Alerte sur les défaillances de la sécurité des soupapes : mise à jour de mai 2012. Recommandations.
Valve failure safety alert: May 2012 update. Guidance Note.
Auteurs : Institute of Refrigeration
Type d'article : Article de périodique, Norme/Recommandation
Résumé
Further failures of this type of valve have been reported since the original guidance note was issued in May 2011 and it is clear that some of these failures are not due to corrosion. The assembly of the valve is susceptible to lack of complete fusion of the brazing filler ring, which in turn weakens the joint of the side port to the valve body. The Institute of Refrigeration recommends that all such valves, where the valve nozzles are brazed into the main body, should not be used on ammonia refrigeration plant. Any valves fitted to existing systems should be carefully examined. If there is any doubt as to their integrity they should be replaced immediately with a suitable valve manufactured with a one-piece body, and should be treated with extreme care until they are replaced. This should include clearly labelling the valve with a warning, protecting it from accidental mechanical impact and using appropriate PPE when working on the system in the vicinity of the valve.
Détails
- Titre original : Valve failure safety alert: May 2012 update. Guidance Note.
- Identifiant de la fiche : 30004880
- Langues : Anglais
- Sujet : Réglementation
- Source : Institute of Refrigeration, Guidance Note - n. 22
- Date d'édition : 05/2012
Liens
Voir la source
-
Statement concerning the proposal to bring the ...
- Date : 24/01/1997
- Langues : Anglais
- Source : Norme int. ISO/Int. Stand. ISO/CEN, TC 182 - CEN-TC 182-WG 2-prEN 12284; N 523; 11 p.; 3 fig.
Voir la fiche
-
Refrigerating systems and heat pumps. Valves: r...
- Date : 02/1997
- Langues : Anglais
- Source : CEN, Draft eur. Stand. - CEN 182-W114 2-prEN 12284; append. B; 7 p.; 1 tabl.
Voir la fiche
-
Standard for refrigerant access valves and hose...
- Auteurs : ARI
- Date : 2002
- Langues : Anglais
Voir la fiche
-
Refrigerant access valves and hose connectors.
- Auteurs : ARI
- Date : 1997
- Langues : Anglais
Voir la fiche
-
Ammonia safety by design and maintenance.
- Auteurs : PACHAI A. C.
- Date : 07/05/2009
- Langues : Anglais
- Source : 3th Conference on Ammonia Refrigeration Technology. Proceedings: Ohrid, North Macedonia, May 7-9, 2009.
- Formats : PDF
Voir la fiche