Page 97 - Industrial Process Plant Construction Estimating and Man Hour Analysis

70 Industrial process plant construction estimating and man-hour analysis

4.2 General scope of field work required for each 400,000lb./h
waste heat boiler 400,000lb./h membrane wall boiler with
superheater scope of work-field erection
Pressure parts

Install steam and mud drums
Steam drum trim piping
Drum internals—remove and reinstall
Generating bank tubes
Install generating tubes
00
00
2-1/2 OD 0.203 Wall thickness, swage, and roll
Ground assembly—headers, furnace, and water wall panels
Assemble headers and wall panels, fit and weld water wall panels to headers
Erect headers and wall panels, fit and weld water wall panels
00
Erect side wall, front, and rear panels—water wall; 2-31/32 OD 0.203 00
WT, BW (TIG)
Fit and weld filler bar at tube welds
Fit and weld filler joining membrane panels
00 00
Fit and weld water wall tubes; 2-31/32 OD 0.203 WT, BW (TIG)
Erect, fit, and weld primary/secondary headers and superheater
elements
Primary superheater headers/coils
10.75 Diameter inlet header
00
20 Outlet header
00
Weld superheater tubes; 1.772 OD 0.150 WT, BW (TIG)
00
00
Burner system
Burner and wind box
Fan with drive
Silencer
Soot blowers
Install rotary and retractable soot blowers and support bearings
Erect and install down comers and steam code piping
Scope of Field Work Required For Structural Steel and Boiler Casing
Erect boiler structural steel
Column line “1” (west)
Column line “6” (east)
Column line “7” (east)
Column line “A” (north)
Column line “B” (north)
Column line “F” (south)
Column line “G” (south)
0
0
Install platform, grating, and handrail @ El. 100 -0 to 184 -0 00
00
Install stair nos. 1 and 2
Erect penthouse steel
Erect casing—generating bank, boiler, and penthouse