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Inspection and surveillance of metallic pressure vessels during the proof test

Objective



Pressure vessels are used in many industrial fields, for instance refineries, chemical, petro-chemical, biotechnological and cryogenic industries. The safety of vessel exploitation demands qualification tests which are, at present, hydraulic tests. Every pressure vessel has to undergo these qualification tests both at the final acceptance stage before its first usage and on a periodic basis during its life span. The advantage of the regulatory hydraulic proof test is that it verifies whether the pressure vessel is capable of withstanding the maximum service pressure. However it is costly and still gives little information about the integrity of the structure. In particular, it cannot detect the presence of evolving defects. In certain cases there is a risk, firstly of causing defects which will evolve without being detected and, secondly, of affecting the performance of the vessel with ice formation and corrosion as a result of the moisture that remains. Pneumatic tests of vessels is a way to overcome these difficulties, but could be widely used and specified in regulations only when the safety of such tests can be guarantied. The aim of the project is to develop and validate a real time surveillance method to ensure the safety of pneumatic tests on pressure vessels, using Acoustic Emission measurements (A.E.). This surveillance method will enable a decision to be made as to whether vessel pressurization should continue or be stopped when changes affecting a defect of a dangerous nature are detected and located. The real time decision of the detection of an evolving defect and the eventual stopping of the vessel pressurization will be supported by a system based on a neural network. The method will answer to industrial specifications for pressurisation tests (security requirements, cost requirements, admissibility with certification organizations and insurance companies, link with standardization). it will cover the settlement of a European database prototype, the development of a validated monitoring system and the definition of a test procedure which will be developed and validated in situ conditions.

Funding Scheme

CRS - Cooperative research contracts

Coordinator

BSL Industries
Address
108 Route De Reims
02203 Soissons
France

Participants (7)

ARSOPI - Indústrias Metalúrgicas Arlindo S.Pinho, SA
Portugal
Address
Relva - Vila Chã
3730 Vale De Cambra
Alpenländische Industriegase & Textilchemie Werke
Austria
Address
11,Aichham
4650 Lambach
Bartem
France
Address
375,Rue Jean Rastand
26800 Portes-les-valence
Centre Technique des Industries Mécaniques
France
Address
Avenue Felix Louat 52
60300 Senlis
INSTITUTE OF MECHANICAL ENGINEERING AND INDUSTRIAL MANGEMENT
Portugal
Address
174-214,Rua Do Barroco 174/214
4465-591 Sao Mamede De Infesta
TECHNISCHER UEBERWACHUNGSVEREIN OESTERREICH
Austria
Address
10,Deutschstrasse 10
1230 Wien
VALLEN-SYSTEME GMBH
Germany
Address
26,Schaeftlarner Weg 26
82057 Icking