1、BRITISH STANDARDBS EN ISO 1167-3:2007Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 3: Preparation of componentsICS 23.040.20; 23.040.45g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g
2、44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 1167-3:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008ISBN 978 0 580 56773 5Nationa
3、l forewordThis British Standard is the UK implementation of EN ISO 1167-3:2007. This Standard, together with BS EN ISO 1167 Parts 1, 2 23.040.20 Supersedes EN 921:1994 English VersionThermoplastics pipes, fittings and assemblies for theconveyance of fluids - Determination of the resistance to intern
4、alpressure - Part 3: Preparation of components (ISO 1167-3:2007)Tubes, raccords et assemblages en matiresthermoplastiques pour le transport des fluides -Dtermination de la rsistance la pression interne - Partie3: Prparation des composants (ISO 1167-3:2007)Rohre, Formstcke und Bauteilkombinationen au
5、sthermoplastischen Kunststoffen fr den Transport vonFlssigkeiten - Bestimmung der Widerstandsfhigkeitgegen inneren berdruck - Teil 3: Vorbereitung derRohrleitungsteile (ISO 1167-3:2007)This European Standard was approved by CEN on 2 October 2007.CEN members are bound to comply with the CEN/CENELEC I
6、nternal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN me
7、mber.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members
8、 are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switz
9、erland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN I
10、SO 1167-3:2007: EEN ISO 1167-3:2007 (E) Foreword This document (EN ISO 1167-3:2007) has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids“ in collaboration with Technical Committee CEN/TC 155 “Plastics piping systems and ducting systems”
11、 the secretariat of which is held by NEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2008, and conflicting national standards shall be withdrawn at the latest by May 2008. This document s
12、upersedes EN 921:1994. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ic
13、eland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 1167-3:2007 has been approved by CEN as a EN ISO 1167-3:2007 without any modification
14、. BS EN ISO 1167-3:2007ISO 1167-3:2007(E) iiiContents Page Foreword iv 1 Scope 1 2 Normative references 1 3 Principle1 4 Pressure-tight devices 2 4.1 General2 4.2 Components with plain sockets.2 4.3 Components with socket and gasket 5 4.4 Closing devices for valve bodies.6 5 Test pieces .8 5.1 Sampl
15、ing.8 5.2 Preparation of test pieces.9 6 Test report 9 BS EN ISO 1167-3:2007ISO 1167-3:2007(E) iv Foreword 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 ca
16、rried out through ISO technical committees. Each member 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
17、. ISO collaborates closely with the International Electrotechnical 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 Intern
18、ational Standards. Draft International Standards adopted 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
19、 elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 1167-3 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 5, General prop
20、erties of pipes, fittings and valves of plastic materials and their accessories Test methods and basic specifications. This first edition of ISO 1167-3, together with ISO 1167-2, cancels and replaces ISO 12092:2000, of which it constitutes a technical revision. ISO 1167-3 consists of the following p
21、arts, under the general title Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure: Part 1: General method Part 2: Preparation of pipe test pieces Part 3: Preparation of components Part 4: Preparation of assemblies BS EN ISO
22、1167-3:20071Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 3: Preparation of components 1 Scope This part of ISO 1167 specifies the procedure for the preparation of components, i.e. fittings and valve bodies, for t
23、he determination of their resistance to internal hydrostatic pressure according to ISO 1167-1. NOTE Polyolefin fittings for butt fusion, electrofusion and socket fusion are usually tested as an assembly and are treated in ISO 1167-4. 2 Normative references The following referenced documents are indi
24、spensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1167-1:2006, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids
25、Determination of the resistance to internal pressure Part 1: General method 3 Principle Test pieces, each comprising a single component with its appropriate sealing devices or a pipe-component assembly, are mounted with end caps or alternative means to arrive at a pressure-tight test piece assembly.
26、 Following conditioning at the specified test temperature, these test pieces are subjected to the internal hydrostatic pressure according to ISO 1167-1 for a specified period of time or until the test piece(s) fail(s). The number of test pieces, conditioning and details of the test report are as giv
27、en in ISO 1167-1. NOTE It is assumed that the following test parameters (see 5.1) are set by the standard making reference to this part of ISO 1167 and, respectively, to ISO 1167-1: a) the sampling requirements; b) the period of time between the date of production of the parts and the tests. BS EN I
28、SO 1167-3:2007ISO 1167-3:2007(E) 2 4 Pressure-tight devices 4.1 General Pressure-tight devices shall allow sealing and connection of components with the pressurizing equipment and a means of purging the air before testing. The devices shall not prevent the free parts of components, between joints, f
29、rom deforming under the action of hydrostatic pressure for the duration of the test. External reinforcing rings may be used to prevent any leakage from the joint for the required duration of the test. The external reinforcing rings and the internal seal shall be located within the area of the socket
30、. The openings in the pressure-bearing component shall be closed off such that all air is expelled and the test piece can be tested in a safe manner without any negative effect on the test results. The devices shall be in accordance with 4.2.1, 4.2.2 or 4.2.3, as applicable, or shall be of one of th
31、e types specified in 4.2.4 or 4.3. The type of pressure-tight devices shall be identified in the test report (see Clause 6). 4.2 Components with plain sockets 4.2.1 Joints using pipes and/or end caps See Figure 1. Figure 1 Example of pressure-tight test piece with hydrostatic end thrust Each of the
32、sockets of the component shall be joined to a portion of pipe and/or end cap of the series for which it is designed. The pipe ends shall be prepared in accordance with the requirements of the joint design. The free length of the pipes shall be such that the connectors can be fixed without difficulty
33、 and shall be as short as possible. IMPORTANT Care shall be taken that no additional stress is induced by the pressure-tight devices. BS EN ISO 1167-3:2007ISO 1167-3:2007(E) 34.2.2 Mechanical joint using external threads or machined grooves See Figure 2. Figure 2 Example of pressure-tight test piece
34、 with mechanical joints involving external threads or machined grooves and with hydrostatic end thrust The closing device shall be attached to the test piece by means of the engagement of its ribs with the external threads or machined grooves in the test piece. Sealing shall be ensured by cup-shaped
35、 seals inside the socket of the test piece. Machining of the grooves shall be carried out with great care, taking into account the notch sensitivity of the plastics material concerned. The number and depth of the grooves shall be selected to ensure that the stress in the component at the level of th
36、e grooves is within acceptable limits. 4.2.3 Mechanical joint using compression by means of ribbed half-segments See Figure 3. Figure 3 Example of pressure-tight test piece with mechanical compression joints and hydrostatic end thrust BS EN ISO 1167-3:2007ISO 1167-3:2007(E) 4 The grooves in the test
37、 piece are formed by pressing the ribs of the half or split shells of the closing device into the test piece. The closing device shall be held to the test piece by the ribs engaging the grooves. Sealing shall be ensured by cup-shaped seals inside the socket of the test piece. The number and height o
38、f the ribs forming the grooves in the test piece shall be selected to ensure that the stress in the component at the level of the grooves is within acceptable limits, taking into account the notch sensitivity of the plastics material concerned. NOTE The principle of the joint shown in Figure 3 avoid
39、s machining and reduces the risk of defects caused by the production of the grooves. 4.2.4 Joint using internal metal pins to prevent expulsion of connectors See Figure 4. Figure 4 Example of pressure-tight test piece with internally pinned joints and ring seals and without hydrostatic end thrust Th
40、e internally located closing pistons shall be held together by an appropriate coupling design. Sealing shall be ensured by ring seals inside the socket of the test piece, supported by external reinforcing rings. NOTE The principle illustrated in Figure 4 avoids the influence of notches caused by the
41、 gripping or retaining devices. A possible influence on the deformation of the free parts and the superimposing of additional forces due to the rigidity of the metal pins is not excluded. BS EN ISO 1167-3:2007ISO 1167-3:2007(E) 54.3 Components with socket and gasket 4.3.1 Joint with elastomer gasket
42、 using internal metal pins to prevent expulsion of connectors See Figure 5. Figure 5 Example of pressure-tight test piece with internally pinned joints and gasket seals and without hydrostatic end thrust The internally located closing pistons shall be held together by an appropriate coupling design.
43、 Sealing shall be ensured by the original seals inside the push-fit socket of the test piece, supported by external reinforcing rings. IMPORTANT Care should be taken that no additional stress is induced in the test piece by forces resulting from the piston arrangement. 4.3.2 Joint with elastomer gas
44、ket using external frame See Figure 6. Figure 6 Example of pressure-tight test piece using devices involving external frame and without hydrostatic end thrust BS EN ISO 1167-3:2007ISO 1167-3:2007(E) 6 The internally located closing pistons shall be held together by an appropriate coupling design (ex
45、ternal frame). Sealing shall be ensured by the original seals inside the push-fit socket of the test piece. All pipe ends shall be chamfered if specified by the fitting manufacturer. IMPORTANT Care should be taken that no additional stress is induced in the test piece by forces resulting from the pi
46、ston arrangement or the support. 4.3.3 Joint with elastomer gasket using external half-segments See Figure 7. Figure 7 Example of pressure-tight test piece using devices with external half-segments for jointing and with hydrostatic end thrust The closing device shall be attached to the test piece by
47、 the engagement of the shoulder of the test piece into the half-segments. Sealing shall be ensured by cup-shaped seals inside the socket of the test piece. 4.4 Closing devices for valve bodies 4.4.1 Ball valve with union connection See Figure 8. Figure 8 Example of pressure-tight device using metal
48、plugs and nuts on ball valve body BS EN ISO 1167-3:2007ISO 1167-3:2007(E) 7All openings shall be closed with plugs and O-rings. Special metal nuts may be used in place of the original plastics nuts to keep the plugs in place. The plugs should preferably not be inserted deeper into the valve body tha
49、n the original components in an assembled valve. 4.4.2 Diaphragm valves with spigots See Figure 9. Key 1 valve body 2 end connector 3 metal plate and seal Figure 9 Example of a pressure-tight device on a diaphragm valve body The diaphragm, which is usually the limiting valve component with regard to internal pressure and temperature, may be replaced by a metal plate and a sealing gasket. To close the inlet and outlet of the valve body, the same types of closing device may be used as for fittings. NOTE This arrangement does not
