Page 252 - Industrial Process Plant Construction Estimating and Man Hour Analysis

230 Industrial Process Plant Construction Estimating and Man-Hour Analysis

11.7 Waste heat boiler, 500,000 lb/h installation estimate
11.7.1 Drums, generating tubes, headers, side, front & rear panels
sheet 1

Historical Estimate
Description MH Unit Qty Unit BM

Install steam and mud drums 1245
Steam drum and drum saddles 3.8 TON 132.6 TON 504
Mud drum and drum saddles 4.6 TON 75.0 TON 345
Steam drum trim piping 260.0 LOT 1.0 LOT 260
Drum internals—remove and reinstall 136.0 Boiler 1.0 Boiler 136
Generating bank tubes 4354
00
00
2-1/2 OD 0.203 wall thickness, swage,
and roll
Install generating tubes 0.50 EA 3154.8 EA 1577
2 1/2 Ends—expand tubes in steam 0.44 End 6309.6 End 2776
0
00
and mud drums
Ground assembly—headers, furnace, 3230
and wall panels
Fit and weld water wall panels to headers
Lower side wall header—lower side wall
panels
Place lower side wall header 4.0 TON 13.7 TON 55
Place lower side wall panels—water wall 2.5 TON 56.5 TON 141
Field tube welding—vver 2-1/2 TIG 4.2 EA 187.2 EA 786
00
Upper side wall header—upper side wall
panels
Place upper side wall header 4.0 TON 11.1 TON 44
Place upper side wall panels—water wall 2.5 TON 56.5 TON 141
Field tube welding—over 2-1/2 TIG 4.2 EA 187.2 EA 786
00
Place front wall header 4.0 TON 6.1 TON 24
Place front wall panels 2.5 TON 28.2 TON 71
Field tube welding—Over 2-1/2 TIG 4.2 EA 129.6 EA 544
00
Place rear wall header 4.0 TON 5.3 TON 21
Place rear wall panels—water wall 2.5 TON 28.2 TON 71
Field tube welding—ver 2-1/2 TIG 4.2 EA 129.6 EA 544
00