1、BRITISH STANDARDBS ISO 16149:2006Agricultural irrigation equipment PVC above-ground low-pressure pipe for surface irrigation Specifications and test methodsICS 65.060.35g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40
2、g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 16149:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2006 BSI ISBN 0 580 47987 0National forewordThis British Standard reproduces verbatim ISO 16149:200
3、6 and implements it as the UK national standard.The UK participation in its preparation was entrusted to Technical Committee AGE/30, Irrigation and drainage equipment, which has the responsibility to:A list of organizations represented on this committee can be obtained on request to its secretary.Cr
4、oss-referencesThe British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Sta
5、ndards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the
6、 responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cov
7、er, the ISO title page, pages ii and iii, a blank page, pages 1 to 8, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsReference numberISO 16149:2006(E)INTERN
8、ATIONAL STANDARDISO16149First edition2006-02-15Agricultural irrigation equipment PVC above-ground low-pressure pipe for surface irrigation Specifications and test methods Matriel agricole dirrigation Tube en PVC, pos au-dessus du sol et utilis avec basse pression pour lirrigation en surface Spcifica
9、tions et mthodes dessai BS ISO 16149:2006iiiiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each mem
10、ber body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International El
11、ectrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards ado
12、pted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of pat
13、ent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 16149 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 18, Irrigation and drainage equipment and systems.BS ISO 16149:2006blank1Agricult
14、ural irrigation equipment PVC above-ground low-pressure pipe for surface irrigation Specifications and test methods 1 Scope This International Standard specifies the requirements for unplasticized polyvinyl chloride (PVC) piping, used to supply and to distribute low-pressure irrigation water through
15、 gates. lt is applicable to PVC piping with diameters of from 50 mm to 315 mm, operating at low pressures and exposed to sunlight. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. F
16、or undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General method ISO 1167-2, Thermoplastics pipes
17、, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 2: Preparation of pipe test piecesISO 2505 (all parts), Thermoplastics pipes Longitudinal reversion ISO 2507-1, Thermoplastics pipes and fittings Vicat softening temperature Part 1: Gener
18、al test method ISO 2507-2, Thermoplastics pipes and fittings Vicat softening temperature Part 2: Test conditions for unplasticized poly(vinyl chloride) (PVC-U) or chlorinated poly(vinyl chloride) (PVC-C) pipes and fittings and for high impact resistance poly (vinyl chloride) (PVC-HI) pipes ISO 9852,
19、 Unplasticized poly(vinyl chloride) (PVC-U) pipes Dichloromethane resistance at specified temperature (DCMT) Test method 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1bellreceiving shape at one end of a section of pipe that serves as a water
20、tight seal when the spigot end of an adjoining pipe section is inserted into the bell 3.2bevel smoothed annular and angular area at the end of the spigot for assisting in the coupling of the bell and spigot joint BS ISO 16149:200623.3dichloromethane resistance resistance following exposure to dichlo
21、romethane in order to give an indication of the level of gelation in the pipe and of the uniformity of that gelation 3.4gate adjustable opening in the pipe which allows water to be released 3.5impact strength measure of the brittleness or the toughness of a material 3.6longitudinal reversion change
22、in length of a pipe under higher-than-ambient temperature estimated by subjecting a test portion of pipe immersed in an inert liquid maintained at a temperature of 150 qC for a period of time determined by the wall thickness of the pipe 3.7low pressure pressure less than 100 kPa 3.8nominal pipe diam
23、eter reference value for the size of a gated pipe approximately equal to the outside diameter of the pipe, rounded to the nearest millimetre 3.9spigot inserting end of a section of pipe in the bell 3.10vicat softening temperature temperature at which a standard indenter under a force of 50 N penetra
24、tes 1 mm into the surface of a test piece cut from the wall of a pipe while the temperature is raised at a constant rate of 50 qC/h 3.11maximum working pressure highest water pressure at the inlet to a gated pipe unit recommended by the manufacturer to ensure proper operation 4 Marking Each pipe sha
25、ll bear clear and permanent markings, including the following: a) name of manufacturer or registered trademark of the manufacturer; b) classification code of the material; c) nominal diameter; d) reference to this International Standard (i.e. ISO 16149); e) production code compound, extruder, year,
26、month, day, shift. BS ISO 16149:200635 Specifications 5.1 General The product in conformance with this International Standard shall have specifications according to 5.2 to 5.4. 5.2 Dimensions 5.2.1 Outside diameter The outside diameter and corresponding tolerances shall be in accordance with Table 1
27、. Table 1 Outside diameters and corresponding tolerances Dimensions in millimetres Nominal diameter Outside diameter Tolerance dndo50 50 0,3 75 75 0,4 100 100 0,4 125 125 0,5 160 160 0,5 200 200 0,6 250 250 0,8 315 315 0,9 Other diameters may be manufactured by agreement between user and manufacture
28、r. 5.2.2 Wall thickness The minimum wall thickness shall be 2,2 mm or the result of the following equation, whichever is the greater: o2dPtSP where t is the minimum wall thickness in millimetres (mm); P is the pressure in kilopascals (kPa); S is the design stress in kilopascals (kPa); dois the outsi
29、de diameter, in millimetres (mm). The wall thickness tolerance shall be 12 % or 0,8 mm, whichever is the greater. The dimensions shall be measured according to 8.1.BS ISO 16149:200645.3 Mechanics 5.3.1 Resistance to impact Select the point of impact to allow for gate stability during the test. The g
30、ated pipe shall not break or fracture, nor shall the gate separate from the pipe, when tested according to 8.2. The test impact force shall be in accordance with Table 2. Table 2 Test impact force Nominal diameter dnImpact energy mm N m kg m 50 40 4 75 40 4 160 50 5 200 50 5 250 60 6 315 60 6 NOTE F
31、or practical purposes, 1 kg force is equal to 10 N.5.3.2 Resistance to crushing A pipe with gates shall show no breaks, splits or cracks and the gates shall not separate or have permanent distortion when crushed according to 8.3. 5.3.3 Resistance to accelerated aging (weathering) The pipes shall hav
32、e no cracks, bubbles or other defects that could affect their properties when tested under the conditions according to 8.4. 5.3.4 Watertightness of the joint and of the gate Test the assembled joints for joint tightness at a pressure of 250 kPa for a period of at least 15 min, under the conditions a
33、ccording to 8.5. No joint leakage shall occur. 5.4 Physics and chemistry 5.4.1 Resistance to dichloromethane When tested in accordance with 8.6, the tested pipe wall shall resist attack in 100 % of internal and external surfaces and in the bevelled area. 5.4.2 Longitudinal reversion When the pipe is
34、 tested in accordance with 8.7, the specimen length variation shall be 5 %. The test section shall show no bubbles, fissures or opaque areas, or other noticeable defects. 5.4.3 Vicat softening temperature When the pipe is tested in accordance with 8.8, the Vicat softening temperature shall be ! 80 q
35、C.BS ISO 16149:200656 Flow rate of gates The test flow rate through the gates at the test pressure recommended by the manufacturer shall not vary by more than 10 % of that specified by the manufacturer, measured in accordance with 8.9. NOTE This specification is applicable to pipes subjected to a pr
36、essure higher than the atmospheric pressure. 7 Sampling and acceptance number See Table 3. Table 3 Acceptance number Clause/subclause of this International StandardTestNumber of test specimensAcceptance number4 Marking 13 0 5.1 Dimensions 13 0 5.3.1 Resistance to impact 5 0 5.3.2 Resistance to crush
37、ing 5 0 5.3.3 Resistance to accelerated aging 5 0 5.3.4 Watertightness of the joint and the gate 5 0 5.4.1 Resistance to dichloromethane 5 0 5.4.2 Longitudinal reversion 5 0 5.4.3 Vicat softening temperature 5 0 6 Flow rate of gates 13 0 8 Tests 8.1 Measurement of dimensions 8.1.1 General The precis
38、ion required in each measurement is 0,025 mm. 8.1.2 Wall thickness Measure the wall thickness using a micrometer with ball anvil or other measuring instrument having the same precision. 8.1.3 Outside diameter Ensure that the outside diameter is measured with a slide calliper and the readings rounded
39、 off to the nearest 0,1 mm. Take measurements around the same cross-section, perpendicular to the pipe axis, rotating the callipers in the plane of this cross-section until the maximum and minimum values are found. BS ISO 16149:200668.2 Resistance to impact Ensure that a tup impact tester with a tup
40、-type B nose is used (radius, 50 mm). Ensure that the specimen is at least equal in length to the nominal outside diameter but not less than 150 mm. Condition the test specimens at 23 r 2 qC and 50 r 5 % relative humidity for not less than 40 h prior to test. For equipment and procedure details, see
41、 Reference 6. 8.3 Resistance to crushing Ensure that the length of the specimens includes at least one gate near the centre. Crush specimens between parallel plates in a suitable press until the distance between plates is 40 % of the outside diameter of the pipe. Ensure that the rate of loading is u
42、niform and such that the compression is completed within 2 min to 5 min. See also Reference 5. 8.4 Resistance to accelerated aging (weathering) Ensure that the specimen thickness is 20 mm. Mount the test specimens in the specimen rack with the test surfaces facing the lamp. When the test specimens d
43、o not completely fill the racks, fill the empty spaces with blank panels. Use a cycle and a temperature as follows: 4 h UV at 60 qC, and condensation at 50 qC. For equipment and procedure details, see Reference 6. 8.5 Watertightness of the joint and the gate Ensure that a cylindrical container type
44、of end cap fitted with adequate temperature and pressure equipment is used to maintain a temperature of 23 r 2 qC and the pressure according to 5.3.4. Calculate the length of the test pieces from the following equations. For a diameter less than 250 mm: o250 3L dX For diameters equal or greater than
45、 250 mm: 1000 2L X where L is the length of the piece test in millimetres (mm); dois the outside diameter in millimetres (mm); X is the length between end caps of the container in millimetres (mm). For equipment and procedure details, see ISO 1167-1 and ISO 1167-2. 8.6 Resistance to dichloromethane
46、Ensure that a container made of stainless steel is used and that it has a capacity suitable to contain both the dichloromethane and the test piece, that it is fitted with equipment suitable for suspending the test piece, and that it is provided with a device for temperature control, capable of maint
47、aining the temperature of the dichloromethane at 20 qC r 1 qC for 15 min. Remove test pieces at least 100 mm long from the pipe to be tested for resistance to dichloromethane. The equipment and procedure used shall be in accordance with ISO 9852. 8.7 Longitudinal reversion Use a container with an in
48、ert liquid maintained at a temperature of 150 qC r 2 qC for a period determined in relation to the wall thickness of the pipe, as specified in ISO 2505. The length of the test specimens shall be 200 mm r 20 mm. The equipment and procedure used shall be in accordance with ISO 2505. BS ISO 16149:20067
49、8.8 Vicat softening temperature This test consists of immersing segments of rings removed from the pipes, having a length of approximately 50 mm, a width of between 10 mm and 20 mm and a thickness of between 2,4 mm and 6 mm, in a heating bath containing a suitable liquid. Then determine the temperature at which a standard indenter penetrates 1 mm 0,01 mm into the test piece (see Figure 1). The equipment and procedure used shall be in accordance with ISO 2507
