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ASBESTOS-FREE MATERIALS FOR GASKETS FOR BOLTED FLANGED CONNECTIONS

Objective


The main conclusions which can be drawn from the project are the following:

- New gasket sheet materials were developed and tests were performed in laboratory conditions. Most of these new materials are distinctly improved in view of e.g. tightening capability, creep strength and load bearing capacity compared to reference materials available on the market at the beginning of the project.

- Gasket factors were defined which realistically describe the behaviour of gasket materials and which allow a realistic assessment of the gasket's performance. A gasket factor data bank is prepared.

- Optimized gasket testing techniques were developed and fixed which guarantee a realistic assessment and evaluation of gasket's performance in view of tightening capability, load bearing, creep resistance and long term behaviour under the influence of time, temperature and medium and therefore a targeted development of new gasket materials; the description of these testing procedures will be the basis for a CEN standard on gasket testing.
These testing techniques were evaluated by comparison of the results received with those of real flanged joint tests. Fairly good agreement was shown between gasket testing and flanged joint tests, so that the testing procedures can be looked as verified.

Figures of gasket factors - related to leak rate or tightness - are determined which allow combined with the new European calculation code pr EN 1591 a strength and tightness analysis of flanged joints. These results can be the basis for gasket factor classification in the CEN calculation code per EN 1591.
Bearing in mind rising standards of immission control and restrictions on the use of gasket materials containing asbestos, the proposed project plans to create the basis for a systematic and optimized development of new gasket materials and to provide realistic evidence of the strength and tightness of flanged joints. The main tasks of the project are:

- to define and set the relevant gasket factors,

- to work out, verify and set the test procedures for the determination of the above mentioned gasket factors,

- to determine the gasket factors for asbestos free materials including the sealing and relaxation properties under realistic operation conditions (medium, temperature, time, pressure, changing loads),

- to draft out European standards for defining gasket factors under testing procedures as well as specifications for gasket materials,

- to create a data basis for a data bank.

Apart from improved technological co-operation in Europe, there will be a positive effect on the competitiveness in many areas of industry and improvements in environmental protection and working conditions.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Staatliche Materialprüfungsanstalt
Address
Pfaffenwaldring 32
70569 Stuttgart
Germany

Participants (22)

BASF AG
Germany
Address

6700 Ludwigshafen
COMPAGNIE ROYALE ASTURIENNE
Belgium
Address
Huysmanslaan 65
1651 Lot
Centre Technique des Industries Mecaniques (CETIM)
France
Address
74 Route De La Joneliere
44076 Nantes
Commissariat à l'Energie Atomique (CEA)
France
Address
Centre D'études De Cadarache Sere-ders
13108 Saint-paul-lez-durance
DU PONT DE NEMOURS INTERNATIONAL SA
Switzerland
Address
Chemin Du Pavillon 2 P.o.box50
1218 Le Grand-saconnex
ELF AQUITAINE
France
Address
22 Luie Des Vosges
92033 Paris La Defense
FRENZELIT-WERKE GMBH & CO KG
Germany
Address
August-mittelsten-scheid-strabe
8582 Bad Berneck
GARLOCK GMBH
Germany
Address
Scheffelstraße 73
4000 Düsseldorf
GEMEINSCHAFTSKERNKRAFTWERK NECKAR GMBH
Germany
Address

7129 Neckarwestheim
HECKER WERKE GMBH & CO KG
Germany
Address
Arthur-hecker-straße 1
7039 Weil Im Schonbuch
HOECHST AG
Germany
Address

6230 Frankfurt Am Main
IDT INDUSTRIE-UND DICHTUNGSTECHNIK GMB
Germany
Address
Adlerstraße 18
4300 Essen
LATTY INTERNATIONAL SA
France
Address
57Bis Rue De Versailles
91400 Orsay
LE CARBONNE-LORRAINE/CEFILAC ETANCHEIT
France
Address
90 Rue De La Roche Du Geai
42029 Saint Etienne
MONTERO FIBRAS Y ELASTOMEROS SA
Spain
Address
Bp 558
48080 Bilbao
Martin Merkel GmbH & Co KG
Germany
Address
Sanitasstraße 17-21
21107 Hamburg
RICH. KLINGER GMBH
Germany
Address

6270 Idstein
SIEM-SUSRANITE
France
Address
1 Rue Villart De Joyeuse
75854 Paris
SIGRI GREAT LAKES CARBON GMBH
Germany
Address
Werner-von-siemens-straße 18
8901 Meitingen
TÜV BAYERN EV
Germany
Address
Westendstraße 199
München
W L Gore & Associates GmbH
Germany
Address
Wernher-von-braun-straße
85640 Putzbrunn
Électricité de France (EDF)
France
Address
Site Des Renardieres
77250 Moret-sur-loing