Page 36 - Estimator's Piping Man-Hour Manual 5E

Section One-SHOP FABRICATION 19

ATTACHING ORIFICE FLANGES—WELD NECK TYPE

Carbon Steel Material
MAN HOURS PER PAIR
SERVICE PRESSURE RATING
Size
Ins. 300 Lb. 400 Lb. 600 Lb. 900 Lb. 1500 Lb.
3 5.6 6.0 7.7 7.8 8,3

4 7.8 8.2 9.4 9.5 10.7
6 9.8 10.4 12.2 12.4 13 ?*
8 13.1 13.4 15.6 15.9 18,2
10 14.7 15.0 19.4 20.2 21.6
1 *> 16.8 18.8 20.3 21.5 24.3
14 19.2 20.5 22.H 24.1 27.8
if ; 21.2 22.0 27.6 28.2 31.2
I N 26.1 26.9 29.7 31.1 35.9

20 28.7 29.4 33.3 34.1 41.6
24 37.1 37.8 43.3 44.2 _.
2H _ 41.1 44.9 45.6 _
30 - 47.5 50.9 52.6
34 - 57.2 60.7 62.6 _
_
36 60.0 67.4 68.7 _.
_
42 87.6 91.7 - _
Man hours include setting, aligning, welding, placement of paddle-type plates, and bolting up of pair of orifice
flanges.
Man hours exclude cutting and beveling of pipe. See respective tables for these man hours.