Bryan Boilers EB Series manual Vessel and Tube Construction, Jacket Construction

EB Series

Steam Boilers

Forced Draft - Gas, Oil, Gas/Oil

The boiler shall be a Bryan Model ___________

flexible water tube water boiler, with a capacity of

______ BTU input and ______ BTU output.

(__________HP)

The boiler shall be constructed and assembled as a completely packaged unit ready for field connections to the steam supply, return connection, electrical power supply, fuel supply(s), relief valve discharge, building management controls and flue-gas vent.

15 PSIG STEAM BOILERS - The boiler shall be manufactured in strict accordance with the ASME Low Pressure Boiler Heating Code, Section IV, and shall bear the ASME “H” stamp for a maximum working pressure of 15 PSIG.

150 PSIG STEAM BOILERS - The boilers shall be manufactured in strict accordance with the ASME Power Boiler Code, Section I, and shall bear the ASME “S” stamp for a maximum working pressure of 150 PSIG.

(Also available for higher pressures up to 250 PSIG and temperatures to 300oF.)

VESSEL AND TUBE CONSTRUCTION

The boiler shall be constructed on a heavy steel frame. The boiler pressure vessel shall be provided with adequately sized upper and lower drums. A minimum of two downcomers shall be provided and shall be located inside the furnace chamber to maximize proper thermal internal water circulation. The boiler steam drum shall be no less than 24” O.D.. The drum shall be provided with internals designed for providing steam quality in excess of 99%. Steel water tubes are to be 1½” O.D., .095 wall thickness minimum, six-pass, flexible serpentine bend design, not subject to thermal shock damage. Individual water tubes shall be easily removable and replaceable without either welding or rolling. The boiler shall have no more than two tube configurations. The boiler shall be furnished with an adequate number of tappings and inspection openings to facilitate internal boiler inspection and cleaning.

FURNACE/COMBUSTION CHAMBER

CONSTRUCTION

Access to the furnace/combustion chamber is gained by a hinged access door(s) with an opening of no less than 26" wide x 62" high maximum to allow for inspection of the interior chamber and the burner head. All remaining panels shall be individually removable. All access panels shall be affixed to the pressure vessel frame and insulated with 2” mineral fiber mono block and 2” high temperature ceramic blanket insulation and be fully gasketed for pressurized firing.

The furnace/combustion chamber shall be primarily of water-wall design with one side of removable panels. The stationary interior wall shall be lined with 1” mineral fiber mono block and 1” ceramic blanket insulation. The front and rear walls are insulated with 4” mineral fiber mono block and 2” ceramic blanket. The floor beneath the tubes shall be lined with 2” mineral fiber mono block insulation and 2” ceramic blanket. The boiler furnace/combustion chamber and flueways shall be designed to operate at a positive 0.50” w.c. at the boiler flue outlet. The boiler will require a “positive pressure” type metal flue.

JACKET CONSTRUCTION

The boiler shall be complete with a metal jacket, 16 gauge, zinc-coated rust resistant steel casing, finished with a suitable heat resisting paint and shall be constructed on a structural steel frame and properly insulated with no less than 1½” fiberglass insulation. Complete jacket and insulation shall be easily removable and reinstalled. The boiler shall incorporate individually removable jacket doors, with handles providing easy access to combustion chamber and access panels. The entire tube area shall be easily accessible for fireside cleaning.

All appropriate controls, where possible, shall be mounted on boiler front.

A tube removal and replacement shall be demonstrated at time of start-up. Demonstration time not to exceed 40 minutes.

The boiler vessel shall be warranted for 25 years against thermal shock on a non-pro-rated basis.

(Continued on Page 2)

Form 2127 Rev 07/01/06 Repl 11/01/04 Page 1 of 2