1、BRITISH STANDARDBS ISO 13950:2007Incorporating corrigendum January 2008Plastics pipes and fittings Automatic recognition systems for electrofusion joints ICS 23.040.20; 23.040.45g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g5
2、4g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 13950:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2008ISBN 978 0 580 61746 1National forewordThis British Standard is the UK implem
3、entation of ISO 13950:2007, incorporating corrigendum January 2008. The UK participation in its preparation was entrusted by Technical Committee PRI/88, Plastics piping systems, to Subcommittee PRI/88/2, Plastics piping for pressure applications.A list of organizations represented on this subcommitt
4、ee can be obtained on request to its secretary.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 cannot confer immunity from legal obligations.Amendments/corrigenda issued sinc
5、e publicationDate Comments30 April 2008 Implementation of ISO corrigendum January 2008 (correcting paragraph 2 of 4.3.1)Reference numberISO 13950:2007(E)INTERNATIONAL STANDARD ISO13950First edition2007-03-15Plastics pipes and fittings Automatic recognition systems for electrofusion joints Tubes et r
6、accords en matires plastiques Procds de reconnaissance automatique dun assemblage par lectrosoudage BS ISO 13950:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Description of procedures . 3 4.1 Numerical recognition 3 4.2 Electromechanical rec
7、ognition . 5 4.3 Self-regulation. 6 Annex A (normative) Structure of bar code. 7 Annex B (normative) Structure of 32-digit bar code. 23 Annex C (normative) Magnetic cards. 36 Annex D (informative) Implanted-resistor connector . 52 Annex E (normative) Self-regulation 55 BS ISO 13950:2007iv Foreword I
8、SO (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 member body interested in a subject for which a technical c
9、ommittee 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 Electrotechnical Commission (IEC) on all matters of electr
10、otechnical 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 adopted by the technical committees are circulated to the m
11、ember 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 patent rights. ISO shall not be held responsible for identi
12、fying any or all such patent rights. ISO 13950 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels. This first edition of ISO 13950 cancels and replaces ISO/TR
13、13950:1997, of which it constitutes a technical revision. BS ISO 13950:20071Plastics pipes and fittings Automatic recognition systems for electrofusion joints 1 Scope This International Standard specifies the characteristics of automatic recognition systems (numerical recognition by means of bar cod
14、es or magnetic cards, electromechanical recognition using implanted-resistor connectors and self-regulation systems) that enable the energy supply to be delivered automatically to the thermoplastic electrofusion fittings used in pipe jointing. It is applicable to electrofusion fittings intended to b
15、e used for plastics piping systems for the conveyance of gaseous fuels, water for human consumption (including raw water prior to treatment) and for general purposes, or of other fluids. 2 Normative references The following referenced documents are indispensable for the application of this document.
16、 For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 7810:2003, Identification cards Physical characteristics ISO/IEC 7811-2:2001, Identification cards Recording technique Part 2: Magn
17、etic stripe Low coercivity ISO/IEC 7811-6:2001, Identification cards Recording technique Part 6: Magnetic stripe High coercivity 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 fitting accessory for the connection by fusion of thermoplastic p
18、ipes and/or other accessories 3.2 socket female part of a fitting in which the fusion is performed 3.3 coupler fitting constituted by two sockets 3.4 monofilar coupler fitting constituted of two sockets for which fusion is performed in a single operation 3.5 bifilar coupler fitting constituted of tw
19、o sockets for which fusion is performed separately BS ISO 13950:20072 3.6 saddle electrofusion fitting for by-passing, branching, ballooning or other operations 3.7 reduction electrofusion fitting for the assembly of two pipes and/or male terminating fittings of different dimensions 3.8 elbow electr
20、ofusion fitting with two sockets with an angle 3.9 tee electrofusion fitting with three electrofusion sockets or two sockets and one male end 3.10 plug electrofusion fitting with one socket for plugging tubes and other accessories 3.11 connector end of the cable connecting the electrofusion accessor
21、y to the fusion machine 3.12 terminal fixed part of the heating element located on the outside of the fitting to enable electrical connection to be made with the fitting 3.13 terminal shroud part of the fitting enabling the connector to be mounted externally 3.14 nominal fusion time fusion time, in
22、seconds, specified by the fitting manufacturer at the reference temperature and for the electrical parameters, such as nominal resistance, voltage and current, specified by the manufacturer 3.15 real fusion time fusion time, in seconds, used in reality, taking account, if necessary, of the ambient t
23、emperature and/or the real electrical parameters 3.16 fusion voltage voltage, in RMS AC volts, applied to the fitting during the fusion cycle 3.17 fusion current current, in amperes, flowing in the fitting and its supply circuit during the fusion cycle 3.18 nominal fusion energy energy, in kilojoule
24、s, specified by the fitting manufacturer at the reference temperature and for the electrical parameters whose values fall within the tolerance ranges specified by the manufacturer 3.19 real fusion energy energy, in kilojoules, consumed by the fitting at a given ambient temperature and for electrical
25、 parameters whose values fall within the tolerance ranges specified by the manufacturer BS ISO 13950:200733.20 Resistance of the heating element 3.20.1 nominal resistance ohmic resistance of the heating element at 23 C used in the basic design calculations for the electrofusion fitting, as specified
26、 by the manufacturer 3.20.2 identification resistance ohmic resistance of the heating element at 20 C measured on any electrofusion fitting 3.20.3 measured resistance ohmic resistance at the ambient temperature measured on any electrofusion fitting 3.21 resistivity reciprocal of the conductivity of
27、the heating element, in ohm metres 3.22 temperature coefficient of the heating element gradient of the change in resistance versus temperature, in reciprocal degrees kelvin 3.23 digit whole number from zero to nine 3.24 character whole number from zero to nine or a letter or a sign 4 Description of
28、procedures 4.1 Numerical recognition 4.1.1 Principle Methods for numerical recognition are based on systems such as bar codes and magnetic cards. Fusion parameters are recorded in code form on the data medium. At the manufacturers initiative or in response to user request, other information for fitt
29、ing identification, identification of test data, fusion cycle optimization, additional safety measures, etc. can also be encoded For a heating cycle, the system reads, processes and memorizes the information recorded on the data medium. Successive messages are displayed, or signal tones emitted, to
30、request the operator to follow a procedure, defined by the fitting manufacturer, specific to the fitting in question and including its recognition. 4.1.2 Field of application and limits Numerically controlled fusion machines capable of reading fusion parameters can be used for all electrofusion and
31、electro-heating assembly techniques. The limits of this type of fusion control unit shall be detailed by the manufacturer in terms of the maximum energy to be delivered, the fusion programmes incorporated, BS ISO 13950:20074 the fusion adaptations incorporated, and the limits of the programmable par
32、ameters. 4.1.3 Bar codes 4.1.3.1 General The system for entering data using bar codes offers a number of different user possibilities, both for the fitting supplier and the manufacturer of the fusion machine: the fitting manufacturer records on the bar code the data he considers will be needed to en
33、sure correct assembly, the amount of data depending on factors such as particular requirements or new technical developments; the control unit manufacturer is free to develop his own software and the technical design of the unit, and can choose which data to display, which commands will be available
34、, the criteria for fusion cycle emergency stop, and the display and recording of the various faults, the memorization method for fusion data, etc. 4.1.3.2 Format of bar codes The format of bar codes shall one or the other of the following. a) The 24 digit “2-in-5” interleaved type. The ratio between
35、 the width of the thicker bar and the thinner bar shall be 2,5. The bar code content is summarized in Annex A. b) The 32 digit “2-in-5” interleaved type, including traceability coding as summarized in Annex B. The ratio between the width of the thicker bar and the thinner bar shall be 2,5. 4.1.3.3 B
36、ar code structure The bar code structure shall have a predetermined overall length of either 24 digits or 32 digits. One of these digits is composed by a control character (checksum). A complementary character set can be added if further data is required. The content of each digit shall be in accord
37、ance with Annex A or Annex B, as applicable. 4.1.4 Magnetic cards 4.1.4.1 General The system of data insertion by means of magnetic cards offers different possibilities for the fitting supplier, as well as for the user and control unit manufacturer. The fitting manufacturer records on the card the n
38、umber of items of data necessary for the completion of an optimal fusion joint. In order to establish the fusion programme, he can choose between the functions described in Annex C, and adapt the data according to his wishes using nominal or real values. A fusion programme can contain up to 90 chara
39、cters. The control unit manufacturer is completely free to develop his own software as well as the technological concept of the unit. He can choose, among others, the data appearing on the display, the different commands, the emergency stop of the fusion cycle, as well as the display and recording o
40、f the different faults, the fusion data storage mode, etc., unless these are already prescribed in other standards. With respect to the quality assurance of every fusion, a record containing all or part of the fusion process data can be stored either on the magnetic card or in the control box memory
41、. When the fusion has been completed successfully and recorded on the magnetic card, the same magnetic card shall not be used again to carry out another fusion. BS ISO 13950:200754.1.4.2 Description of technique Use of a magnetic card for the transmission of data to a fusion control unit requires th
42、e following information: the card format; the magnetic tracks to be used; the recording technique; the data storage mode; the variables and the units in which they are expressed. 4.1.4.3 Physical characteristics of magnetic card The magnetic card (ID-1) specified in this International Standard is in
43、 accordance with ISO/IEC 7810, ISO/IEC 7811-2 and ISO/IEC 7811-6. The magnetic card shall not contain embossed characters. The three tracks according to ISO/IEC 7811-2 and ISO/IEC 7811-6 may be used to store data (fusion programme: tracks 1 and 2 only, and a fusion record: tracks 1, 2 and 3) on the
44、card. 4.1.4.4 Description of encoding ISO/IEC 7811-2 specifies the characteristics of the magnetic stripe. The structure of the information on tracks 1, 2 and 3 is given in Annex C. 4.1.4.5 Data storage For the data storage, the basic rules given in Annex C shall be followed. 4.2 Electromechanical r
45、ecognition 4.2.1 Principle The primary function of the electromechanical recognition method consists of converting the measured value of an identifying resistance into a fusion time. Other functions may be carried out, such as fitting identification by the implanted resistance method. 4.2.2 Field of
46、 application and limits Electromechanical recognition may be used when fittings are provided with the correct terminal housing and terminal pin configurations. 4.2.3 “Implanted resistor” connector 4.2.3.1 General A resistor is implanted in one of the terminal pins of an electrofusion fitting. The va
47、lue of this resistor is read by the control unit and the fusion time is determined automatically by the control box from stored data. 4.2.3.2 Description of system (see Annex D) A resistor is placed in the fitting terminal as shown in Figure D.1. This terminal is moulded into the fitting together wi
48、th a second plain terminal in the other fitting connector (see Figure D.2). BS ISO 13950:20076 The preferred values of the dimensions versus the voltage of the system are given in Table D.1, by way of example. The preferred values of the implanted resistor together with the equivalent fusion times a
49、re given in Table D.2, by way of example. The connector (see Figure D.3) from the control box to the fitting is used to recognize the resistor value and to supply power to fittings. The fusion control unit determines the fusion time from the recognized resistance value using stored data. 4.3 Self-regulation 4.3.1 Principle This fusion control process operates using the physico-chemical state of the material at the fitting/pipe interface. It automatically incorporates variations in fit, assembly temperature, supply voltages and the elec
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