SIST EN 13705:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Schweißen von Thermoplasten - Maschinen und Geräte für das Warmgasschweißen (einschließlich Warmgas-Extrusionsschweißen)Soudage des thermoplastiques - Machines et appareillages pour le soudage au gaz chaud (y compris le soudage par extrusion)Welding of thermoplastics - Machines and equipment for hot gas welding (including extrusion welding)25.160.30Varilna opremaWelding equipmentICS:Ta slovenski standard je istoveten z:EN 13705:2004SIST EN 13705:2004en,fr,de01-oktober-2004SIST EN 13705:2004SLOVENSKI
STANDARD



SIST EN 13705:2004



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13705July 2004ICS 25.160.30English versionWelding of thermoplastics - Machines and equipment for hot gaswelding (including extrusion welding)Soudage des thermoplastiques - Machines et appareillagespour le soudage au gaz chaud (y compris le soudage parextrusion)Schweißen von Thermoplasten - Maschinen und Geräte fürdas Warmgasschweißen (einschließlich Warmgas-Extrusionsschweißen)This European Standard was approved by CEN on 23 April 2004.CEN members are bound to comply with the CEN/CENELEC Internal 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 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13705:2004: ESIST EN 13705:2004



EN 13705:2004 (E) 2 Contents page Foreword.3 1 Scope.4 2 Normative references.4 3 Requirements.4 3.1 General requirements.4 3.1.1 Marking.4 3.1.2 Documentation.4 3.1.3 Accessories – Nozzles.4 3.2 Hot gas welding requirements.5 3.2.1 Manual welding equipment.5 3.2.2 Continuous liner welding machines.7 3.3 Extrusion welding requirements.7 3.3.1 General.7 3.3.2 Automatic shut down.8 3.3.3 Requirements for the plastification system.8 3.3.4 Requirements for the preheating system.9 3.3.5 Requirements for the welding head.10 3.3.6 Requirements for the welding shoe.10 3.3.7 Requirements for pressing tools.10
SIST EN 13705:2004



EN 13705:2004 (E) 3 Foreword This document (EN 13705:2004) has been prepared by Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by IBN. 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 January 2005, and conflicting national standards shall be withdrawn at the latest by January 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
SIST EN 13705:2004



EN 13705:2004 (E) 4 1 Scope This document specifies general performance requirements of the machines and equipment for welding by hot gas of semi-finished products made from thermoplastics, including hot gas extrusion welding. 2 Normative 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. EN 562, Gas welding equipment — Pressure gauges used in welding, cutting and allied processes. EN ISO 2503, Gas welding equipment — Pressure regulators for gas cylinders used in welding, cutting and allied processes up to 300 bar (ISO 2503:1998). 3 Requirements 3.1 General requirements 3.1.1 Marking All machinery and equipment shall be permanently and clearly marked detailing manufacturer, type of machinery/equipment, serial number or production characteristic number, characteristic data and mains supply. 3.1.2 Documentation Operational and servicing requirements shall be provided with each item of equipment. The minimum details are:  technical description of the equipment;  specification of suitable welding nozzles;  servicing schedule;  fault diagnosis and recommended corrective action. A list of possible malfunctions and errors is recommendable, also containing their causes and details of how they can be remedied. 3.1.3 Accessories – Nozzles Welding nozzles shall be designed to be firmly fastened during operation but easily removable for interchangeability. The material used for nozzles shall be corrosion resistant, shall not produce particulates and not be of copper or copper alloy. SIST EN 13705:2004



EN 13705:2004 (E) 5 3.2 Hot gas welding requirements 3.2.1 Manual welding equipment 3.2.1.1 Equipment with external air supply 3.2.1.1.1 General The welding gun is composed of handle, heater element and shroud, gas feed hose and electricity supply cable. The design shall be suitable for continuous use without overheating the handle or hot gas temperature variations once set. 3.2.1.1.2 Design and construction  Optimum position of centre of gravity;  functionally designed handle;  infinitely variable adjustment of power consumption;  control built into the handle designed and arranged so that accidental actuation is prevented;  handle material impact resistant, temperature-resistant, heat-insulating and non-conductive;  hoses and cables light and flexible;  hoses that exhibit no permanent deformation after they have been squeezed. 3.2.1.1.3 Air supply For hot gas welding, air is generally used which is supplied from a compressed air circuit, a compressor, a pressure-gas cylinder or a blower.  The air supplied should be as free as possible from water, oil and other pollutions. If the air is taken from a compressed air circuit or compressor, appropriate oil and water filters shall be fitted.  The volume of air supplied to the equipment shall be adjustable and kept constant. 3.2.1.2 Equipment with built-in blower 3.2.1.2.1 General The equipment consists essentially of handle, built-in blower, shroud, heater, nozzle and connection cable. It can be used where there is no external air supply. However, because of its dimensions and weight it is less suitable for longer welding operations. 3.2.1.2.2 Design and construction 3.2.1.1.2 applies. The following further requirements shall also be met:  the fan shall supply the volume of air required for all the nozzles to be used for welding the various types of plastics; heating can be switched off when the fan is operating;  the electrical circuit shall ensure that the heating can only be switched on when the fan is also operating. SIST EN 13705:2004



EN 13705:2004 (E) 6 3.2.1.3 Accessories 3.2.1.3.1 Nozzles The following requirements apply, in addition to those given in 3.1.3:  to reduce heat radiation, nozzle surface shall be as smooth as possible, for example polished;  to reduce friction, the inside surfaces of draw-nozzle sliding contacts shall be polished. The same applies to the sliding surfaces of tack-nozzles;  to avoid air turbulence at nozzle outlet, round nozzles shall have a straight length of at least 5 x D before the mouth (D = outlet diameter of nozzle). 3.2.1.3.2 Temperature measuring equipment The hot gas temperature is the maximum temperature measured inside the nozzle. It is measured inside the nozzle outlet (with speed-nozzles, the main nozzle aperture) at a depth of 5 mm. Precise measurement of this temperature is possible using a thermocouple which has welding bead diameter ≤ 1,5 mm. Before measurement, the welding equipment includ
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