초록 ▼

Improved methods and apparatus are provided for structurally interconnecting an instrument manifold with a differential pressure assembly having a pair of tapered NPT threaded outlet ports each adjoining an exterior body surface. First and second connector flanges are provided each having a through

Improved methods and apparatus are provided for structurally interconnecting an instrument manifold with a differential pressure assembly having a pair of tapered NPT threaded outlet ports each adjoining an exterior body surface. First and second connector flanges are provided each having a through passageway for transmitting a pressure signal from the corresponding NPT outlet port in the differential pressure assembly to an inlet port in an instrument manifold. Each connector flange includes a tapered threaded end, a flange end, and a threaded portion fixed between the threaded end and the flange end. The apparatus also includes first and second stabilizer members, and first and second tensioning nuts for exerting a compressive force on the stabilizer members such that the stabilizer members will transmit substantially all radially-directed forces to the differential pressure assembly. According to the method of the present invention, each connector flange is rotated for obtaining sealing engagement between each connector flange and a respective port in the differential pressure assembly, and the one or more apertures in the flange end are rotated to a preselected rotational position prior to tightening the tension nuts for exerting force on the stabilizer members.

대표청구항 ▼

A method of structurally interconnecting an instrument manifold with an orifice plate assembly, the instrument manifold having first and second pressure receiving inlet ports, first and second pressure transmitting outlet ports, and plurality of apertures positioned radially outward of a correspondi

A method of structurally interconnecting an instrument manifold with an orifice plate assembly, the instrument manifold having first and second pressure receiving inlet ports, first and second pressure transmitting outlet ports, and plurality of apertures positioned radially outward of a corresponding inlet ports for receiving securing members, the orifice plate assembly including first and second body surfaces and first and second tapered threaded outlet ports each adjoining a respective body surface for transmitting a pressure signal to the instrument manifold, the method comprising: providing first and second connector flanges each having a central axis and a through passageway, each connector flange formed to include a threaded end fixed thereon, a flange end fixed thereon and including at least first and second apertures each spaced radially outward of the through passageway, and a threaded portion fixed thereon axially between the threaded end and the flange end; providing first and second stabilizer members; providing first and second tensioning nuts; positioning each tensioning nut over the threaded end of a corresponding connector flange such that each tensioning nut is supported on a respective connector flange; positioning each stabilizer member over the threaded end of a respective connector flange such that each of the stabilizer members is spaced axially between the corresponding tensioning nut and the orifice plate assembly and radially outward of the threaded end of the respective connector flange; thereafter rotating each of the connector flanges for obtaining metal-to-metal sealing engagement between the threaded end of each of the connector flanges and the respective threaded outlet port in the orifice plate assembly; while maintaining the metal-to-metal sealing engagement, rotating each of the connector flanges such that each of the plurality of apertures in the flange end are at a preselected rotational position; thereafter rotating each of the tensioning nuts with respect to the threaded portion of each of the connection flanges such that each of the tensioning nuts exerts a substantially axially directed force on the corresponding stabilizer member to force the stabilizer member into stabilized engagement with the corresponding body surface on the orifice plate assembly; and fixedly interconnecting the flange end of each of the connector flanges with the instrument manifold while each of the apertures in the flange ends is aligned with the corresponding aperture in the instrument manifold.