1、BRITISH STANDARD BS5409-1: 1976 Incorporating Amendment No.1 Specification for Nylon tubing Part 1: Fully plasticized nylon tubing types11 and12 for use primarily in pneumatic installations UDC 621.643.33:678.675462:621.51/.54BS5409-1:1976 This British Standard, having been prepared under the direct
2、ionof the Plastics StandardsCommittee, was published under the authority ofthe Executive Board on 30 November1976 BSI 06-1999 The following BSI references relate to the work on this standard: Committee references PLC/9, PLC/9/3 Draft for comment73/53768 and draft for approval75/52446 ISBN 0 580 0906
3、8 X Cooperating organizations The Plastics Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: British Plastics Federation* Electrical Research Association
4、British Resin Manufacturers Association Engineering Equipment Users Association* Chemical Industries Association Limited* Institution of Production Engineers Department of Industry Chemicals and Ministry of Defence* Textiles Plastics and Rubber Institute Department of Industry National Physical Post
5、 Office Laboratory Royal Institute of British Architects* Department of the Environment Building Rubber and Plastics Research Association of Research Establishment Great Britain Electrical and Electronic Insulation Society of Chemical industry Association Society of Motor Manufacturers and Traders E
6、lectrical Installation Equipment Limited* Manufacturers Association The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Agrment Board Institute of Plumbing Britis
7、h Chemical and Dyestuff Traders Institution of Civil Engineers Association Limited Institution of Municipal Engineers British Compressed Air Society Institution of Public Health Engineers British Gas Corporation Institution of Water Engineers and Scientists British Rubber Manufacturers Association L
8、loyds Register of Shipping British Valve Manufacturers Association Ministry of Agriculture, Fisheries and Food Copper Tube Fittings Manufacturers National Association of Plumbing, Heating Association and Mechanical Services Contractors Department of the Environment Property National Water Council Se
9、rvices Agency Oil Companies Materials Association Electricity Supply Industry in England and Royal Society of Health Wales Society of Builders Merchants Environmental Health Officers Association Water Companies Association Greater London Council Water Research Centre Amendments issued since publicat
10、ion Amd. No. Date of issue Comments 2284 May1977 Indicated by a sideline in the marginBS5409-1:1976 BSI 06-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Material 1 4 Designation of tubing 1 5 Dimensions 1 6 Working pressures and installation
11、 radii 1 7 Physical characteristics 2 8 Special requirement for heat and light stability 3 9 Frequency of testing 3 10 Marking 3 Appendix A Method of conditioning tubing prior to test 4 Appendix B Method for the determination of moisture absorption 4 Appendix C Method for the determination of resist
12、ance to zinc chloride solution 4 Appendix D Methods of heat ageing 4 Appendix E Method for falling weight testing 5 Appendix F Method for the determination of low temperature flexibility 6 Appendix G Method for the determination of burst pressure 6 Appendix H Method of exposure to heat and ultraviol
13、et radiation 7 Figure 1 Falling weight apparatus 5 Table 1 Tubing dimensions: light duty grade 1 Table 2 Tubing dimensions: normal duty grade 1 Table 3 Recommended working pressure at various temperatures and minimum installation radius: light duty grade 2 Table 4 Recommended working pressure at var
14、ious temperatures and minimum installation radius: normal duty grade 2 Table 5 Pressure utilization factor at various temperatures 2 Table 6 Burst test pressure 3 Table 7 Type tests 3 Table 8 Batch tests 3 Table 9 Immersion times for boiling water conditioning 4 Table 10 Slot width of impact test ap
15、paratus 6 Publications referred to Inside back coverBS5409-1:1976 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 instal
16、lations in conjunction with the compression type fittings used. Part1 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
17、 the preparation of this Part attention 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 types11 and12, for use prim
18、arily in the automotive industry; Part 3: Unplasticized nylon tubing types6 and66. 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 itsel
19、f 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 incorporated. This will be indicat
20、ed in the amendment table on the inside front cover.BS5409-1:1976 BSI 06-1999 1 1 Scope This Part of BS5409 specifies requirements for fully plasticized nylon (polyamide) tubing manufactured from nylon of either type11 or type12 and of nominal outside diameter from4mm to28mm, of two grades different
21、iated 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 References The titles of the publications referred to in this standard are listed on the inside b
22、ack cover. 3 Material 3.1 Material used for the manufacture of the tubing shall be a nylon of either type11 or type12. 3.2 The only additives that shall be added are those that are necessary to facilitate the manufacture of the polymer into sound, durable tubing with such qualities of flexibility, s
23、tability 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 physical properties of the tubing as defined in this standard. 3.3 When a moulded sheet of th
24、e material is tested for tensile properties using the test specimen illustrated in Figure 301.11 of BS2782:1970 and a rate of grip separation of50mm/min, the tensile strength shall be not less than24MPa and the elongation at break not less than200%. 4 Designation of tubing 4.1 Grade. Tubing shall be
25、 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. Tubing shall be designated by its nominal outside diameter. 5 Dimensions 5.1 Outside diameter. The outsi
26、de 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 a300mm sample of tubing, shall comply with the requirements of either Table 1 or Table 2 as appropriate. Table 1 Tubing dimensions: light
27、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, shall comply with the requirements of either Table 1 or Table 2 as appropriate. 6 Working pressures and
28、 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 calculated on the basis of an induced stress of6.7MPa at20C. Table 5 gives the factors for calculating the re
29、lationship between working pressures at other temperatures and that at20C. NOTEThe safe working pressure of the tubing is calculated from the short-time burst pressure at20C divided by a factorof3. This takes into account an estimated tubing life of100000h and also allows for the ageing in service.
30、Outside diameter Wall thickness Concentricity Nominal Min. 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 10.05 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
31、 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 diameter Wall thickness Concentricity Nominal Min. Max. Min. Max. Max. mm 4 5 6 8 10 12 16 18 22 28 mm 3.93 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.
32、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 0.10BS5409-1:1976 2 BSI 06-1999 The reduction in tensile strength with increase in temperature is taken into account by multiplying the s
33、afe working pressure at20C by the values shown in Table 5 as appropriate for the nominal size and grade. The short-time burst pressure is calculated on an induced stress() of20MPa at burst, using the following formula: where Table 3 Recommended working pressure at various temperatures and minimum in
34、stallation radius: light duty grade Table 4 Recommended working pressure at various temperatures 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 specifi
35、ed in Appendix A. 7.1 Appearance. The tubing shall be free from all visible defects and, 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 than2.0%. 7.3 Resistance
36、to zinc chloride. When tested by the method specified in Appendix C, the tubing shall show no evidence of cracking on the outside surface. 7.4 Resistance to heat ageing 7.4.1 Tubing dry heat aged as specified inD.2 andD.4 shall show no evidence of cracking when tested by the falling weight test spec
37、ified in Appendix E, and subsequently shall comply with the burst pressure requirements of7.6. 7.4.2 Tubing wet heat aged as specified inD.3 andD.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
38、 requirements of7.6. 7.5 Low temperature flexibility. When tested by the method 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 Tabl
39、e 6. P is the burst pressure d max is the maximum outside diameter of tubing e min is the minimum wall thickness. As =20MPa, at safe working pressure=20/3=6.67MPa. Nominal outside diameter Recommended maximum working pressure Minimum radius inside bend at20C 40C +20C +30C +50C +80C mm 4 5 6 8 10 12
40、16 18 22 28 bar a 15 16 16 17 17 14 13 11 11 11 bar 12 13 13 14 14 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=10 5 N/m 2 =100kPa. Nominal outside diameter Recommended maximum working pressure Minimum radius inside bend at20C 4
41、0C +20C +30C +50C +80C mm 4 5 6 8 10 12 16 18 22 28 bar 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 Pd max e min () 2e min - = To obtain safe working pressure at any tempera
42、ture, multiply safe working pressure at20C (see Table 3 and Table 4) by the factor for the temperature required. Working temperature Factor C 40 to+20 +30 +40 +50 +60 +80 1.00 0.83 0.75 0.64 0.57 0.47BS5409-1:1976 BSI 06-1999 3 Table 6 Burst test pressure NOTEThese short-term burst pressures are cal
43、culated on an induced stress of20MPa at20C. 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. Compliance with this requirement shall be checked by exposing a s
44、pecimen of the tubing for300h 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 flexibility. Bending over the mandrel should produce no signs of s
45、urface 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 applied when a change is made in polymer composition or method of
46、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 carried out during manufacture to prove quality of production. Batch
47、 tests shall be carried out in accordance with the methods specified in Table 8. Tests for compliance with7.6 shall be made on atleast five samples taken from each machine over every8h production run. 10 Marking 10.1 All tubing except that of4mm and5mm nominal outside diameter shall be indelibly mar
48、ked at intervals of not greater than1m. The markings shall show the following in the order stated: a) manufacturers or suppliers identification; b) the number of this British Standard, i.e.BS5409-1; c) designation by grade and nominal outside diameter. Adhesive labels alone shall not suffice. The me
49、thod of marking shall not adversely affect the mechanical strength of the tubing. 10.2 Tubing of4mm and5mm nominal diameter shall be indelibly marked with a series of four or five dots, whichever is appropriate, the dots to be1mm in diameter and spaced10mm apart at intervals of not greater than1m. 10.3 Each reel of tubing shall have a label attached with markings a), b) and c) specified in10.1. Nominal outside diameter Minimum burst pressure Light dut
