1、BS ISO12176-2:2008ICS 23.040.20; 23.040.45; 75.200NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPlastics pipes andfittings Equipmentfor fusion jointingpolyethylene systemsPart 2: ElectrofusionThis British Standardwas published under theauthority of the Standar
2、dsPolicy and StrategyCommittee on 32008 BSI 2008ISBN 978 0 580 57287 6Amendments/corrigenda issued since publicationDate CommentsBS ISO 12176-2:2008National forewordThis British Standard is the UK implementation of ISO 12176-2:2008.The UK participation in its preparation was entrusted to TechnicalCo
3、mmittee PRI/88/2, Plastics piping for pressure applications.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compl
4、iance with a British Standard cannot confer immunityfrom legal obligations.0 SeptemberBS ISO 12176-2:2008Reference numberISO 12176-2:2008(E)ISO 2008INTERNATIONAL STANDARD ISO12176-2Second edition2008-06-15Plastics pipes and fittings Equipment for fusion jointing polyethylene systems Part 2: Electrof
5、usion Tubes et raccords en matires plastiques Appareillage pour lassemblage par soudage des systmes en polythylne Partie 2: lectrosoudage BS ISO 12176-2:2008ISO 12176-2:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be p
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8、 is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reprodu
9、ced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749
10、 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedBS ISO 12176-2:2008ISO 12176-2:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Designatio
11、n of the different types of control unit . 3 5 Construction requirements 3 5.1 General. 3 5.2 Electrical safety. 4 5.3 Cables 4 5.4 Cable connectors 4 5.5 Operator controls 5 5.6 Displays . 5 5.7 Temperature-sensing element for fusion energy compensation 5 5.8 Input data decoder 5 5.9 Digital data o
12、utput connectors 5 5.10 Transformers. 6 5.11 Duty cycle 6 6 Operating procedures 6 6.1 Supply checks. 6 6.2 Data input 7 6.3 Data validation 7 6.4 Fusion cycle 8 7 Operating requirements . 8 7.1 General. 8 7.2 Power supply. 8 7.3 Coil resistance measurement/electrical continuity check 8 7.4 Energy o
13、utput 9 7.5 Safety devices . 9 7.6 Counter 10 7.7 Endurance . 10 8 Mechanical performance 11 8.1 Shock resistance test. 11 8.2 Vibration test . 11 9 Technical file . 11 10 Marking 12 Annex A (normative) Designation scheme 13 Annex B (informative) Duty cycle . 16 Annex C (normative) Shock resistance
14、test 17 Annex D (normative) Vibration test 18 Bibliography . 19 BS ISO 12176-2:2008ISO 12176-2:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing In
15、ternational Standards is normally carried 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
16、with ISO, also take part in the work. 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 techn
17、ical committees is to prepare International 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
18、 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 identifying any or all such patent rights. ISO 12176-2 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fl
19、uids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels. This second edition cancels and replaces the first edition (ISO 12176-2:2000), which has been technically revised. ISO 12176 consists of the following parts, under the general title Plastics pipes and fittings Equi
20、pment for fusion jointing polyethylene systems: Part 1: Butt fusion Part 2: Electrofusion Part 3: Operators badge Part 4: Traceability coding BS ISO 12176-2:2008INTERNATIONAL STANDARD ISO 12176-2:2008(E) ISO 2008 All rights reserved 1Plastics pipes and fittings Equipment for fusion jointing polyethy
21、lene systems Part 2: Electrofusion 1 Scope This part of ISO 12176 specifies performance requirements for electrofusion control units for use with polyethylene (PE) electrofusion fittings for the supply of gaseous fuels or for the conveyance of water for human consumption, including raw water prior t
22、o treatment, and for the conveyance of water for general purpose or other fluids. The control units are divided into three input voltage classes: SVLV safety, very low voltage (up to 50 V), LV low voltage (50 V to 250 V) and HV higher voltage (250 V to 400 V). This part of ISO 12176 is applicable to
23、 electrofusion control units designed for use in the construction of joints between PE pipes and fittings conforming to International Standards for the supply of gaseous fuels or for the conveyance of water, where the normal operating temperature of the control unit is in the range 10 C to +40 C. If
24、 temperatures outside this range are expected, suitable operating limits are subject to agreement between manufacturer and purchaser. This part of ISO 12176 is applicable to control units with current or voltage control for fitting systems based on standard resistance wire heating technology. 2 Norm
25、ative references The following referenced documents are indispensable 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 13950, Plastics pipes and fi
26、ttings Automatic recognition systems for electrofusion joints IEC 60068-2-27, Environmental testing Part 2-27: Tests Test Ea and guidance: Shock IEC 60335-1, Household and similar electrical appliances Safety Part 1: General requirements IEC 60335-2-45, Household and similar electrical appliances Sa
27、fety Part 2-45: Particular requirements for portable heating tools and similar appliances IEC 60529, Degrees of protection provided by enclosures (IP Code) IEC 61558-1, Safety of power transformers, power supplies, reactors and similar products Part 1: General requirements and tests IEC 61558-2-6, S
28、afety of power transformers, power supply units and similar Part 2: Particular requirements for safety isolating transformers for general use BS ISO 12176-2:2008ISO 12176-2:2008(E) 2 ISO 2008 All rights reserved3 Terms and definitions For the purposes of this document, the following terms and defini
29、tions apply. 3.1 operator competent person entitled to assemble polyethylene pipes with electrofusion fittings 3.2 control unit unit implementing the output fusion parameters of voltage or current and time or energy to execute the fusion cycle as specified by the electrofusion fitting manufacturer N
30、OTE Control units are classified with respect to electrical and process characteristics. Different types of control units are defined in 3.2.1 to 3.2.5. 3.2.1 preset control unit control unit providing a stepped output power, preset by the manufacturer and generated at one or several selectable leve
31、ls of voltage or current or energy or time 3.2.2 variable control unit control unit providing a stepped output power generated from variable parameters defined from an external source EXAMPLE Bar code, magnetic card. 3.2.3 multimode control unit control unit providing a stepped output power generate
32、d at several levels of voltage and current and covering the energy input requirements of fittings from several manufacturers within the specification of each system, using at least one preset system associated with one variable system 3.2.4 multipurpose control unit control unit providing a stepped
33、or continuous output power generated at several levels of either voltage or current 3.2.5 universal control unit control unit providing a stepped or continuous output power generated at several levels of both voltage and current coming from a variable system 3.3 data retrieval unit any type of contr
34、ol unit (3.2) allowing the storage of the actual fusion data and permitting a read-out of these data 3.4 automatic control unit any type of control unit (3.2) with automatic data input or fusion cycle control, where the operator (3.1) cannot alter the fusion parameters 3.5 control cycle t fixed peri
35、od of time, composed of an on-load period, t1, and an off-load period, t2, i.e. the total time t = t1+ t2BS ISO 12176-2:2008ISO 12176-2:2008(E) ISO 2008 All rights reserved 33.6 duty cycle tdproportion of the control cycle time, t, for which the output power is on load, t1, expressed as a percentage
36、, i.e. td= t1/(t1+ t2) 100 3.7 output voltage output voltage value expressed as the root mean square (RMS) value (and not peak value) 3.8 reference output voltage output voltage value at 75 % of the maximum output voltage of the control unit 3.9 soft start stepped voltage increases over time periods
37、 of the order of seconds 4 Designation of the different types of control unit The code letters in the designation of the types of control units are given in Table 1. Table 1 Code letters in the designation of the types of control units Type of control unit Code letter Preset control unit (3.2.1) Fif
38、th code letter: F (see A.2.1) Variable control unit (3.2.2) Fifth code letter: V (see A.2.1) Multimode control unit (3.2.3) Fifth code letter: V (see A.2.1) Multipurpose control unit (3.2.4) Fifth code letter: V (see A.2.1) Universal control unit (3.2.5) Third code letter: W (see A.1.3) Fifth code l
39、etter: V (see A.2.1) Sixth code letter: A (see A.2.2) 5 Construction requirements 5.1 General An electrofusion control unit can be a single unit or composed of several separate units. Therefore the control panel and the regulation system may or may not be integrated in a single unit. Where the contr
40、ol unit is to be connected to a power generator, the manufacturer of the unit shall specify the input power requirements. A portable control unit, with its frame (if supplied) and any associated input cable of at least 3 m included, shall not be heavier than 35 kg. The control unit shall not start t
41、he fusion cycle if the fusion parameters introduced are out of the specified working range of the control unit. The control unit should be designed to allow ease of readjustment and maintenance. The control unit should be designed and constructed to allow its safe use in normal field conditions. BS
42、ISO 12176-2:2008ISO 12176-2:2008(E) 4 ISO 2008 All rights reservedThe control unit and its accessories should be designed to minimize the risk of corrosion or mechanical damage due to transport and handling in the field, which are likely to impair the performance of the control unit. The control pan
43、el (e.g. keyboard, display) should be protected from impact damage during transport and handling. 5.2 Electrical safety The control unit shall be protected in accordance with IEC 60529 such that the protection against direct contacts shall be at least to IP5X and the protection against the ingress o
44、f moisture shall be in accordance with class IPX4. All printed circuit boards shall be protected against the effects of condensation. No water shall lodge or accumulate in switches or buttons mounted on the control unit. The control unit and its accessories shall fulfil the safety requirements speci
45、fied in IEC 60335-1 and IEC 60335-2-45 and shall conform to national regulations, if any. 5.3 Cables 5.3.1 General Input and output cables may be disconnectable or permanently connected. The cables shall remain flexible over the whole range of normal operating and storage conditions (i.e. 10 C to +4
46、0 C). A cable winding or storage facility shall be provided on the control unit. Cables may require additional screening to satisfy the conditions required for safe operation of portable power supplies (i.e. isolated or earthed systems) and safety features fitted to the control unit. 5.3.2 Input cab
47、le If a permanently attached input cable is provided, its nominal length shall be at least 3 m and a facility for input cable winding, storage and protection during transport shall be fitted to the control unit. 5.3.3 Output cable The nominal length of the output cable(s) shall be at least 2,5 m. Th
48、e output cable(s) shall be suitable for the following functions: supply of electrical power to the fitting; sensing of the applied voltage and transmission of a feedback signal; supply and return of the identification voltage for the fitting verification procedure (resistance sensing). 5.4 Cable con
49、nectors The connectors shall conform to the requirements given in IEC 60529 (see 5.2) for use in outside weather conditions. The connectors shall have: a) a contact resistance as low as practicable; b) an ability to sense the applied voltage; c) facility of attachment; d) protection against direct human contact when connected to the fitting during the fusion cycle. BS ISO 12176-2:2008ISO 12176-2:2008(E) ISO 2008 All rights reserved 5The connectors should be suitable for typical te
