DVS-2207-1新版标准规范

August 2007DVS-DEUTSCHER VERBANDWelding of thermoplastics▣VSFOR SCHWEISSEN UNDHeated tool welding of pipes,pipelineTechnical CodeVERWANDTE VERFAHREN E.V.components and sheets made of PE-HDDVS2207.1Translation of the German version september 2005Content:2 General requirementsScopeThe quality of welded joints depends on the qualification of the3General requirementswelder,the suitability of the utilized equipment and devices asMeasures before weldingwell as on compliance with the welding standards.The welded3.1Requirements for weldingjoint can be tested by means of non-destructive and/or3.2Cleaningdestructive methods.3.2.1 Cleaning agents3.2.2Cleaning of heated toolsThe welding work must be monitored.Type and range of3.2.3 Cleaning of joining areassupervising has to be agreed between the contract partners.It is4Heated tool butt weldingrecommended to record the welding data in welding protocols4.1Heated tool butt weldingof pipes,pipelinecomponents(sample see appendix)or on data camriers.fittings and sheetsWithin the framework of the quality assurance it is recommended4.1.1 Description of the processto produce and test samples of joints before and during welding.4.1.2 Preparation of welding4.1.3Welding procedureEvery welder has to be trained and has to be in possession of a4.2Heated tool welding of tapping teesvalid qualification certificate.The intended application range may4.2.1 Description of the processbe decisive for the kind of qualification.For the heated tool butt4 2.2 Preparation of weldingwelding of sheets as well as in the industrial piping system4.2.3 Welding procedureconstruction.the technical code DVS 2212-1 is valid.Theectro-socket weldingDVGW-specification GW 330 applies analogously as qualification5.1Description of the processproof for heated tool butt and heated tool socket welding at the5.2Welding deviceconstruction of gas and water supply systems.The welding of5.3Preparation of weldingplastics for indoor applications is described in the technical codes5.4Welding procedureDVs1905-1and-2.6Heated tool socket weldingThe equipment and devices which are used for welding must6.1Description of the processcomply with the requirements in DVS 2208-1.6.2Welding devices6.3Preparation of welding6.4Welding procedure3Measures before weldingTesting of welded joints8Standards and directives3.1 Requirements for welding9ExplanationsThe welding zone must be protected against bad weatherAppendix:Processing instructions (short versions)influences (e.g.wind,moisture).If it is ensured by suitableTesting of welded jointsmeasures (e.g.preheating,tent,heating)that the conditions areWelding protocolssuitable for welding.work may be carried out at any outsidetemperature insofar as the welder is not hindered in his handling(seeexplanation).If necessary,an additional proof must be1 Scopeprovided by carrying out sample welds under the mentionedconditions (section 7).This technical code applies to the heated tool butt welding ofsheets according to DIN EN ISO 14632