DIN EN 1092-1:2008 pdf free.Flansche und ihre Verbindungen -Runde Flansche fur Rohre, Armaturen, Formsticke und Zubehorteile, nach PN bezeichnet – Teil 1: Stahlflansche.
5 General requirements
5.1 Materials
5.1.1 General
Flanges and collars to be used in pressure equipment shall be manufactured from materials fulfilling the essential safety requirements of the Directive 97/23/EC. Materials specifications which meet the requirements for this European Standard are given in Table 9 (see also Annex D). Collars type 35 to 37 shall only be manufactured of austenitic/austenitic ferritic steel. The fabricated flange shall fulfil the mechanical properties of the material standard. WARNING — The restrictions of the different material standards have to be followed. NOTE 1 The materials given in Table 9 (see also Annex D) are tabulated in groups. NOTE 2 The materials of ancillary components (for example rings according to Annex H) are not within the scope of this
European Standard.
5.1.2 Methods of manufacture related to base material
Methods of manufacture see Table 1.
5.2 Repairs by welding
With the exception of weld repairs according to 5.11 repairs by welding are permitted only by written agreement of the purchaser.
Within the certificate for material or component relevant documents shall be noted, that approved welding procedure and welders qualification (see 5.11) have been applied.
5.3 Bolting
Flanges shall be suitable for use with the number and size of bolting as specified in Tables 10 to 21. The bolting shall be chosen by the equipment manufacturer according to the pressure, temperature, flange material and gasket so that the flanged joint remains tight under the expected operating conditions. For selection of bolting, see EN 1515-1, for combination of the materials of flanges and bolting see EN 1515-2, for information.
5.4 Gaskets
The various gasket types, dimensions, design characteristics and materials used are not within the scope of this
European Standard. Dimensions of gaskets are given in the series of standards EN 1514.
5.5 Determination of p/t ratings
p/t ratings for flanges according to this standard shall be calculated in accordance with the rules given in Annex F.DIN EN 1092-1 pdf download.