The Los Angeles County Metropolitan Transportation Authority (LACMTA) has a large fleet of CNG buses and several CNG refueling sites. Filtration canisters are installed in the fueling systems to remove incidental particulate matter in the gas stream.On three occasions, refueling system filter canisters ruptured and caused damage to nearby buses. This paper describes the failure investigation that was performed after one of these incidents. The elements of the investigation included determination of the root cause of failure, metallurgical examination of both incident and exemplar canisters, and non-destructive testing of similar components still in service. It also describes a hazard analysis, which was performed to help identify and rank other process hazards associated with CNG refueling operations. Since the completion of this investigation, all similar filters in the MTA system were replaced with improved canisters, constructed from higher strength materials.The investigation concluded that the filter canister ruptured due to a fatigue crack, having been subjected to approximately 100,000 pressurization/depressurization cycles. Upon inspection, an exemplar canister was found to exhibit a manufacturing defect that could reduce its fatigue life from 10,000,000 cycles (several hundred years) down to as little as three years. The hazard analysis uncovered no potential hazards that were ranked unacceptable or undesirable.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    CNG Filter Canister Failure and System Reliability Analysis


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    Future Transportation Technology Conference & Exposition ; 2001



    Erscheinungsdatum :

    20.08.2001




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    CNG filter canister failure and system reliability analysis

    Agrawal, S.K. / Martin, R.J. | Tema Archiv | 2001


    2001-01-2471 CNG Filter Canister Failure and System Reliability Analysis

    Agrawal, S. K. / Martin, R. J. / Society of Automotive Engineers | British Library Conference Proceedings | 2001


    - AIR FILTER-CANISTER ASSEMBLY

    KIM CHANG HAN / LIM JUN SIK / CHOI SEUNG HOON et al. | Europäisches Patentamt | 2022

    Freier Zugriff

    Air filter assembly with charcoal canister

    YI ZHANG | Europäisches Patentamt | 2017

    Freier Zugriff