DIN2605-1-Steel-butt-welding-pipe-fittings-Elbow-and-Bends-with-reduced-pressure-factor

Hebei upe 621.643.062roupDEUTSCHE NORMFebruary 1991Steel butt-welding pipe fittings西Elbows and bends with reduced pressure factor2605Part 1Formstucke zum EinschweiBen;Supersedes DIN 2605,Rohrbogen;verminderter AusnutzungsgradSeptember 1962 edition,andDIN 2606,July 1965 edition.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 mm1 Field of applicationThis standard specifies seamless and welded steel elbows and bends that are intended to be butt welded to pipes.Althoughthe wall thicknesses specified correspond to those of the pipes,these fittings do not permit operation at the same internalpressure as the pipe welded on,i.e.they have a reduced pressure factor(cf.table1 and clause5).2 Types and designation45°elbow90°elbow1B0°bend62br is to be calculated as follows:type 2:r=1,0.datype3:rm1,5·dtype 5:r 2,5.datype10:r≈5,0：datype 20:r=10.0.daDesignation of a type 3(3)seamless(S)90(90)elbow in accordance with this standard(1),where da is equal to 88,9 mmand s is equal to 2,3 mm,made from material belonging to material group G as in DIN2609(G):Elbow DIN2605-1-90-3-88,9×2,3S-GContinued on page 2 to 6Beuth Verlag GmbH.Berlin,has the exclusive right of sale for German Standards (DIN-Normen).DIN 2605 Part 1 Engl.Price group 608.91Sales No.0106Email:sales@haihaogroup.comwww.haihaopiping.com