Page 152 - Estimators Piping Man Hour Manual

Section Two-FIELD FABRICATION 135

ACCESS HOLES

Carbon Steel Material

NET MAN HOURS EACH
Nominal WALL THICKNESS
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 1.8 2.0 „ --
5,6,8 2.0 2.2 2.6 ..
10,12 2.2 2.4 2.9 4.0 ~
14, 16, 18 2.3 2.5 3.0 4.3 -

20, 22, 24 2.5 2.9 3.1 4.5 6.8
26, 28, 30 2.9 3.2 3.3 4.8 7.2
32, 34, 36 3.1 3.3 3.7 5.1 7.6
38, 40, 42 3.3 3.7 4.0 5.6 8,4
44, 46, 48 3.7 4.0 4.4 6.7 10.1
54,60 4.6 4.9 5.4 8.3 12.5
Man hours include access holes through 1" diameter (drilled and tapped) for radiographic inspection of welds when
specified or required.
For openings larger than 1" in diameter, add 25% to the above man hours for each V4" increase in diameter.

If plugs are to be included and seal welded, add 0.75 man hours each.