UNI EN 12573-4 : 2001

Foreword
1 Scope
2 Normative references
3 Symbols and abbreviations
4 Design requirements
      4.1 General
      4.2 Design principles
5 Calculation of the properties of bolts
      5.1 General
      5.2 Calculation of the bolt forces in the case of
             continuous gaskets
      5.3 Calculation of the bolt forces in the case of
             O-ring gaskets
6 Calculation of the flange thickness
      6.1 General
      6.2 Fusion welded, moulded full face flanges and
             welded-on full face flanges with a continuous
             gasket or with an O-ring gasket
      6.3 Fusion welded stub flanges and weld-on stub
             flanges with continuous gasket or with an
             O-ring gasket
7 Calculation of loose metal backing rings
Annex A (normative) Material parameters for loose metal
                    backing rings
Annex B (informative) A-deviations
Bibliography

Specifies design and calculation of circular flanged joints, fabricated in the following thermoplastics: Polyethylene (PE), Polypropylene (PP), Poly (vinyl chloride) (PVC), Poly (vinylidene fluoride) (PVDF).