TECHNICAL MANUAL - Sharq.biz

welders qualificationThe experience acquired in time showed that, even if the jointing processes ofPE pipelines are today wholly supported by special equipment (welding units,aligning clamps, scrapers, etc), frequently the correct welding procedures arenot respected, therefore compromising the positive result and reliability ofthe jointings with negative effects in term of safety and economic loss. Mainimportance is that the welder is trained and suitably qualified.The qualification certificate according to the standard UNI 9737 is compulsoryfor the personnel employed in the welding of PE pipelines within the Decree ofthe Ministry 16 th April 2008 “Technical rules for design, construction, testing,operating and surveillance of the works and distribution systems and direct linesof natural gas with density not higher than 0,8”. Furthermore it is one of thesuitable requirements for issuing a correct “conformity declaration” accordingto the D.M. n° 37 dated 22 nd January 2008 “Direction of article 11-quaterdecies,comma 13 letter a) Law n. 248 dated 2 nd December 2005, relative to theplant installation activities inside the buildings”. Also the gas distribution andwater networks are included within this application field. With the conformitydeclaration, which is issued at working end, the installation company certifiesthat the network has been built-up according to the updated UNI standards.WeldersqualificationSALDATUREUNIPLASTClassification and qualification of welders for plastic materialsWelders by the heated tool procedure, with mechanical equipment andby electrofusion for pipes and fittings of polyethylene for the supply ofgaseous fuels, water and others fluids under pressureUNI 9737SALDATUREUNIPLASTWelding of plastic materials - Heated tool butt welding. Welding ofpolyethylene pipes and/or fittings for gas, water and others pressure fluidspipelinesUNI 10520SALDATUREUNIPLASTWelding of plastics materials - Electrofusion welding. Welding ofpolyethylene pipes and/or fittings for gas, water and others pressure fluidspipelinesUNI 10521SALDATUREUNIPLASTField welding machines by the heated tool for polyethylene pipes and/orfittings butt joints for gas, water and others pressure fluids pipelines.Functional, test and documentation characteristicsUNI 10565SALDATUREUNIPLASTElectrofusion welding machines and auxiliary equipment for polyethylenepipes and/or joints by electroweldable connections for gas, water andothers pressure fluids pipelines.Construction, test and maintenance requirements, documentationUNI 105669