Page 166 - Industrial Process Plant Construction Estimating and Man Hour Analysis

142 Industrial process plant construction estimating and man-hour analysis

8.2 General scope of field work required for each coal-fired
boiler sheet 1

Scope of Work-Field Erection
Pressure Parts
Install Drum, Erect Headers & Panels, Furnace Wall & Roof Tubes,
Weld Tubes & Panels
Install Steam Drum
Drums include straps and/or U-bolts: steam drum (200,001 lb Weight
300,000 lb)
Steam drum trim piping
Drum internals—remove and reinstall
Set rigging for hoisting assemblies
Hoist into place
Headers, Furnace and Water wall Panels
Boiler Sidewall Tubes
Headers—loose
Wall panels—shop assembled without headers
00
00
Weld tubes—panel to panel—(2 < BW 2-1/2 TIG) (2001–2600) psi
Fit and weld filler bar at tube welds
Weld tubes to header stubs—(2 < BW 2-1/2 TIG) (2001–2600) psi
00
00
Fit and weld filler joining membrane panels
Furnace Front Wall Tubes
Headers—loose
Wall panels—shop assembled without headers
00
Weld tubes—panel to panel—(2 < BW 2-1/2 TIG) (2001–2600) psi
00
Fit and weld filler bar at tube welds
Weld Tubes to header stubs—(2 < BW 2-1/2 TIG) (2001–2600) psi
00
00
Fit and weld filler joining membrane panels