Page 140 - Estimators Piping Man Hour Manual

Section Two-FIELD FABRICATION 123

PREHEATING LABGE O.D. PIPE BUTT WELDS AND ANY
TYPE FLANGE WELDS

Carbon Steel Or Alloy Materials
For Temperatures Up To 400 °F

NET MAN HOURS EACH
O.D. WALL THICKNESS IN INCHES
Pipe .500
Inches Or Less .750 1.00 1.25 1.50 1.75 2.00 2.25
26 7.6 8.5 10.3 12.5 14.5 16.0 18.3 20.5
28 8.3 9.2 10.9 13.1 15.3 17.0 19.5 21.9
30 8.9 9.6 11.8 14.0 16.3 18.1 20.8 23.5
32 9.3 10.3 12.3 14.8 17.2 19.1 21.9 24.8
34 10.0 10.9 13.0 15.8 18.6 20.5 23.2 26.6
36 10.7 11.8 13.8 17.2 20.5 22.5 25.7 29.0
38 10.9 12.5 15.0 18.3 22.8 24.8 28.3 31.9
40 11.2 13.5 16.3 19.5 25.3 27.1 31.0 35.2
42 12.0 14.4 17.6 21.0 28.1 30.0 34.1 38.6
44 13.0 15.3 19.5 24.0 29.3 32.9 37.6 43.3
46 13.9 16.4 21,2 26.3 31.5 36.1 41.1 46.1
48 15.0 17.6 23.0 28.6 33.9 39.3 44.8 50.3
54 16.9 19.8 25.8 32.1 38.1 44.3 50.4 56.5
60 18.8 21.9 28.8 35.6 42.4 49.1 56.1 62.S
2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25
26 22.8 24.9 27.1 29.4 31.6 33.7 36.0 38.2
28 24.2 26.3 29.0 30.8 33.0 35.3 37.5 39.8
30 25.7 28.0 30.3 32.1 34.5 36.6 39.3 41.1
32 27.0 29.3 31.9 33.5 35.8 38.0 40.6 42.5
34 28.8 31.0 33.5 35.3 37.6 39.8 42.4 44.3
36 30.2 33.5 36.0 37.9 40.1 42.4 44.8 46.8
4.50 4.75 5.00 5.25 5.50 5.75 6.00

26 40.5 42.7 44.8 47.1 49.3 51.6 53.8
28 42.0 44.0 46.3 48.5 50.7 53.0 55.7
30 43.3 45.5 47.8 50.0 52.0 54.3 57.0
32 44.6 46.8 49.1 51.3 53.6 55.8 58.4
34 46.4 48.0 50.9 53.1 55.0 57.5 60.2
36 49.0 51.2 53.5 55.7 57.7 59.9 62.7

For Genera,! Notes, nee the bottom of page 121.