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Flanges DIN EN 1591 and DIN EN 13445-3 - compliant to PED

Calculation of flanges and flanged connections according to DIN EN 1591 (Oct./01) and DIN EN 13445-3 (May/02)

The new calculation norm is valid for flanges and flanged connections of equal or different flanges. In contrast to the previous standards, the norm has been extended and the latest research results have been considered.

è The module 1591 has been updated according to DIN EN 1591 / edition October 2001.

It is now not a pre-standard any longer. The calculation method has changed in contrast to pre-standard DIN 2505 .

è By the integrated linking of the module 1591 with the supplementary modules AFLT / SFLA / VFLN / 1514 / 269X you don't have to enter the geometrical data or the gasket characteristics for the flange calculation manually.

è The corrosion allowance c2 can be considered and effects the inner diameter of the flange as well as the wall thickness of the hub and the shell. The calcullation can be performed for corroded or non-corroded state. It is also possible to enter any – user-defined- corrosion allowance c2 .

The program comprises the complete DIN EN 1591, respectively the newly published DIN EN 13445-3, and permits the calculation of welded, welding-neck, blind, and lap joint flanges.

The integration of the modules AFLT, SFLA, VFLN and 269X enables you to call up the necessary geometrical data of flanges, bolts and gaskets as well as the gasket characteristics from the included table. After having entered nominal diameter, nominal presure and operating temperature when necessary, the data are automatically transferred to the 1591 module for flange calculation. The temperature dependant gasket characteristics acc. to DIN EN 1591-2 are also included.

Differences to previous calculation methods

Essential advantages compared with the previous calculation standards of AD / ASME are:

  1. Consideration of the non-linear elastic behaviour of the gasket

  2. Consideration of the forces produced by different thermal expansion of flange and bolts

  3. Consideration of additional moments and axial forces

  4. Consideration of influence of the number of mounting cycles on the gasket

By using these extensions, the range of the allowable bolt forces for the installation can be determined. Furthermore, the fluctuation of the allowable bolt force can be specified depending on the bolting technique (e. g. with a wrench, impact wrench, torque controlled wrench with or without measuring equipment). Following this norm, the tightness of a flanged connection under different load cases can be predicted. A flanged connection mounted with a torque controlled wrench needs smaller bolt load than mounting manually. The efficiency of the flanged connection decreases accordingly.

Data input made easy

The selection mask in the module 1591 asks for the necessary data. The data is transferred automatically.

You don't have to look up the geometrical data and gasket characteristics in several different standards. The selection is done step by step:

  1. Selection of flange standard e.g. DIN 26xx, DIN 28034, DIN 28 036

  2. Selection of flange by providing nominal diameter and nominal pressure or flange section

  3. Selection of gasket e.g. flat gasket acc. to DIN 2690

  4. Selection of gasket material e.g. PTFE, soft material gasket (rubber)

  5. Input of operating temperature

These data allow a determination of the geometrical data of flanges, bolts and gaskets as well as the determination of the gasket characteristics.

Tthe data is automatically linked with the module 1591. The values can be overwritten with your own values. You may for example increase the flange thickness to decreas efficiency of the flange.

For the final stress and strain calculation of the flanged connection you just have to add a few values like additional , material of flange and bolts and the number of mounting cycles.

These 6 modules (except 1591) can also be used as supplementary package to AD/B7 and B8. Price on request.

Module

Contents
AFLT: flanges acc. to ASME Geometrical data of different flanges acc. to ASME srtandards
SFLA: welding.neck flanges acc. to DIN 28036 Welding-neck flanges for pressure vessels made of stainless steels DN 300 to DN 2000
1092: welding-neck flanges according EN 1092 (replaces VFLA) Welding-neck flanges PN 6 to PN 100 according DIN EN 1092-1, June 2002
VFLN: welding-neck flanges acc. to DIN 28034 Welding-neck flanges for vessels DN 300 to DN 3200
1514N: geometrical data of flat gaskets acc. to DIN EN 1514, gasket characteristics acc. to DIN EN 1591-2
incl. manufacturer data		 Flat gaskets acc. to DIN EN 1514-1
  • type IBC for type A faces (without nubbin) and type B faces (with nubbin)

  • type TG for type C and type D faces (tongue and groove)

  • type SR for type E and F faces (male and female face)
269X: geometrical data of flat gaskets acc. to DIN 2690/2691/2692/2697, gasket characteristics acc. to DIN EN 1591-2 Flat gaskets

·acc. to DIN 2690 for flanges with plane face PN 1 to PN 40, DN 10 to DN 4000

·acc. to DIN 2691 for flanges with tongue and groove, PN 10 to PN 160, DN 10 to DN 1000

·acc. to DIN 2692 for flanges with male and female face, PN 10 to PN 100, DN 10 to DN 1000

Grooved metal gaskets acc to DIN 2697, PN 64 to PN 400, DN 10 to DN 400, material PTFE, graphite or silver on several steels.

Module package 1591

Incl. module AFLT, SFLA, VFLN, 1514N 269X and material data base

List price: 1.580,- EUR plus VAT

Update price for customers on request

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Literature:

DIN EN 1591 (Oct. 2001) resp. DIN EN 13445-3 (May 2002) – and the standards of the 6 modules mentioned above.

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