PREN 10253-4 : DRAFT 2017

European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Classification of grades and designation
6 Information to be supplied by the purchaser
7 Resistance to internal pressure
8 Manufacturing process
9 Technical requirements
10 Appearance and internal soundness (delivery conditions)
11 Dimensions and tolerances
12 Inspection
13 Sampling
14 Test methods
15 Marking
16 Protection and packaging
Annex A (normative) - Dimensions
Annex B (normative) - Determination of pressure
        factors and wall thickness
Annex C (normative) - Pressure factor Tables for
        fittings of type A
Annex D (informative) - Wall thickness tables for
        fittings of type B
Annex E (informative) - Reference data of strength
        values for creep rupture of austenitic steels in
        the solution annealed condition
Annex ZA (informative) - Relationship between this
         European Standard and the Essential Requirements
         of EU Directive 2014/68/EU
Bibliography

Defines the technical delivery requirements for seamless and welded butt-welding fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of austenitic and austenitic-ferritic (duplex) stainless steel in two test-categories which are intended for pressure purposes at room temperature, at low temperature or at elevated temperatures, and for the transmission and distribution of fluids and gases.