Resin Manufacturers AssociationEngineering Equipment Users Association* Chemical Industries Association Limited*Institution of Production Engineers Department of Industry Ch
5、emicals andMinistry of Defence* TextilesPlastics and Rubber Institute Department of Industry National PhysicalPost Office LaboratoryRoyal Institute of British Architects* Department of the Environment Building Rubber and Plastics Research Association of Research EstablishmentGreat Britain Electrical
6、 and Electronic InsulationSociety of Chemical industry AssociationSociety of Motor Manufacturers and Traders Electrical Installation EquipmentLimited* Manufacturers Association The organizations marked with an asterisk in the above list, together with the following, were directly represented on the
7、committee entrusted with the preparation of this British Standard: Agrment BoardInstitute of Plumbing British Chemical and Dyestuff TradersInstitution of Civil Engineers Association LimitedInstitution of Municipal Engineers British Compressed Air SocietyInstitution of Public Health Engineers British
8、 Gas CorporationInstitution of Water Engineers and Scientists British Rubber Manufacturers AssociationLloyds Register of Shipping British Valve Manufacturers AssociationMinistry of Agriculture, Fisheries and Food Copper Tube Fittings ManufacturersNational Association of Plumbing, Heating Association
9、and Mechanical Services Contractors Department of the Environment PropertyNational Water Council Services AgencyOil Companies Materials Association Electricity Supply Industry in England andRoyal Society of Health WalesSociety of Builders Merchants Environmental Health Officers AssociationWater Comp
10、anies Association Greater London CouncilWater Research Centre Amendments issued since publication Amd. No.Date of issueComments 2284May 1977Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:30:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5409-1:1976
11、BSI 06-1999i Contents Page Cooperating organizationsInside front cover Forewordii 1Scope1 2References1 3Material1 4Designation of tubing1 5Dimensions1 6Working pressures and installation radii1 7Physical characteristics2 8Special requirement for heat and light stability3 9Frequency of testing3 10Mar
12、king3 Appendix A Method of conditioning tubing prior to test4 Appendix B Method for the determination of moisture absorption4 Appendix C Method for the determination of resistance to zinc chloride solution4 Appendix D Methods of heat ageing4 Appendix E Method for falling weight testing5 Appendix F M
13、ethod for the determination of low temperature flexibility6 Appendix G Method for the determination of burst pressure6 Appendix H Method of exposure to heat and ultraviolet radiation7 Figure 1 Falling weight apparatus5 Table 1 Tubing dimensions: light duty grade1 Table 2 Tubing dimensions: normal du
14、ty grade1 Table 3 Recommended working pressure at various temperatures and minimum installation radius: light duty grade2 Table 4 Recommended working pressure at various temperatures and minimum installation radius: normal duty grade2 Table 5 Pressure utilization factor at various temperatures2 Tabl
15、e 6 Burst test pressure3 Table 7 Type tests3 Table 8 Batch tests3 Table 9 Immersion times for boiling water conditioning4 Table 10 Slot width of impact test apparatus6 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:30:39 GMT+00:00 2006, Uncontroll
16、ed Copy, (c) BSI BS 5409-1:1976 ii BSI 06-1999 Foreword This British Standard is published under the authority of the Plastics Standards Committee. It has been prepared to provide a national standard for plasticized nylon tubing for use primarily in pneumatic installations in conjunction with the co
17、mpression type fittings used. Part 1 is not intended to cover tubing for use in contact with beverages or foodstuffs, nor is it suitable for domestic central heating systems. Tubing containing reinforcing agents or fillers is not within the scope of this standard. In the preparation of this Part att
18、ention has been paid to standards prepared by Comit Europen des Transmissions Olo-Hydrauliques et Pneumatiques (CETOP). It is intended to prepare further Parts of this standard as follows: Part 2: Plasticized and unplasticized nylon tubing types 11 and 12, for use primarily in the automotive industr
19、y; Part 3: Unplasticized nylon tubing types 6 and 66. 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
20、obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 8, 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 the amendment table
21、 on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:30:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5409-1:1976 BSI 06-19991 1 Scope This Part of BS 5409 specifies requirements for fully plasticized nylon (polyamide) tubing manufactured from nylon of either type
22、 11 or type 12 and of nominal outside diameter from 4 mm to 28 mm, of two grades differentiated by the tubing wall thickness, and for use either in pneumatic installations or in fluid transfer, but excluding both use with beverages or foodstuffs and use in domestic central heating systems. 2 Referen
23、ces The titles of the publications referred to in this standard are listed on the inside back cover. 3 Material 3.1 Material used for the manufacture of the tubing shall be a nylon of either type 11 or type 12. 3.2 The only additives that shall be added are those that are necessary to facilitate the
24、 manufacture of the polymer into sound, durable tubing with such qualities of flexibility, stability towards heat and light, and uniformity of colour as are required. None of these additives, either alone or in combination, shall be used in quantities that are sufficient to impair the chemical and p
25、hysical properties of the tubing as defined in this standard. 3.3 When a moulded sheet of the material is tested for tensile properties using the test specimen illustrated in Figure 301.11 of BS 2782:1970 and a rate of grip separation of 50 mm/min, the tensile strength shall be not less than 24 MPa
26、and the elongation at break not less than 200 %. 4 Designation of tubing 4.1 Grade. Tubing shall be designated light duty grade if its wall thickness complies with the requirements of Table 1 and normal duty grade if its wall thickness complies with the requirements of Table 2. 4.2 Dimensions. Tubin
27、g shall be designated by its nominal outside diameter. 5 Dimensions 5.1 Outside diameter. The outside diameter shall comply with the requirements of either Table 1 or Table 2 as appropriate. 5.2 Wall thickness. The wall thickness, when measured at any point on a 300 mm sample of tubing, shall comply
28、 with the requirements of either Table 1 or Table 2 as appropriate. Table 1 Tubing dimensions: light duty grade Table 2 Tubing dimensions: normal duty grade 5.3 Concentricity. The concentricity, defined as the maximum difference between any two wall thicknesses measured at the same cross section, sh
29、all comply with the requirements of either Table 1 or Table 2 as appropriate. 6 Working pressures and installation radii Safe working pressures over a range of temperatures are given in Table 3 and Table 4 together with information on the minimum safe installation radii. These pressures are calculat
30、ed on the basis of an induced stress of 6.7 MPa at 20 C. Table 5 gives the factors for calculating the relationship between working pressures at other temperatures and that at 20 C. NOTEThe safe working pressure of the tubing is calculated from the short-time burst pressure at 20 C divided by a fact
31、or of 3. This takes into account an estimated tubing life of 100 000 h and also allows for the ageing in service. Outside diameterWall thicknessConcentricity NominalMin.Max.Min.Max.Max. mm 4 5 6 8 10 12 16 18 22 28 mm 3.95 4.95 5.90 7.90 9.90 11.90 15.90 17.85 21.85 27.80 mm 4.05 5.05 6.05 8.05 10.0
32、5 12.05 16.05 18.05 22.05 28.05 mm 0.42 0.55 0.67 0.92 1.17 1.17 1.42 1.42 1.72 2.17 mm 0.58 0.71 0.83 1.08 1.33 1.33 1.58 1.58 1.88 2.33 mm 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.10 0.10 0.10 Outside diameterWall thicknessConcentricity NominalMin.Max.Min.Max.Max. mm 4 5 6 8 10 12 16 18 22 28 mm 3.93
33、4.93 5.90 7.90 9.90 11.90 15.90 17.85 21.85 27.80 mm 4.05 5.05 6.05 8.05 10.05 12.05 16.05 18.05 22.05 28.05 mm 0.67 0.77 0.92 1.17 1.42 1.67 1.92 1.92 2.42 2.92 mm 0.83 0.93 1.08 1.33 1.58 1.83 2.08 2.08 2.58 3.08 mm 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.10 0.10 0.10 Licensed Copy: sheffieldun sheff
34、ieldun, na, Mon Dec 04 13:30:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5409-1:1976 2 BSI 06-1999 The reduction in tensile strength with increase in temperature is taken into account by multiplying the safe working pressure at 20 C by the values shown in Table 5 as appropriate for the nominal
35、size and grade. The short-time burst pressure is calculated on an induced stress () of 20 MPa at burst, using the following formula: where Table 3 Recommended working pressure at various temperatures and minimum installation radius: light duty grade Table 4 Recommended working pressure at various te
36、mperatures and minimum installation radius: normal duty grade Table 5 Pressure utilization factor at various temperatures 7 Physical characteristics NOTEThe method of conditioning tubing prior to testing is specified in Appendix A. 7.1 Appearance. The tubing shall be free from all visible defects an
37、d, in the case of coloured tubing, it shall be evenly coloured throughout. 7.2 Moisture absorption. When tested by the method specified in Appendix B, the gain in mass shall be not greater than 2.0 %. 7.3 Resistance to zinc chloride. When tested by the method specified in Appendix C, the tubing shal
38、l show no evidence of cracking on the outside surface. 7.4 Resistance to heat ageing 7.4.1 Tubing dry heat aged as specified in D.2 and D.4 shall show no evidence of cracking when tested by the falling weight test specified in Appendix E, and subsequently shall comply with the burst pressure require
39、ments of 7.6. 7.4.2 Tubing wet heat aged as specified in D.3 and D.4 shall show no evidence of cracking when tested by the falling weight test specified in Appendix E, and subsequently shall comply with the burst pressure requirements of 7.6. 7.5 Low temperature flexibility. When tested by the metho
40、d specified in Appendix F, tubing shall show no evidence of fracture. 7.6 Burst pressure. When tubing is tested by the method specified in Appendix G, the burst pressure shall be not less than the appropriate value in Table 6. Pis the burst pressure dmaxis the maximum outside diameter of tubing emin
41、is the minimum wall thickness. As = 20 MPa, at safe working pressure = 20/3 = 6.67 MPa. Nominal outside diameter Recommended maximum working pressure Minimum radius inside bend at 20 C 40 C + 20 C + 30 C + 50 C + 80 C mm 4 5 6 8 10 12 16 18 22 28 bara 15 16 16 17 17 14 13 11 11 11 bar 12 13 13 14 14
42、 11 10 9 9 9 bar 9.5 10 10 11 11 9 8 7 7 7 bar 7 7.5 7.5 8 8 6.5 6 5 5 5 mm 30 35 45 55 75 85 115 135 155 225 a 1 bar = 105 N/m2= 100 kPa. Nominal outside diameter Recommended maximum working pressure Minimum radius inside bend at 20 C 40 C + 20 C + 30 C + 50 C + 80 C mm 4 5 6 8 10 12 16 18 22 28 ba
43、r 26 24 24 22 22 21 18 16 16 15 bar 22 20 20 18 18 17 15 13 13 12 bar 17 15 15 14 14 13 11 10 10 9.5 bar 12 11 11 10 10 10 8.5 7.5 7.5 7 mm 25 30 35 45 60 70 90 115 125 160 P dmaxemin() 2emin - -= To obtain safe working pressure at any temperature, multiply safe working pressure at 20 C (see Table 3
44、 and Table 4) by the factor for the temperature required. Working temperatureFactor C 40 to + 20 + 30 + 40 + 50 + 60 + 80 1.00 0.83 0.75 0.64 0.57 0.47 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 13:30:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5409-1:1976 BSI 06-19993 Table 6 Burst
45、 test pressure NOTEThese short-term burst pressures are calculated on an induced stress of 20 MPa at 20 C. 8 Special requirement for heat and light stability If specified by the customer, the tubing shall be stabilized against heat and light degradation by the incorporation of suitable additives. Co
46、mpliance with this requirement shall be checked by exposing a specimen of the tubing for 300 h to ultraviolet radiation, using the method specified in Appendix H. After removal of the specimen of tubing from the radiation it shall be tested by the method described in Appendix F for low temperature f
47、lexibility. Bending over the mandrel should produce no signs of surface or stress cracks in the specimen. 9 Frequency of testing 9.1 Type testing. Type tests are intended to prove the suitability and performance of a new composition or a new compounding or processing technique. Such tests shall be a
48、pplied when a change is made in polymer composition or method of manufacture or in any case not less frequently than once every six months. Type tests shall be carried out in accordance with the methods specified in Table 7. Table 7 Type tests Table 8 Batch tests 9.2 Batch tests. Batch tests are car
49、ried out during manufacture to prove quality of production. Batch tests shall be carried out in accordance with the methods specified in Table 8. Tests for compliance with 7.6 shall be made on at least five samples taken from each machine over every 8 h production run. 10 Marking 10.1 All tubing except that of 4 mm and 5 mm nominal outside diameter shall be indelibly marked at intervals of not greater than 1 m. The markings shall show the following
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