Page 40 - Estimator's Piping Man-Hour Manual 5E

Section One-SHOP FABRICATION 23

MANUAL BUTT WELDS
Labor for Welding Only
Carbon Steel Materials
NET MAN HOURS EACH
Standard Extra
Pipe Heavy Pipe SCHEDULE NUMBERS
Size &OD Sizes & OD Sizes
Ins. 3/8 "Thick 1/2" Thick 20 30 40 60 80 100 120 140 160
_ _ _ _ _ _ _ _
1 0.6 0.7 _ _ 0.6 0.7 -- _. 0.9
1-1/4 0.7 0.7 -- 0.7 -- 0.7 -- -- ._ 1.0
_ _
1-1/2 0.7 0.8 -- 0.7 -- 0.8 -- ~­ -- 1. 1
_ _ _ _ _ _ _ _ _ _
2 0.8 0.9 0.8 ._ 0.9 1.4
2-1/2 1.0 1.1 -- -- 1.0 -- 1.1 -- -- -- 1.6
_ _ _ _ _ _ _ _ _ _
3 1.1 1.2 1. 1 1.2 -- 1.8
3-1/2 1.2 1.4 -- -- 1.2 -- 1.4 -- -- -- --
4 1.3 1.6 -- -- 1.3 1.6 .. 2.4 .. 2.6
—
5 1.5 1.9 -- .. 1.5 ._ 1.9 — 2.5 -- 3.3
_ _ _ _ _ _ _ _
6 1.8 2.1 1.8 2. 1 ._ 3.2 4.3
8 2.2 2.8 2.2 2.2 2.2 2.5 2.8 3.8 5. 1 1 6.4 7,3
10 2, 7 3.4 2.7 2.7 2.7 3.4 4.3 5.8 1 8.0 9.6 11.1
12 3.1 4.0 3.1 3.1 3.4 4.4 5.6 8.4 10.4 13.0 15.2
14 OD 3.6 4.8 3.6 3.6 4.2 5.8 8.1 11.2 13.7 16.3 19. 2

16 OD 4. 2 5.6 4. 2 4.2 5.6 7.1 10.5 14.3 17.6 21. 1 23.5
18 OD 4.9 6.5 4.9 5.7 7.3 9.5 13.9 18.5 21.7 25.4 28.6
20 OD 5.3 7. 1 5.3 7.1 7.9 11.7 16.5 22.1 27.0 31.3 34.6
24 OD 5.9 8.5 5.9 10.5 11.2 17.0 26.3 30.4 36.9 41.8 50.2

Pipe Thickness: Wall thickness of the pipe determines the man hours that will apply. For butt
welds of double extra strong materials, use Schedule 160 listings.
Mitre Welds: Add 50% to butt weld man hours.
Cutting and Beveling Pipe: Man hours do not include cutting and beveling of pipe. See respective tables for these
charges.
Preheating: H specified or required by Codes, add for this operation. See man hours for pre­
heating.
Stress Relieving: Stress relieving of welds in carbon steel material is required by the A.S. A.
Code of Pressure piping where the wall thickness is 3/4" or greater.
A.11 sizes of butt welds shown below the ruled lines are 3/4" or greater in wall thickness
and must be stress relieved.
Where stress relieving is required, an extra charge should be made. See man hours for
stress relieving.
Unlisted Sizes: Unlisted sizes take the next higher listing.
General Notes: For additional notes on welding see page 18.