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.
Evaluation of welding procedures and consumables for hyperbaric GMAW for diverless retrofit tee hot-tap applications
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
International Journal of Offshore and Polar Engineering ; 18 , 2 ; 149-155
2008
7 Seiten, 9 Quellen
Article (Journal)
English
'THOR-2' diverless welding system
Tema Archive | 1988
|Metal-cored welding GMAW consumables development for girth welding of X-100 pipe
Tema Archive | 2007
|Diverless subsea flange connection
Tema Archive | 1999
|Diverless system monitors platform corrosion
Tema Archive | 1978
|