Pipe flange design and analysis to…

Pipemill: for the design, analysis and layout of piping components

ASME VIII & PD 5500 | EN1591 & EN13445

The pipe flange design method to EN codes (i.e. strain-based) represents a new approach to flange analysis and design. This Pipemill program is included to provide an alternative and potentially superior method to the traditional one found in ASME VIII / PD 5500.

Types of flange and gasket analysed

Currently, integral pipe flanges of all types with flat or ring type joint gaskets may be analysed.

Design factors allowed for

Pressure, external bending and axial forces at the flange are all taken into account in the program (detail, right, of ring joint dimensions used as part of the input data).

The strain-based analysis also allows for elasticity of the entire flange, bolt and gasket assembly.

Prevention of flange leakage is a paramount criterion.

Flange analysis output

Screen and printed results are limited to pertinent data, helpful scale plots and component weights. Angular deflection of flange faces under load, and resulting edge clearance, are presented.

Comments on the strain-based analysis method

The strain-based analysis method is mathematically complex. It is not feasible to present on screen or hard copy all the intermediate steps leading to the final results.

Analysis support

  • Example analyses
  • Integral database of commonly available pipe sizes, with automatic input of selected pipe data
  • Extensive help files: explanatory comments on many of the key inputs; gasket characteristics and data; bolting
  • Expansion and materials data
  • Scientific calculator
Input screen (bolting) for flange design/analysis to EN codesDetail of input screen (ring joint) for flange design/analysis to EN codesAn output screen (rtj ring gasket detailed) for flange design/analysis to EN codes


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