Page 170 - Industrial Process Plant Construction Estimating and Man Hour Analysis

146 Industrial process plant construction estimating and man-hour analysis

8.6 General scope of field work required for each coal-fired
boiler sheet 5

Scope of Work-Field Erection
Pressure Parts
Supply and Riser Tubes, Down comers, Boiler Equipment, Burners,
Economizer and Diamond Soot blowers
Bare Tube Economizer
Tube sections
Headers
Integral support steel
Set rigging for hoisting assemblies
Hoist into place
00
Weld tubes to header stubs—(2 00 < Ring Weld 2-1/2 ) SMAW
(2001–2600) psi
Fit and weld filler bar at tube welds
Casing and hoppers including doors

Supply and Riser Tubes
Headers
Tubes—make up or supply
Tubes—riser
00
00
Weld tubes to header stubs—(4 < BW 4-1/2 TIG) (2001–2600) psi
Down Comers
Install down comer
Diameter weld, girth
Diameter weld, ring
Diameter weld, ring