TECHNICAL MANUAL - Sharq.biz

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electrofusion transition fittingis made of an eletrofusion fitting arranged with brass nickel or chromate threadinsert, male or female, or with free nut. It is available in the type socket, 90° and45° elbow.electrofusion transition spigot saddlethe upper part of the transition saddle is supplied withbrass female thread insert which allows the directbranch with metallic pipe. The special version withdouble thread and internal/external cap allows theinsert of the shut-off equipment and the subsequentrestoration after in-line repair interventions.20
uttfusion jointing“Welding with heated elements by contact”, commonly named buttfusion jointingis defined as the jointing proceeding of two elements (pipes and/or fittings) wherethe surfaces to be welded are at first heated by contact with an heating elementand subsequently, after the removal of the heating plate, are joined together withpressure in order to obtain the welding. The process is defined by the standardUNI 10520.The welder must be qualified according to the standard UNI 9737 for the classesPE-2 or PE-2-D.compatibilityThe buttfusion jointing is applicable to PE 80 and PE 100 pipes and fittingswith the same nominal diameter (preferably higher than 50 mm), equal SDR(therefore, same nominal thickness) and melt flow index “MFR” comprised in therange:0,2 ÷ 1,4 g / 10 min (190°C / 5 kg)ambient conditionsWelding must take place in a dry site and ambient temperature field comprisedbetween:-5°C ÷ +40°CButtfusionjointingWhen necessary, suitable protection measures must be taken to protect thewelding operation from adverse ambient conditions such as portable tents,equipped boxes or others. It is absolutely forbidden the use of gas torch or flameburners in order to increase the temperature surfaces to be welded.preliminary controlsThe Operator must arrange himself in order to have the complete visual controlon the different operations and must have the necessary space to work withoutconstraints, in a dry place and whatsoever possible on a level surface.The components must be collected from storage according to the updatedstandards and must be checked before the start of the welding operations;particularly, it is necessary to verify that the inside and outside surfaces ofthe pipes and/or fittings, near to the ends to be welded, are free of cuts andabrasions that can compromise the correct welding and that the tolerancesrelative to thickness, to medium external diameter and to maximum ovalizationallowed by the product standards are respected.Furthermore, before starting all welding operations it is necessary to evaluate21
Page 4 and 5: The content of this manual is updat
Page 7 and 8: tablesrelationship between SDR, ser
Page 9: pipe/fitting dimensionsUNI EN 12201
Page 12: training courseswelders classificat
Page 15 and 16: standard referencesThe references g
Page 17 and 18: CIGTransport and supply of gas - Pi
Page 19 and 20: jointing systemsThe most important
Page 21: transition systemsThe metal/PE fitt
Page 25 and 26: external nominal diameter[d n ]cont
Page 27 and 28: welding cycle at single pressureY(P
Page 30: phase 3removal of the heating plate
Page 33 and 34: synoptic tablephases and parameters
Page 35 and 36: phase 1hauling and pre-heatingPosit
Page 37 and 38: synoptic tablephases and parameters
Page 39: automatic buttfusion machinesThe st
Page 42 and 43: Visually check that the pipes are f
Page 44 and 45: cleaningJust before the jointing wi
Page 46 and 47: weldingConnect the plugs of the con
Page 48 and 49: scrapingClean the pipe from dust, d
Page 50 and 51: coolingThe cooling time of the join
Page 52 and 53: automatic reading systemsof the wel
Page 54 and 55: polyvalent ef unitThe electrofusion
Page 56 and 57: ancillary equipmentaligning clamp
Page 59 and 60: inspection of weldedjointingsEither
Page 61 and 62: electrofusion welding UNI 10521visu
Page 63 and 64: uncorrect pipe cutuncorrect pipe cu
Page 65 and 66: transport and storageThe guidelines
Page 67: uttfusion fittingsThese items are g
Page 70 and 71: The laying of polyethylene pipes ou
Page 72 and 73:
water pipelinesThe reference standa
Page 74 and 75:
gas and water pipeline layingThe in
Page 76 and 77:
signalsIt is necessary to lay over
Page 78 and 79:
gas installation for domestic usesu
Page 80 and 81:
testing procedureThe testing proced
Page 82:
Edition September 2010
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