DIN2616-2-Steel-butt-welding-pipe-fittings-Reducer-for-use-at-full-service-pressure

Hebei maann.coroupDEUTSCHE NORMFebruary 1991Steel butt-welding pipe fittings丽Reducers for use at full service pressure2616Part 2Formstucke zum EinschweiBen;This standard,together with February 1991Reduzierstucke;voller Ausnutzungsgradedition of DIN 2616 Part 1,supersedes June1964 edition of DIN 2616.In keeping with current practice in standards published by the International Organization for Standardization (ISO),a comma hasbeen used throughout as the decimal marker.Dimensions in mm￥9g9年8月g日1Field of applicationThis standard specifies seamless and welded,concentric and eccentric steel reducers that are intended to be butt weldedto pipes and that are rated for the same internal pressure as plpes having a wall thickness as specified in tables 1 and 2(cf.clause 4).2Types,dimensions and designationTable 1.Minimum transition radiiMinimum radius,rNominal sizeReducer typeDNConcentricEccentric15to50202065to1003030125t03004030350t0600100100700 or more1501202.1Concentric reducers(K)Detail WDetail XDimensions 12 and laare to be calculated from theDNDN2following formulae:2min=0,5d1·s1la min =0,5.d2s2Figure 1.Concentric reducerDesignation of a welded (W),concentric (K)reducer in accordance with this standard (2).where d is equal to 114,3 mm,s1 isequal to 3,6 mm,d2 is equal to 60,3 mm,and s2 is equal to 2,9 mm,made from material belonging to material group B as inDIN2609(B):Reducer DIN2616-2-K-114,3×3,6-60,3×2,9W-BContinued on pages 2 to 13Beuth Verlag GmbH,Berlin,has the exclusive right of sale for German Standards (DIN-Normen)DIN 2616 Part 2 Engl.Price group 100891Sales No.0110Email:sales@haihaogroup.comwww.haihaopiping.com