1、Irrigation techniques - Quick coupling pipes for movable irrigation supply - Technical characteristics and testing The European Standard EN 12734.2000 has the status of a British Standard ICs 23.040.60; B6.060.35 BS EN 12734:2000 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITED BY COPYRIGHT LAW
2、BS EN 127342000 direction of the Engineering Amd.No. Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 August 2000 National foreword Date Comments This British Standard is the official Enghsh language version of EN 12734.2000. The UK participa
3、tion in its preparation was entrusted to Technical Committee AGEBO, Irngation and drainage equipment, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK
4、 interests informed; - monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publicatio
5、ns referred to in this document may be found in the BSI Standards Catalogue under the section entitled ?International Standards Correspondence Index?, or by using the ?Find? facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include ail the necessary provision
6、s of a contract. Users of British Standxs are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 19 and a
7、 back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. O BSI 082000 I I ISBN O 580 36294 9 STD-BSI BS EN 1273V-ENGL 2000 Lb24bbS 08b5217 344 m EUROPEAN STANDARD NORME EUROPENNE EUROPiUSCHE NORM EN 12734 May 2000 ICs 23.040.60; 65.060.35 English
8、version Irrigation techniques - Quick coupling pipes for movable irrigation supply - Technical characteristics and testing Techniques dirrigation - Tubes raccords rapides pour amenes mobiles en irrigation - Caractristiques techniques et essai Bewsserungsverfahren - Schnellkupplungsrohre fr ortsbeweg
9、liche Bewsserungseinrichtungen - Technische Eigenschaften und Prfung This European Standard was approved by CEN on 28 April 2000. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standar
10、d without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three oficial versions (English, French, German). A version in any other langu
11、age made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, I
12、celand, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMAL1 SATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 8-1050 Brussels O 2000 CEN All rights of ex
13、ploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12734:2000 E Page 2 EN 12734:2000 Contents Page Foreword 3 Scope 4 4 Normative references Terms and Definitions 4 Technical characteristics . . 4 Marking 9 Construction and operating tests . . 9 Carrying
14、 out of test . 11 Annex A informative) Application for test of quick coupling pipes according to EN . Form 1 . 15 Annex B (informative) Results of test of quick coupling pipes carried out in accordance to EN . Form 2 . 17 Bibliography I9 O BSI 08-2000 _ STD-BSI BS EN 12734-ENGL 2000 Lb24bb9 OAb5219
15、117 Page 3 EN 12734:2000 :oreword This European Standard has been prepared by Technical Committee CENTTC 334, Irrigation techniques, the Secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by en
16、dorsement, at the latest by November 2000 and conflicting national standards shall be withdrawn at the latest by November 2000. According to the CENCENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Be
17、lgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Within its programme of work the CENTTC 334, Irrigation Techniques, charged CENTTC 334MIG 6, Water supply -Buried a
18、nd surface pipes, to elaborate the following standard: EN 12734 Irrigation techniques - Quick coupling pipes for movable irrigation supply - Technical characteristics and testing. Q BSI 08-2000 Page 4 EN 12734:2000 PE PVC I Scope extruded extruded This standard specifies the conditions of suitabilit
19、y for application of quick coupling pipes for movable irrigation supply made of steel, aluminium, PE or rigid PVC used in irrigation systems. Standards for PE or PVC are not applicable for quick coupling pipes. 2 Normative references This European Standard incorporates by dated or undated reference,
20、 provisions from other publications. These nomative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in
21、 it by amendment or revision. For undated references the last edition of the publication referred to applies. EN 10240, Internal andor external protective coatings for sfeel tubes - Specification for hot dip galvanized coatings applied in automatic plants EN 45001, General criteria for the operation
22、 of testing laboratories IS0 4065, Thermoplastic pipes - Universal wall thickness table IS0 1 1678, Agricultural irrigation equipment - Aluminium irrigation tubes 3 Terms and Definitions For the purposes of the present standard, the following term and definition apply. 3.1 Quick coupling pipe Portab
23、le pipe with coupling parts which give a safe connection with the pipe of the same without a tool. NOTE: The loosening is possible in the same easy way. 4 Technical characteristics 4.1 Material Methods for the production of tubes depending upon the materials are indicated in Table I. I Steel I welde
24、d l I Aluminium alloy 1 welded or extruded I ind in a few seconds mostly O BSI 08-2000 STD-BSI BS EN L2734-ENGI- 2000 D LbZlbLS OBb522L 875 D 70 80 89 100 108 120 133 150 159 200 216 250 0,7 0,7 0,8 0,8 0,9 0,9 1,0 1,0 1,2 1,2 1,5 1,8 Page 5 EN 12734:2000 300 1,8 1.2 Corrosional resistance and prote
25、ction against corrosion Average outside diameter ) in mm measured at PNIO=I,OMPa Min. wall thickness without zinc in mm 4.2.1 General Quick coupling pipes have to be corrosional resistant against the application 50 60 0,7 0,7 4.2.2 Pipes and couplings made of steel All parts of quick coupling pipes
26、made of steel shall conform to EN 10240. 4.2.3 Pipes and couplings made of aluminium alloy Pipes and couplings made of aluminium alloy shall meet the requirements for tubes given in IS0 11678. 4.2.4 Pipes made of PE or PVC No specific requirements (pipes made of such material are resistant against t
27、he chemical influence of soil and water). 4.3 Length 4.3.1 General It is to distinguish between nominal length (IN) and overall length (lo). 4.3.2 Nominal length he nominal length of a quick coupling pipe shall be declared by the manufacturer. It is measured afler coupling of two ilentic pipes as th
28、e distance between two similar points on both pipes. The measurement should be carried out under nominal pressure at (20 f 5) “C. Deviation of (O to 0,4) % from the declared value is allowable (see Figure 1). 4.3.3 Overall length lhe overall length of a quick coupling pipe is the total length of a p
29、ipe incl. coupling parts (see Figure I). rN nominal length lo overall length Figure 1: Nominal length and overall length of quick coupling pipes 4.4 Average outside diameter and wall thickness of tubes (measured in mm) 4.4.1 Pipes made of steel Table 2: Minimum wall thickness of pipes made of steel
30、tube depending on outside diameter ) Tolerances of diameter are not necessary because the producer himself completes the tubes with coupling parts. O BSI 08-2000 STD-BSI BS EN L273Y-ENGL 2000 II lb29bb7 08b5222 701 t Averageoutsidediameter“in 50 60 70 76 80 89 100 108 120 127 133 150 152 159 200 mm
31、measured at PN 10 = 1,0 MPa Tolerances + / - (in mm) 0,60 0,75 0,75 0,75 0,75 0,75 0,80 0,90 0,90 0,90 0,90 1,OO 1,00 1,OO 1,OO Minimumwallthickness in mm 0,90 0,90 0,90 0,90 0,90 1,15 1,lO 1,18 1,lO 1,25 1,30 1,30 1,40 1,42 1,80 Tolerances + / - (in mm) 0,08 0,lO 0,lO 0,lO 0,lO 0,lO 0,lO 0,12 0,12
32、0,12 0,12 0,14 0,14 0,14 0,15 Page 6 EN 12734:2000 Minimum wall thickness in mm 4.4.2 Pipes made of aluminium alloy 0,9 0,9 1 ,O 1 ,O 1 ,I _ _ _- _ _ “Instead of pipes specified in Table 3 also pipes of light metal in the normal inch dimension thickness can be used. Table 4: Minimum wall thickness o
33、f extruded pipes made of aluminium IAverage outside diameter) in mmmeasured at PN 10 = 1 ,O MP welding residue and flashes are allowed to protrude not more than 2 mm. The protective coating on steel pipes must have such a strong adhesion so that hits caused during transportation or general use do no
34、t allow peeling off. The adhesion of the coating should also avoid hairline cracks caused by the test pressure. O BSI 08-2000 Page 8 EN 12734:2000 4.6 Coupling Three kinds of couplings are used: - Spherical coupling with an O - ring - seal, mechanically closed - Coupling with a lip type seal, mechan
35、ically closed - Coupling with a lip type seal. Closed by water-pressure. The coupling that is closed by water pressure could be not tight at water pressures below 50 kPa. NOTE: For special application lip type couplings may be required to be untight at pressures below 50 kPa by agreement. The maximu
36、m bending angle shall be declared by the manufacturer in his documentation. The coupling shall be water-tight if filled with water under nominal pressure. If quick coupling pipes are used as suction line the coupling shall be tight for water and air. The coupling shall withstand opening and closing
37、for 2 O00 times. Examples for different kinds of connection for quick coupling pipes see in Figure 2. Figure 2: Examples for different connection kinds of quick coupling pipes 4.7 Replacement of pipes with spherical couplings The replacement of one pipe in the middle of a pipeline with 100 m length
38、shall be possible without moving the whole pipeline in longitudinal direction. 4.8 Fittings and accessories The construction of piping systems may require the use of accessories such as elbows or T-pieces. In this case they shall show the same technical characteristics as the corresponding pipes and
39、 couplings. In some cases the installation of stabilizers may be recommended. They should be specified by the manufacturer in order to match the specified use and the risks undergone. The parts pertaining to the seal are considered as integral parts of the coupling and not as accessories. 4.9 Operat
40、ing pressure The operating pressure in quick coupling pipelines shall not exceed the nominal pressure of the pipes. The selection of pipes shall be made taking into account the possible pressure shocks O BSI 08-2000 Page 9 EN 12734:2000 1 2 3 4 1 I Marking Complete quick coupling pipes with sealing
41、elements Stabilizer ) - Bend90“ 2 T-Piece 2 minimum 100 m Quick coupling pipes according to this standard may be marked with the name or the sign of the producer in connection with length, diameter and nominal pressure. 6 7 8 6 Construction and operating tests End plug with male-piece 1 with female-
42、piece 1 Optionally other accessories: Reduced cross, online hydrant, opening elbow Pipe: length = 1 m without corrosion protection and without coupling 1 each I 6.1 Sampling and test forms For tests of quick coupling pipes the forms 1 and 2 are to be used (see Annexes A and B). These forms have to b
43、e filled in double. For the test pipes, moulded parts and documents according to the following table are necessary. 9 10 11 Table 7: Parts required for testing quick coupling piping systems Sectional drawing of the coupling located on the pipe ends with main dimensions as well as details about the m
44、aterial, fabrication and corrosion protection. 2 Operating instructions I Inline gate valve (does not belong to the tested equipment) 2 I No. I Pipes - moulded parts - accessories - documents I Quantity I Threaded piece with female coupling or flange piece with female coupling 2 6.2 Test procedure T
45、he test shall be carried out according to test methods in clause 7 for the dimensions and properties listed from section 6.2.1 to 6.2.14. 6.2.1 Outside diameter (without corrosion protection). 6.2.2 Wall thickness. c.2.3 Overall length of pipe. 6.2.4 Nominal length of pipe. Q BSI 08-2000 Page IO EN
46、12734:2000 6.2.5 Bending angle in all directions. 6.2.6 Replacement of one pipe of a pipe-line. 6.2.7 Pressure loss, pipe-line laid down in a straight line. 6.2.8 Pressure loss, pipe-line laid down in a bended line. 6.2.9 Behaviour under pressure of a straight pipe-line. 6.2.9.1 Behaviour under nomi
47、nal pressure (PN) using 7.9.2. 6.2.9.2 Behaviour up to 1,5 times nominal pressure (PN) using 7.9.2. 6.2.9.3 Burst resistance to internal pressure. 6.2.10 Behaviour of a bended pipe line under nominal pressure (PN) using 7.9.1 6.2.11 Burst test using 7.9.3. 6.2.12 Bending of a pipe without water usin
48、g 7.10. 6.2.13 Bending of a pipe filled with water under no pressure. 6.2.14 Bulging test, bulging deepness caused by a falling piece. 6.2.15 Effect of the bulging test. 6.2 Test equipment 6.3.1 For reading the adjusted nominal pressure or test pressure only calibrated pressure gauges are to be used
49、. Pressure deviations shall not exceed f 5 %. For pressure measuring only fine-pressure gauges are to be used, which allow unobjectionable reading of 1 O kPa. For the test according to 6.2.9 a recording pressure gauge should be taken. 6.3.2 A calibrated flow-meter has to be used. The accuracy shall be within 2 %. 6.3.3 The bending is to be measured with a precision of 1 mm. 6.3.4 The bulging is to be measured with a precision of 0,l mm. 6.4 Test conditions 6.4.1 The tests shall be carried out by people which have the re
