1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12100 : 1998 BS 278
2、2 : Part 11 : Method 1133D : 1997 The European Standard EN 12100 : 1997 has the status of a British Standard ICS 23.060.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Plastics piping systems Polyethylene (PE) valves Test method for resistance to bending between supportsThi
3、s British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 February 1998 BSI 1998 ISBN 0 580 29101 4 BS EN 12100 : 1998 Amendments issued since publication Amd. No.
4、 Date Text affected National foreword This British Standard is the English language version of EN 12100 : 1997 published by the European Committee for Standardization (CEN). This European Standard is incorporated into BS 2782 Methods of testing plastics : Part 11: Thermoplastics pipes, fittings and
5、valves, as Method 1133D, for association with related test methods for plastics materials and plastics piping components. The UK participation in its preparation was entrusted to Technical Committee PRI/61, Plastics piping systems and components, which has the responsibility to: aid enquirers to und
6、erstand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented o
7、n this committee can be obtained on request to its secretary. The responsible UK Technical Committee considers that it is necessary to clarify the combination of figure 1 and the text of sub-clause 6.1 in respect of a) the orientation of figure 1; b) whether and how compensation should be made to th
8、e force to be applied in accordance with 6.3 in any arrangement where the weight of the test piece would interact with the specified force. With the operating member now shown in figure 1, vertical and opposite the point of application of the force as required by 6.1.1 in conjunction with a referenc
9、e to the figure, together with the instruction in 6.1.4 to place the test piece on the supports S the UK Technical Committee has concluded that for consistency, figure 1 should be regarded as though it is an elevation view with the downward direction towards the top of the page. In this condition, t
10、he UK Technical Committee considers that the force should be applied at the value specified in accordance with 6.3.1 and item c) of the note to clause 3, with the effect of the weight of the test piece incidentally supplementing that of the applied force. The UK Technical Committee considers that fi
11、gure 1 should not be presumed to represent an elevation view with the force applied upwards and the test piece restrained by overhead supports, because the effect of the weight of the test piece would then oppose the applied force and undermine the rigour of the test, as well as being inconsistent w
12、ith 6.1.4. Cross-references The British Standards which implement international or European publications 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 Standard
13、s Electronic Catalogue. Warning note. This British Standard, which is identical with EN 12100 : 1997, does not necessarily detail all the precautions necessary to meet the requirements of the Health and Safety at Work etc. Act 1974. Attention should be paid to any appropriate safety precautions and
14、the test methods should be operated only by trained personnel. 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 4, an inside back cover and a back
15、 cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12
16、100 : 1997 E EUROPEAN STANDARD EN 12100 NORME EUROPE ENNE EUROPA ISCHE NORM August 1997 ICS 23.040.01 Descriptors: Fluid pipelines, plastics, plastic tubes, cocks, polyethylene, tests, flexural strength English version Plastics piping systems Polyethylene (PE) valves Test method for resistance to be
17、nding between supports Syste mes de canalisations en plastiques Robinets en polye thyle ne (PE) Me thode dessai de re sistance a la flexion entre supports Kunststoff-Rohrleitungssysteme Armaturen aus Polyethylen (PE) Pru fverfahren fu r den Widerstand gegen Biegen bei Dreipunktbelastung This Europea
18、n Standard was approved by CEN on 1997-07-05. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concernin
19、g such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own lang
20、uage 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,
21、Switzerland and United Kingdom.Page 2 EN 12100 : 1997 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 155, Plastics piping systems and ducting systems, the Secretariat of which is held by NNI. The material-dependent parameters and/or performance requirements
22、are incorporated in the system standard(s) concerned. This standard is one of a series of standards on test methods which support system standards for plastics piping systems and ducting systems. This European Standard shall be given the status of a national standard, either by publication of an ide
23、ntical text or by endorsement, at the latest by February 1998, and conflicting national standards shall be withdrawn at the latest by February 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European
24、 Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.Page 3 EN 12100 : 1997 BSI 1998 1) 1 bar = 10 5 N/m 2 1 Scope This standard specifies a test m
25、ethod for the resistance to bending of a valve installed between supports. This standard is applicable to valves with a polyethylene (PE) body for use with pipes having a nominal outside diameter from greater than 63 mm up to and including 225 mm and intended for the transport of fluids. 2 Normative
26、 references This standard incorporates by dated or undated reference, provisions from other publications. These normative 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
27、publications apply to this standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. prEN 837-1 : 1994 Pressure gauges Part 1: Bourdon tube pressure gauges Dimensions, metrology, requirements and testing EN 28233
28、 : 1991 Thermoplastic valves Torque Test method (ISO 8233 : 1988) EN 45501 : 1992 Metrological aspects of non-automatic weighing instruments ISO 5208 : 1993 Industrial valves Pressure testing of valves 3 Principle A valve body is subjected to a bending load, by applying a given constant force to the
29、 body connected to two pipe sections resting on two supports. The valve is pressurized with air. Tightness and actuation torque are respectively checked and measured before, during and after loading. The test is carried out at an ambient temperature of (23 2) C. NOTE. It is assumed that the followin
30、g test parameters are set by the standard making reference to this standard: a) the sampling procedure (see 5.1); b) the number of test pieces to be used (see 5.2); c) the bending force to be applied to the valve (see 6.3.1); d) any test conditions, e.g., test pressure, test duration, which differ f
31、rom those given in ISO 5208 : 1993 (see 6.2). 4 Apparatus 4.1 Tensile testing machine or similar apparatus, with a device capable of applying a specified force constant to within 2 %. The stationary frame of the machine shall include two supports, S, with a 5 mm radius of curvature, having parallel
32、axes and adjustable spacing (see figure 1). Depending upon the type of valve, the moving part of the machine shall make contact via a tool having a 5 mm radius or a semi-cylindrical face or a yoke, the axis of which is parallel to that of the supports. The tool and the supports shall be made of hard
33、ened steel. NOTE. The force should not be applied directly on the body of the valve, so as not to create any damage on the obturating mechanism. The apparatus shall include force and deflection measuring indicators conforming to accuracy class II in accordance with EN 45501 : 1992. 4.2 Torque measur
34、ing device, accurate to 5% (e.g. a torque wrench). 4.3 Compressed air supply, 0 mbar to 50 mbar 1) (0 MPa to 0,005 MPa), with a pressure regulator. 4.4 Pressure gauge, 0 mbar to 50 mbar (0 MPa to 0,005 MPa), conforming to accuracy class 1,6 in accordance with prEN 837-1 : 1994. 4.5 Leak detecting de
35、vice, accurate to within 0,1 cm 3 /h, (typically with a capacity of 35 cm 3 ) and graduated to enable measurement of volumes of 0,1 cm 3 (e.g. having a graduated tube with a conical base). 4.6 Airtight piping systems, equipped with the following: a) fittings for connecting to the pipe sections; b) s
36、hut-off devices enabling the valve to be connected to the compressed air supply and the leak-detecting device e.g. pressure gauge (4.4) and graduated tube (4.5). 5 Test pieces 5.1 Preparation The test piece shall comprise a complete valve, obtained by sampling in accordance with the referring standa
37、rd, assembled between two lengths of PE pipe, each having a length such that the overall length of the test piece can be supported (see 6.1.3). The valve ends shall be fitted with plugging or capping devices (4.6). 5.2 Number The number of test pieces shall be as specified in the referring standard.
38、Page 4 EN 12100 : 1997 BSI 1998 S support Figure 1. Schematic test arrangement for bending tests 6 Procedure 6.1 Arrangements 6.1.1 Carry out the following procedure (6.1.2 to 6.3.5 inclusive), by successively placing the valve operating member: vertically, and opposite the point of application of t
39、he force (see figure 1), then horizontally, and perpendicular to the direction of the force. 6.1.2 Note the ambient temperature at the start of the test. 6.1.3 Separate the machine frame supports by 10 d n (see figure 1). 6.1.4 Place the test piece on the supports, S, so that the middle of the valve
40、 body under test is equidistant from the two supports and its longitudinal axis is perpendicular to the tool axis and the operating member placed in one of the positions specified in 6.1.1. 6.1.5 Connect the valve assembly to the piping system and install the leak-detecting device downstream from th
41、e assembly. 6.2 Initial characteristics Check and record the leaktightness when the valve is half-open (shell test) and when it is closed (obturator tightness test) by testing in accordance with ISO 5208 : 1993 and any associated test conditions specified in the referring standard. Measure and recor
42、d the actuation torque in accordance with EN 28233 : 1991. 6.3 Characteristics with the force applied 6.3.1 Apply to the valve, the force specified in the referring standard at a speed of 25 mm/min 10 % (see 4.1). 6.3.2 Maintain the force, F, on the valve for 10 h, during which time: a) check and re
43、cord in accordance with ISO 5208 : 1993 the tightness when the valve is open (internal) or half open (external); b) measure and record the actuation torque in accordance with EN 28233 : 1991; c) if and when an internal or external leak or a rupture appears, record the details, including, if possible
44、, its location(s) and report the results in accordance with clause 7. Otherwise proceed in accordance with 6.3.3 to 6.3.5. 6.3.3 Measure and record the amount of deflection present. Release the force F on the valve. 6.3.4 Examine the appearance of the valve and its connecting pipe sections and recor
45、d any deformation. 6.3.5 Repeat the procedure given in 6.1.2 to 6.3.4 inclusive, by setting the operating member in the other position specified in 6.1.1. When this has been completed, proceed in accordance with 6.4. 6.4 Final characteristics after removing the force Repeat the procedure given in 6.
46、2. 7 Test report The test report shall include the following information: a) the reference to this standard and to the referring standard; b) the complete identification of the test piece; c) the type of material; d) the nominal size of the valve; e) the number of test pieces tested; f) whether or n
47、ot any loss of internal and/or external tightness was observed and the position(s) thereof; g) the torque values, measured in accordance with 6.2, 6.3.2 and 6.4; h) any factors which may have affected the results, such as any incidents or any operating details not specified in this standard; i) the
48、date of the test.blankBSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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