PRODUCTIVITY - PUMP
MHR
NO DESCRIPTION / ITEM REQUIRE UNIT REMARKS
DRIVER H.P.
1 To 10 25 MH/ pump Note :
2 15 to 100 100 MH/ pump if a pump has two drivers, such
3 100 to 200 150 MH/ pump as a motor plus a power
4 200 to 300 200 MH/ pump recovery turbine, add. 70% to the
5 300 to 400 250 MH/ pump MH / pump.
6 400 to 500 290 MH/ pump
7 500 to 600 320 MH/ pump
8 600 to 700 350 MH/ pump
9 700 to 800 380 MH/ pump
10 800 to 900 410 MH/ pump
11 900 to 1000 450 MH/ pump
12 over 1000 500 MH/ pump
Horse power or pump brake horse power
BHP = GPM x TDH x SG GPM US GALLON / MINUTE
3960 x E TDH TOTAL DIFFERINTIAL HEAD ( FEET )
= GPM x P S.G. SPECIFIC GRAFITY
1717 x E E PUMP EFFICIENCY ( USE 60 % )
TDH = P ( 3960 ) P DISCHARGE - SUCTION, PSIG
1717 x S.G.
= 2.31 x P
S.G.
DRIVER HP = BHP x 1.0 FOR TURBINE
DRIVER HP = BHP x 1.1 FOR MOTOR, Rounded to nearest standard rating
PRODUCTIVITY - COMPRESSOR
MHR
NO DESCRIPTION / ITEM REQUIRE UNIT REMARKS
Reciprocating, Motor driver
up to 100 BHP 300 Mhr / compressor
101 to 1000 BHP 1,000 Mhr / compressor
1001 to 5000 BHP 3,000 Mhr / compressor
over 5000 BHP 7,000 Mhr / compressor
Reciprocating, Steam Turbine driver
up to 100 BHP 400 Mhr / compressor
101 to 1,000 BHP 1,200 Mhr / compressor
1,001 to 5,000 BHP 4,000 Mhr / compressor
over 5,000 BHP 8,000 Mhr / compressor
Reciprocating, Integral Gas Turbine driver
All 0.80 Mhr / BHP
Centrifugal / Axial, Motor / Steam Turbine
up to 1,000 BHP 1,000 Mhr / compressor
1,001 to 10,000 BHP 4,000 Mhr / compressor
over 10,000 BHP 6,000 Mhr / compressor
Centrifugal / Axial, Gas Turbine
up to 1,000 BHP 1,000 Mhr / compressor
1,001 to 5,000 BHP 3,000 Mhr / compressor
5,001 to 10,000 BHP 5,000 Mhr / compressor
10,001 to 20,000 BHP 7,000 Mhr / compressor
over 20,000 BHP 8,000 Mhr / compressor
Fan and Motor or Steam Turbine
10 to 1,000 BHP 400 Mhr / Fan
over 1,000 BHP 0.40 Mhr / BHP
Note = All standard manhour base on Compressor BHP
PRODUCTIVITY - VESSEL / COLUMN / REACTOR
MHR
NO DESCRIPTION / ITEM REQUIRE REMARKS
Erection of Field Fabricated Vessel
1 Carbon Steel shell 60 Mhr / ton
2 Alloy or Alloy Clad shell 100 Mhr / ton
3 Pressure Vessel Internal
Internal Piping 100 Mhr / ton
Tray - Bubble cap 0.8 Mhr / SF Mhr / M2
Tray - Valve ( Flaxi Tray, Ballast, Grid ) 0.5 Mhr / SF Mhr / M2
Tray - Sieve 0.4 Mhr / SF Mhr / M2
Mist Eliminator Pads 0.8 Mhr / SF Mhr / M2
Inert Packing ( Ring, saddles, balls) 0.2 Mhr / CF Mhr / m3
Catalysts 0.4 Mhr / CF Mhr / m3
Glitch Grid 0.4 Mhr / CF Mhr / m3
PRODUCTIVITY - HEAT EXCHANGER / COOLER
MHR
NO DESCRIPTION / ITEM REQUIRE UNIT REMARKS
1 Shell & Tube Exchanger 2.00 Mhr / ton
Minimum 20 Mhr / shell
Maximum 200 Mhr / shell
2 Double Pipe Exchanger 5.00 Mhr / section
( Fin tubes or U-tubes )
3 Box Cooler
Completely Shop Assembled 20.00 Mhr / ton
Assembles Steel Shell 50.00 Mhr / ton
Place and Connect Coils 25.00 Mhr / ton
Concrete Lining, if required 0.20 Mhr / SF
Mhr / m2
4 Pipe Coil 20.00 Mhr / ton
5 Air Coolers
Completely Shop Assembled 10.00 Mhr / ton
Partially Shop Assembled 15.00 Mhr / ton
Completely Field Assembled 20.00 Mhr / ton
Note :
IF WEIGHT ARE NOT AVAILABLE, ESTIMATE AS FOLLOW
* REGULAR AIR COOLER - ALLOW 0.80 Lb / ESF
ESF : Extended Square Feet of Heat Transfer area
* WINTERIZED AIR COOLERS or "Combinaires" - ALLOW 1.2 Lb / ESF
IF NUMBER OF FANS IS NOT AVILABLE, ESTIMATE AS 1 FAN PER 25,000 ESF
PRODUCTIVITY - REFRACTORY LINING
MHR
NO DESCRIPTION / ITEM REQUIRE REMARKS
Refractory Lining
1 Welded Studs or Clips 0.20 Mhr / SF Mhr / m2
2 Castable Lining up to 2" 0.20 Mhr / SF Mhr / m2
3 Castable Lining up to 3" and above 0.30 Mhr / SF Mhr / m2
4 Hex steel 0.30 Mhr / SF Mhr / m2
5 Scaffolding inside vessel 0.20 Mhr / SF Mhr / m2
Brick Lining 0.12 Mhr / SF Mhr / m2
PRODUCTIVITY - FIELD WELDING
FIELD WELDING FOR CARBON STEEL BUTT WELDS
Flat Plate Vessel Seam Vessel Seam
NO Plate in Horizontal in Horizontal in Horizontal Overhead
Thickness Plane Plane Plane Welds
( Inches ) ( mm ) (Mhr/LF) (Mhr/ m) (Mhr/LF) (Mhr/ m) (Mhr/LF) (Mhr/ m) (Mhr/LF) (Mhr/ m)
1 1/4 0.90 1.00 1.10 1.50
2 3/8 1.35 1.50 1.70 2.25
3 1/2 1.55 1.70 1.95 2.60
4 5/8 1.75 1.95 2.20 2.90
5 3/4 2.10 2.30 2.60 3.50
6 7/8 2.20 2.40 2.80 3.70
7 1 2.30 2.60 2.90 3.80
8 1 1/2 3.10 3.40 3.90 5.20
9 2 4.00 4.50 5.00 6.70
10 2 1/2 5.90 6.50 7.40 9.90
11 3 8.40 9.30 10.50 14.00
12 4 14.80 16.50 18.50 24.80
For Alloy materials or Clads plate - multiply by 2
Preheating for C.S or alloy material - multiply C.S. Buttweld Mhr by 0.33
Local stress relief - multiply C.S. Buttweld Mhr by 1.55
Radiographic inspection - to 1" plate allow 1.00 Mhr / LF
Radiographic inspection - over 1" plate allow 1.50 Mhr / LF
Flame Cutting, C.S. Plate - multiply C.S. Buttweld Mhr by 0.30
Flame Cutting, Alloy Plate - multiply C.S. Buttweld Mhr by 0.60
PRODUCTIVITY - COOLING TOWER
MHR
NO DESCRIPTION / ITEM REQUIRE UNIT REMARKS
COOLING TOWER 0.20 Mhr / GPM
