Page 130 - Industrial Process Plant Construction Estimating and Man Hour Analysis

104 Industrial process plant construction estimating and man-hour analysis

6.5 General scope of field work required for each field erected
package boiler sheet 1

6.5.1 Scope of work-field erection
A two-drum, bottom-supported multiple gas pass unit, prefabricated, knocked
down for field assembly and erection.
Pressure parts

Install steam and mud drums; include straps or U-bolts and miscella-
neous welding
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
Baffles, metallic; place and weld with clips
Floor and hopper support steel; place and weld
Tube furnace and convection
Outer casing includes welding
Inner casing includes welding
Wind box
Burner
Weight<¼600lb
600lb < weight<¼1000lb
Weight>1000lb

Floor plate
Sootblower wall boxes include welding
Sootblower piping includes welding
Pipe and fittings
Doors and frames; place and weld to tubes and/or casing
Feedwater regulator
Shop-assembled superheaters
00
00
Tube welding; over 2-1/2 and including 3 TIG (1000 PSI)
Auxiliary equipment
Air heater
Support steel and interconnecting ductwork
Damper
Damper and junction piece
Set and assemble forced draft (FD) fan