Patent ID: 8640764

Claim:
A method of making a fluid pressure vessel of the type having flow through filters therein with a removable lid/closure for filter access comprising: (a) seam welding sheet stock and forming a first portion of a tubular shell; (b) casting a one-piece closure with an integrally formed outlet fitting thereon and welding the closure to one end of the first portion of the tubular shell; (c) casting a one-piece bulkhead having a control inlet port therein and a plurality of filter receiving apertures and having an annular rim flange forming a second portion of the tubular shell and a plurality of radially outwardly extending lugs and an annular seal groove therein and welding the second portion of the tubular shell to an end of the first portion of the tubular shell opposite the one end; (d) casting an inlet fitting and inserting one end of the inlet fitting through an aperture in the first section tubular shell and securing the one end to the bulkhead central inlet port and welding the inlet fitting to the aperture; (e) casting a one-piece closure/lid having a plurality of radially outwardly extending lugs and disposing the closure/lid for removably closing on the rim flange; (f) disposing filter media elements through the filter receiving apertures into the tubular shell; and, (g) providing fasteners and interconnecting the lugs on the second portion of the tubular shell with the lugs on the closure/lid and securing the closure/lid on the annular flange.