ETL 1110-2-534
30 Sep 94
Table A-1
Mechanical Properties and Allowable Design Stresses
(Source: NAAMM and NOMMA)
Allowable Stress
Minimum Yield
Elastic Modulus
MPa x 103
Metal and Alloy
MPa
MPa
Carbon Steel Pipe:
A53, Type F
124
172
200
Types E and S, Grade A
149
207
200
Types E and S, Grade B
172
241
200
Carbon Steel Struc. Tubing:
A500, Grade A
164
228
200
A500, Grade B
207
290
200
A500, Grade C
228
317
200
A501
179
248
200
Aluminum Pipe:
6063 T5, T52
79*
110
69
6063 T6
124*
172
69
6063 T832
165*
241
69
6061 T6
165**
241
69
Stainless Steel Tubing:
Annealed, Types 302,
304, and 316
124
207
193
Unannealed Types 302,
304, and 316
207
345
193
Note: American Iron and Steel Institute (1985) specifies fb = 0.72fy. It also specifies that the diameter-thickness ratio of hollow
circular sections shall not exceed 3300/fy. For aluminum, allowable stresses are those specified by the Aluminum Association;
for stainless steel and copper, the allowable stresses shown are 0.60fy.
* Reduce allowable stress to 55 MPa within 25 mm of any weld.
** Reduce allowable stress to 97 MPa within 25 mm of any weld.
Table A-2
Pipe Section Properties
(Source: NAAMM and NOMMA)
Outside
Inside
Wall
Section
Moment of
Nominal
Schedule
Diameter
Diameter
Thickness
Area
Modulus
Inertia
mm2
mm3
mm4 x 103
Size
No.
mm
mm
mm
32
5
42
39
1.7
210
2,050
43
10
37
2.8
343
3,160
67
40
35
3.6
431
3,850
81
80
32
4.9
569
4,770
101
38
5
48
45
1.7
242
2,720
66
10
43
2.8
395
4,260
103
40
41
3.7
515
5,340
129
80
38
5.1
689
6,750
163
51
5
60
57
1.7
305
4,340
131
10
55
2.8
501
6,880
208
40
53
3.9
693
9,190
277
80
49
5.5
953
11,980
361
A-3
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