Page 98 - Industrial Process Plant Construction Estimating and Man Hour Analysis

Waste heat boiler Chapter 4 71

4.3 400,000lb./h waste heat boiler estimate data
4.3.1 Drums, generating tubes, headers, side, front and rear wall
panels sheet 1

Description MH Unit
Drums—includes straps and/or U-bolts
100,001–200,000lbs 4.60 Ton
200,001–300,000lbs 3.80 Ton
Steam drum trim piping 260.00 LOT
Drum internals—remove and reinstall 136.00 Boiler
Generating bank tubes
Install generating tubes 0.50 EA
2 1/2 Ends—expand tubes in steam and mud drums 0.44 End
00
0
Headers, furnace, and water wall panels
Headers—loose 4.00 Ton
Shop assembled wall panels with or without headers attached 2.50 Ton
Field tube welding—over 2-1/2 and including 3 TIG (1500PSI) 4.20 EA
00
00
Primary super heater headers/coils 4.20 Ton
Fit and weld filler bar at tube welds 1.00 Space
Fit and weld filler joking membrane panels 0.60 LF
Field tube welding—over 1-1/2 and including 2 TIG (1500PSI) 3.70 EA
00
00
4.3.2 Erect headers and panels, weld water wall tubes, burner, soot
blower, superheater sheet 2

Description MH Unit
Erect headers and wall panels, fit and weld water wall panels
Erect right, left front, rear, and roof panels 2.50 Ton
Fit and weld filler bar at tube welds 1.00 Space
Fit and weld filler joining membrane panels 0.60 LF
Scaffolding and rigging 136.00 Boiler
Fit and weld water wall tubes; 2-31/32 OD 0.203 WT, BW (TIG) 4.20 EA
00
00
Erect, fit, and weld primary/secondary headers and superheated elements
Primary superheater headers/coils (27.5 L 10 W 10.5 H) 4.20 Ton
0
0
00
10.75 Diameter inlet header 4.00 Ton
00
20 Outlet header 4.00 Ton
Weld super heater tubes; 1.772 OD 0.150 WT, BW (TIG) 3.70 EA
00
00
Burner system
Burner and wind box 59.40 Ton
Fan with drive 45.00 Ton
Silencer 60.00 EA
0
Soot blower (24 L 1 -6 diameter 2 -0 H 2,570 lb. per unit 64.00 EA
00
0
0
00