Page 136 - Estimators Piping Man Hour Manual

Section Two-FIELD FABRICATION 119

BORING INSffiE DIAMETER OF PIPE
AND mSTALLOTO STRAIGHTENING VANES

NET MAN HOURS EACH

Boring I.D. Installing Straightening
Nominal of Pipe Vanes
Pipe Size
Inches Carbon Steel Carbon Steel Alloy
4 9.8 7.6 11.3
5 11.7 8.7 13.1
6 13.3 10.7 15.2
8 17.5 12.6 18.9
10 20.9 13.9 20.9
12 25.6 15.6 23.7
14 29.5 17.6 26.3

16 35.5 19.5 29.5
18 44.0 22.1 33.0
20 57.7 24.8 37.2
24 79.1 30.2 45.4
26 -- 35.9 54.0
28 -- 39.6 59.8
30 - 45.9 68.8
32 -- 53.1 79.9
34 -- 59.8 89.9
36 -- 68.8 103.3

38 -- 76.9 115.8
40 „ 85.2 127,7
42 -- 93.7 140.7
Man hours for boring I.D. of pipe include boring for a length of four times nominal pipe size.
Man hours for installing straightening vanes are baaed on installing vanes in pipe where boring the I.D. of pipe is
not required. If boring I.D. of pipe is required or specified, add boring man hours as shown above.