EN 1092-1:2018

European foreword
Introduction
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 2014/68/EU Pressure Equipment
         Directive aimed to be covered
Bibliography

This European Standard for 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.This European Standard specifies the flange types and their facings, dimensions, tolerances, threading, bolt sizes, flange jointing face surface finish, marking, materials, pressure/ temperature ratings and approximate flange masses.For the purpose of this European Standard, "flanges" include also lapped ends and collars.This European Standard applies to flanges manufactured in accordance with the methods described in Table 1.Non-gasketed pipe joints are outside the scope of this European Standard.