English to Spanish Tech/Engineering Metallurgy / Casting

Estoy traduciendo una Norma para soldadura de tuberías y uno de los capítulos habla de "Welded Leak Box Repair". Lo describe de la siguiente manera: "A welded leak box consists of an enclosure used to seal off or reinforce a component. ... Leak repair boxes can have a variety of shapes(e.g., cylindrical, rectangular, with either flat or formed heads), often following the contour of the pipe or component being repaired. Leak repair boxes can also be used to enclose components such as flanges and valves or
fittings, branches, nozzles or vents and drains....The annular space between the leak repair box and the repaired component can be left empty, or filled or lined with epoxy, sealant, fiber, refractory materials, or other compounds."