PREN 1092-1 : DRAFT 2016

European foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Designation
5 General requirements
Annex A (normative) - Wall thickness and end
        preparation for flanges type 11, 34, 35, 36, 37
        and pipe nominal thicknesses for the use with
        type 01 flanges
Annex B (informative) - Material groups
Annex C (informative) - Approximate masses of flanges and collars
Annex D (informative) - Additional materials
Annex E (normative) - Basis of flange calculation
Annex F (normative) - Determination of p/t-ratings
Annex G (normative) - p/t-ratings for a selection of EN materials
Annex H (informative) - Rings for flanges with groove
Annex I (informative) - Flanges with fixed inner diameter
Annex J (informative) - Mating dimensions for flanges with higher DN
Annex ZA (informative) - Relationship between this
         European Standard and the Essential
         Requirements of EU Directive 97/23/EC
         Pressure Equipment Directive
Bibliography

Defines a single series of flanges specifies requirements for circular steel flanges in PN designations PN 2,5 to PN 400 and nominal sizes from DN 10 to DN 4000.