Page 172 - Estimators Piping Man Hour Manual

Fabrication of alloy and non-ferrous piping is to be figured on the same basis as for corresponding operation on
carbon steel materials, plus the percentage given below applicable to the carbon steel man hour schedules.
FLAME CUTTING OR BEVELING (PERCENT ADDITIVE)

MTR'L. CLASSIFICATION
Nominal
Pipe Group Group Group
Size 1 2 6 '
2 or less 17.0 22.5 39.0
3 18.5 25.0 41.0
4 20.0 27.0 45.5
5 21.0 28.0 49.0
6 23.0 31.0 50.0
8 26.0 35.0 59.0
10 28.5 38.0 64.0
12 30.0 40.0 70.0
14 33.0 44,0 78.0
16 35.0 47.0 86.0
18 39.5 53.0 92.0
20 43.5 58.0 100.0
22 46.0 62.0 103.5
24 49.0 66.0 107.0
26 53.0 71.5 116.0
28 57.0 77.0 124.9
30 61.0 82.5 133.8
32 65.3 88.0 142.7
34 69.4 93.5 151.6
36 73.4 99.0 160.6
38 77.5 104.5 169.5
40 81.6 110.0 178.4
42 85.7 115.5 187.3

Material in Groups 1,2 and 6 only will flame cut. AH others are to be machine cut. See respective percentage tables
for others.
ASTM A335-P1 .50% Moly
Stainless Steels
GROUP
ASTM A335-P2 ,50-.70% Chr.
4 Types 304, 309, 310, 316
(including "L" & "H" Grades)
GROUP ASTMA335-P12 .85-1. 10% Chr.
ASTMA335-P11 1.05- 1.45% Chr.
GROUP Copper, Brass, Everdur
ASTM A335-P3 1.50-2.00% Chr. 5

ASTM A335-P3b 1.75-2.25% Chr.
ASTMA-333-GR-1
ASTM A335-P22 2.00-2.50% Chr.
GROUP GROUP ASTM A-333-GR4
6
2 ASTMA335-P21 2.75-3.25% Chr.
ASTM A-333-GR9
ASTM A335-P5,b,c 4.00-6.00% Chr.
..
—
ASTM A335-P7 6.00-8.00% Chr. GROUP Hastelloy, Titanium, 99%* Ni.
7
ASTM A335-P9 8.00-10.00% Chr.
GROUP Stainless Steels Types 321 & 347, Cu-Ni,
GROUP 8 Monel, Inconel, Incoloy, Alloy 20
3 Ferritic Chromes 10.00- 15.00% Chr.
GROUP
ASTM A333 Gr. 3 3.50% Nickel 9 Aluminum