Page 76 - Industrial Process Plant Construction Estimating and Man Hour Analysis

Process piping Chapter 2 47

2.6 Schedule D—Alloy and nonferrous weld factors
Welding percentages for alloy and nonferrous metals

Material classification-group numbers
Pipe size 1 2 3 4 5 6 7 8
2 0.25 0.54 0.20 0.58 2.11 2.25 0.225 0.45
3 0.275 0.58 0.23 0.61 2.15 2.32 0.25 0.495
4 0.30 0.61 0.25 0.68 2.22 2.35 0.28 0.54
5 0.315 0.63 0.57
6 0.345 0.65 0.30 0.75 2.28 2.40 0.30 0.62
8 0.39 0.74 0.50 0.88 2.38 2.50 0.34 0.70
10 0.425 0.85 0.75 0.95 2.45 2.75 0.375 0.765
12 0.45 2.00 0.80 2.04 2.50 3.00 0.40 0.81
14 0.49 2.15 0.88
16 0.525 2.23 0.945
18 0.59 2.30 2.06
20 0.65 2.45 2.17
24 0.73 2.24
Group 1—Chrome molybdenum steel, chrome—1/2%–13%, moly—TO 1%
Group 2—18-8 Stainless steel, TY, 304, 316, and 347
Group 3—Copper, brass, and everdur
Group 4—Aluminum, monel, and copper, chrome-nickel