The use of fully remotely installed retrofit tees for hot-tapping applications is an extremely attractive economic option for maximising the potential of oilfields. A diverless hot-tap tee system is in the process of being built and commissioned, with hyperbaric GMA (Gas-Metal Active) welding selected as the internal saddle seal welding method. Process capability has previously been demonstrated in the range of 145 to 1,000 m using a specially developed 1.0-mm metal-cored wire. This paper considers the performance and application of a 0.9-mm Inconel 625 wire for hot-tap welding. A direct comparison of the performance of the 2 wires is made: process and electrical stability; metallurgical analysis; and macro quality and mechanical properties.


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    Title :

    Evaluation of welding procedures and consumables for hyperbaric GMAW for diverless retrofit tee hot-tap applications


    Additional title:

    Bewertung von Schweißverfahren und Verbrauchsmaterialien für das hyperbarische Gas-Metall-Aktivschweißen für das Anbauen von T-Rohren an in Betrieb befindliche Rohrleitungen ohne den Einsatz von Tauchern


    Contributors:


    Publication date :

    2008


    Size :

    7 Seiten, 9 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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