LINE BLIND VALVE ASSEMBLY HAVING AN INJECTION SEALING SYSTEM

摘要

A blind assembly for use in a piping circuit that includes a blind element and an injection system. The blind element has a planar portion that is transversely mounted in the piping circuit to block flow through the piping circuit. When the blind element is installed, it has one or more flat surfaces that are in sealing contact with another component of the piping circuit, such as a flange face, to define a sealing interface. A primary seal is provided between the blind element and the other component of the piping circuit and which circumscribes at least a portion of the sealing interface. The injection system is in communication with the sealing interface, and selectively injects a sealant material into the sealing interface to form a redundant seal in the sealing interface and around the primary seal. An injection fitting can mount to the flange for injecting the sealant.

主权项

1. A blind valve assembly for use in a fluids handling circuit having a flange mounted on an end of a tubular, the blind valve assembly comprising:
a blind element comprising a planar surface in communication with an inside of the tubular and that has an outer periphery in sealing contact with the flange to define a sealing interface; a seal provided along the circumference of the sealing interface and that defines a pressure barrier along a radial path; a recess on the planar surface along the sealing interface and that circumscribes the seal; and a sealant injection system in communication with the recess, so that when sealant is injected into the recess, a redundant seal is provided along the recess and that circumscribes the seal.