Page 84 - Estimators Piping Man Hour Manual

Section Otie-SHOP FABRICATION 67

MAGNETIC OR DYE PENETKANT INSPECTION
OF WELDED JOINTS

All Thicknesses and Schedules

NET MAN HOURS EACH

MAGNETIC DYE PENETRANT
Size
Inches Butt Welds Nozzle Welds Butt Welds Nozzle Welds
2 or less 0.6 0.9 0.8 1.3
2-1/2 0.7 1.1 0.9 1.4
3 0.8 1.2 1.1 1.6
3-1/2 0.9 1.4 1.2 1,9

4 1.1 1.6 1.5 2.2
5 1.4 2.1 1.9 2.8
6 1.7 2.6 2.3 3.5
8 2.0 3.0 2.8 4.1
10 2.5 3.7 3.3 5.0
12 3.1 4.7 4.2 6.3
14 OD 3.4 5.2 4.6 6.9
16 OD 3.9 5.8 5.2 7.9

18 OD 4.4 6.6 5.8 8.7
20 OD 4.8 7.2 6.5 9.7
24 OD 5.6 8.5 7.5 11.1
Man hours above are for a single inspection. When specifications call for multiple inspections during the progress
of welding, the man hours shown above will apply for each of the total number of inspections.
Magnetic particle or liquid penetrant inspection of weld end preparations should be charged at the same man
hours as comparable inspection of the same size butt weld.
For inspection of reinforced nozzle welds, add 150% to the above man hours to include both the nozzle weld and the
pad weld.
For inspection of slip-on flange welds add 50% to the above man hours.
For inspection of small connections such as couplings, bosses, thredolets and weldolets use the man hours shown
for corresponding sizes of nozzle welds.