Page 167 - Industrial Process Plant Construction Estimating and Man Hour Analysis
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Coal-fired power plant Chapter 8 143
8.3 General Scope of Field Work Required for Each Coal-Fired
Boiler Sheet 2
Furnace Roof/Floor Tubes
Headers—loose
Tubes—loose, furnace including screen
00
00
Weld tubes to header stubs—(2-1/2 < BW 3 TIG) (2001—2600) psi
Furnace 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 Rear Wall Tubes
Furnace rear wall tubes (wall panel—membrane)
Furnace rear wall tubes (loose)
Weld tubes—panel to panel—(2 < BW 2-1/2 TIG) (2001–2600) psi
00
00
Fit and weld filler bar at tube welds
00
00
Weld tubes to header stubs—(2 < BW 2-1/2 TIG) (2001–2600) psi
Fit and weld filler joining membrane panels
Install and weld membrane and scallop bars on nose tubes