Page 89 - Estimator's Piping Man-Hour Manual 5E
P. 89
72 Section One-SHOP FABRICATION
ACCESS HOLES
Carbon Steel Material
NET MAN HOURS EACH
WALL THICKNESS
Nominal
Pipe Over Over Over Over
Size Uptol" I"to2" 2 "to 2- 1/2" 2- 1/2 "to 4" 4 "to 6"
2-1/2,3,4 1.6 .1.7 -- ..
5, 6, 8 1.8 1.9 2.3 -- -
10, 12 1.9 2.1 2,5 3.5 ..
14, 16, 18 2.0 2.2 2.6 3.7 -
20, 22, 24 2.2 2.5 2.7 3.9 5.9
26,28,30 2.5 2.8 2.9 4.2 6.3
32, 34, 36 2.7 2.9 3.2 4.4 6.6
38, 40, 42 2.9 3.2 3.5 4.9 7.3
44, 46, 48 3.2 3.5 3.8 5.8 8.8
54,60 4.0 4.3 4.7 7.2 10.9
Man hours include access holes through 1" diameter (drilled and tapped) for radiographic inspection of welds when
specified or required.
For openings larger than I" in diameter add 25% to the above man hours for each 1/4" increase in diameter.
If plugs are to be included and seal welded, add 0.5 man hours each.
